------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ VR326 Color Monitor Service Guide Order Number EK-VR326-SV.001 Digital Equipment Corporation ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ First edition, August 1991 The information in this document is subject to change without notice and should not be construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that may appear in this document. Possession, use, duplication, or dissemination of the software described in this documentation is authorized only pursuant to a valid written license from Digital or the third-party owner of the software copyright. No responsibility is assumed for the use or reliability of software on equipment that is not supplied by Digital Equipment Corporation. Copyright © Digital Equipment Corporation 1991 All Rights Reserved. Printed in U.S.A. The following are trademarks of Digital Equipment Corporation: DEC, Digital, and the Digital logo. This document was prepared and published by Educational Services Development and Publishing, Digital Equipment Corporation. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Contents ------------------------------------------------------------ Preface vii 1 Overview 1.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1.1 Model Variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.3 Recommended Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2 Troubleshooting 2.1 Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.2 Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.3 Troubleshooting Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 3 Removing and Replacing FRUs 3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.1.1 Removing External Cables . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.1.2 Removing the Rear Cover . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 3.1.3 Removing the Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 3.2 Field Replaceable Units (FRUs) . . . . . . . . . . . . . . . . . . . . . . . 3-7 3.2.1 Removing the Interconnect Cable . . . . . . . . . . . . . . . . . . . 3-8 3.2.2 Removing the Power Supply Module . . . . . . . . . . . . . . . . . 3-9 3.2.3 Discharging the CRT and Removing the Anode Cap . . . . . 3-12 3.2.4 Removing the Deflection Module . . . . . . . . . . . . . . . . . . . . 3-14 3.2.5 Removing the Video Assembly . . . . . . . . . . . . . . . . . . . . . . 3-18 3.2.6 Removing the CRT/Bezel/Chassis Assembly . . . . . . . . . . . . 3-23 3.3 CRT Disposal (Trained Service Personnel Only) . . . . . . . . . . 3-24 3.4 Tilt-Swivel Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27 iii ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ iv Contents 4 Aligning the Video Monitor 4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4.1.1 Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.1.2 Warm-Up Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.1.3 LEDs and Heater Filament . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.1.4 Video Screen Alignment Preparation . . . . . . . . . . . . . . . . . 4-3 4.2 Using the Radiance Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 4.3 Monitor Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 4.3.1 Before Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 4.3.2 Geometry Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 4.3.3 Focus Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 4.3.4 Cutoff Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 4.3.5 Color/White Balance Adjustments . . . . . . . . . . . . . . . . . . . 4-14 A Alignment Screens A.1 Circle-Crosshatch Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 A.2 All-White Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 A.3 Central Rectangle Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3 A.4 All ``Es'' Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4 A.5 Color Bars I Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5 A.6 Color Bars II Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5 B VR326 Specifications C VR326 Documentation Index ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Contents v Figures 1-1 VR326 Color Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 3-1 Removing the Cables from the Monitor . . . . . . . . . . . . . . . . . 3-3 3-2 Removing the Rear Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 3-3 Removing the Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 3-4 VR326 Field Replaceable Units . . . . . . . . . . . . . . . . . . . . . . . 3-7 3-5 Removing the Interconnect Cable . . . . . . . . . . . . . . . . . . . . . 3-8 3-6 Removing Cables from the Power Supply . . . . . . . . . . . . . . . . 3-10 3-7 Removing the Power Supply Module . . . . . . . . . . . . . . . . . . . 3-11 3-8 Discharging the CRT and Removing the Anode Cap . . . . . . . 3-13 3-9 Unplugging the Deflection Module Cables . . . . . . . . . . . . . . 3-15 3-10 Disconnecting Cables from the Deflection Module . . . . . . . . . 3-16 3-11 Removing the Deflection Module . . . . . . . . . . . . . . . . . . . . . . 3-17 3-12 Removing Cables from the Video Assembly . . . . . . . . . . . . . . 3-19 3-13 Removing the Shield from the Video Assembly . . . . . . . . . . . 3-20 3-14 Removing the CRT Socket Connector . . . . . . . . . . . . . . . . . . . 3-21 3-15 Removing the Video Assembly . . . . . . . . . . . . . . . . . . . . . . . 3-22 3-16 Crushing the Evacuation Point . . . . . . . . . . . . . . . . . . . . . . . 3-26 3-17 Tilt-Swivel Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28 4-1 Mark Center, Left, and Right Sides of Video Screen . . . . . . . 4-3 4-2 Radiance Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 4-3 Using the Radiance Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 4-4 Adjustment Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 4-5 User Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 4-6 G2-Screen and Focus Adjustment Locations . . . . . . . . . . . . . 4-9 4-7 Adjustment Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 4-8 Cutoff Adjustment Locations . . . . . . . . . . . . . . . . . . . . . . . . . 4-13 4-9 Gain Adjustment Locations . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15 A-1 Circle-Crosshatch Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 A-2 All-White Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 A-3 Central Rectangle Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3 A-4 All ``Es'' Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4 A-5 Color Bars I Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5 A-6 Color Bars II Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ vi Contents Tables 1-1 Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-2 VR326 Recommended Spare Parts . . . . . . . . . . . . . . . . . . . . . 1-2 2-1 Blank Screen, No Video or Raster . . . . . . . . . . . . . . . . . . . . . 2-3 2-2 Blank Screen, No Video but Raster Present . . . . . . . . . . . . . . 2-4 2-3 Loss of Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 2-4 Color Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 2-5 Poor Display Quality: Color, Brightness, Geometry, or Focus 2-8 B-1 Monitor Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . B-1 B-2 Monitor Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . B-2 B-3 Monitor Environmental Specifications . . . . . . . . . . . . . . . . . . B-2 B-4 Video Timing--1024 x 768 Resolution . . . . . . . . . . . . . . . . . . B-3 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Preface ------------------------------------------------------------ This manual describes how to service the VR326 color monitor in the field. Manual Organization This manual covers the following topics: · Chapter 1 provides a general overview of the product and includes a list of spare parts. · Chapter 2 provides troubleshooting procedures. · Chapter 3 provides the removal and replacement procedures for the field replaceable units (FRUs). · Chapter 4 provides the alignment procedures. · Appendix A shows sample alignment screens. · Appendix B lists the VR326 specifications. · Appendix C describes the related documentation. Audience The procedures in this manual are for service technicians trained only by Digital Equipment Corporation. Conventions Warning Provides information on personal safety. Caution Provides information to prevent damage to the equipment. Note Provides general information. PN Refers to a part number. ! Refers to an item in an illustration. vii ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 1 Overview ------------------------------------------------------------ 1.1 Product Description The VR326 color monitor (Figure 1-1) has a direct viewed antiglare screen with an auto-ranging power supply for worldwide operation. Its built-in tilt-swivel stand lets the user adjust the screen for viewing comfort. When connected to a host system, the VR326 can display information sent by the host. Figure 1-1 VR326 Color Monitor 1-1 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 1-2 Overview 1.1.1 Model Variations The monitor is available in the following models: ------------------------------------------------------------ Model Applicable Area ------------------------------------------------------------ VR326-DA 15" Color monitor Northern Hemisphere VR326-D4 15" Color monitor Southern Hemisphere ------------------------------------------------------------ 1.2 Tools and Equipment You need the following tools and equipment to service the VR326 monitor: Table 1-1 Tools and Equipment ------------------------------------------------------------ Item Part Number ------------------------------------------------------------ Terminal technician tool kit 29-27340-01 Static protection kit 29-26246-00 Anode discharge tool 29-24717-00 Metric measuring tape 29-25342-00 Safety goggles 29-16141-00 Gloves 29-16146-00 ------------------------------------------------------------ 1.3 Recommended Spare Parts The following are the recommended spare parts for the VR326 monitor: Table 1-2 VR326 Recommended Spare Parts ------------------------------------------------------------ Part Part Number ------------------------------------------------------------ Power supply 54-19629-04 Deflection module 54-19828-01 Video assembly 70-27072-01 Module interconnect cable 70-27000-02 CRT/Bezel/Chassis assembly 70-27070-01 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 2 Troubleshooting ------------------------------------------------------------ This chapter describes how to troubleshoot a VR326 color monitor problem through fault isolation. 2.1 Before You Start The following information will help you troubleshoot the monitor easily and effectively: WARNING If you detect burning components, turn power to the monitor off and disconnect the power cord from the power source. · If a customer calls with a display quality type of problem, ask the customer to leave the monitor on until you arrive to minimize the warm-up time. · Magnetic fields affect monitor performance and can give a false indication of a monitor failure. Place the monitor away from any electromagnetic devices, such as printers and terminals, or away from large magnetized objects, such as filing cabinets and steel beams in walls. NOTE Any time you replace a video assembly, deflection module, or power supply module, perform all the necessary adjustments. Refer to Chapter 3. 2-1 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 2-2 Troubleshooting 2.2 Troubleshooting Procedures These procedures assume that only one assembly has failed or only one problem exists. Always troubleshoot the most obvious symptom first; however, one symptom may indicate multiple failures. Problems may come from either the host system or the monitor. Troubleshoot the VR326 color monitor as follows: 1. Ask the operator to describe the problem. 2. Identify the problem. The screen display often indicates which problem is occurring. 3. Isolate the problem. Refer to the troubleshooting tables to find the suggested solutions. 4. Display the host system alignment test patterns to make sure that no other problem exists. Refer to the host system service guide for displaying test patterns. 2.3 Troubleshooting Tables The troubleshooting tables list the possible cause in order of probability. This troubleshooting information applies to five types of video problems your VR326 monitor may exhibit: · A blank screen, without video or raster (Table 2-1) · A blank screen, without video, but with raster present (Table 2-2) · Loss of synchronization (Table 2-3) · Color problems (Table 2-4) · Poor display quality: color, brightness, geometry, or focus (Table 2-5) Use the troubleshooting tables as follows: 1. Note the general symptom of the problem. 2. Check the Symptom column in the referenced table for a match. 3. Check the conditions in the Possible Cause column in the order given. 4. Perform the action in the Suggested Solution column in the order given. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Troubleshooting 2-3 Table 2-1 Blank Screen, No Video or Raster ------------------------------------------------------------ Symptom Possible Cause Suggested Solution ------------------------------------------------------------ Blank screen, no video or raster. The monitor is on (power switch is in), but the power indicator is off. The power cord is not connected. Low or no power exists at wall outlet. Connect the power cord to the power source or monitor. Use another wall outlet. If the problem continues, call the facilities person. The power supply module is faulty. Replace the power supply module (Section 3.2.2). The deflection module is faulty. Replace the deflection module (Section 3.2.4). The video assembly is faulty. Replace the video assembly (Section 3.2.5). ------------------------------------------------------------ There is no video or raster, but the power indicator is on. The brightness or contrast control is set incorrectly. Adjust the brightness and contrast controls. Power to the host system is off. The host signal cables are disconnected. Turn power to the host system on. Connect the signal cables to the host and the monitor. Internal cabling is loose or faulty. Check all cabling going to and from the deflection module and the video assembly, including the CRT socket. If necessary, secure the cables. The signal cable is faulty. Replace the signal cable. Cutoff is set incorrectly. Perform the Cutoff alignment procedures (Section 4.3.4). The deflection module is faulty. Replace the deflection module (Section 3.2.4). The video assembly is faulty. Replace the video assembly (Section 3.2.5). ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 2-4 Troubleshooting Table 2-1 (Continued) Blank Screen, No Video or Raster ------------------------------------------------------------ Symptom Possible Cause Suggested Solution ------------------------------------------------------------ The CRT/Bezel /Chassis assembly is faulty. Replace the CRT/Bezel /Chassis assembly (Section 3.2.6) only after trying all the previous solutions. ------------------------------------------------------------ Table 2-2 Blank Screen, No Video but Raster Present ------------------------------------------------------------ Symptom Possible Cause Suggested Solution ------------------------------------------------------------ No video or cursor can be seen even when the contrast control is set to maximum; however, the raster can be displayed by adjusting the brightness control. The host screen saver is activated. The signal cable is faulty. The host system is not supplying video signals to the monitor. Press any key to reactivate the display Replace the signal cable. Refer to the host system documentation. Connect the monitor to a known working host and verify the problem before replacing any monitor modules. The host system is faulty. Repair the host system. Internal cabling is loose or faulty. Check all cabling going to and from the deflection module and the video assembly. If necessary, secure the cables. The video assembly is faulty. Replace the video assembly (Section 3.2.5). The deflection module is faulty. Replace the deflection module (Section 3.2.4). The CRT/Bezel /Chassis assembly is faulty. Replace the CRT/Bezel/Chassis assembly (Section 3.2.6) only after trying all the previous solutions. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Troubleshooting 2-5 Table 2-3 Loss of Synchronization ------------------------------------------------------------ Symptom Possible Cause Suggested Solution ------------------------------------------------------------ The video display with 4-bar color pattern is out of sync. The video cables are faulty or connected incorrectly. Connect the video cables. ------------------------------------------------------------ The 4-bar color pattern is out of sync and green is not present. The video cables are connected incorrectly. Swap the red and green video cables to both the monitor and the host system, then: 1. If green is present and in sync, replace the video cable. 2. If green is not present, swap the red and green video cables to the monitor. If green is displayed and in sync, repair the host system. After swapping the red and green video cables, if the display comes up green and out of sync, go to the next probable cause. ------------------------------------------------------------ The 4-bar color pattern is out of sync and green is present. The monitor or host system is faulty. If another VR326 monitor is available, swap the monitors to determine if the problem continues. If the problem continues, repair the host system. If the problem does not reoccur, the problem is in the monitor. If another VR326 monitor is not available, replace the deflection module (Section 3.2.4). The deflection module is faulty. Replace the deflection module (Section 3.2.4). ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 2-6 Troubleshooting Table 2-3 (Continued) Loss of Synchronization ------------------------------------------------------------ Symptom Possible Cause Suggested Solution ------------------------------------------------------------ The deflection module is functioning correctly, but the video assembly is faulty. Replace the video assembly (Section 3.2.5). The deflection module and the video assembly are functioning correctly, but the host system is faulty. Repair the host system. ------------------------------------------------------------ NOTE Make sure the monitor has warmed up for at least 20 minutes before using Table 2-4. See Appendix A for the color patterns. Table 2-4 Color Problems ------------------------------------------------------------ Symptom Possible Cause Suggested Solution ------------------------------------------------------------ The wrong color displays. When the 4-color bar pattern displays, the primary colors do not display in their proper sequence. The video cables are crossed. Swap the video cables. ------------------------------------------------------------ Red or blue color is missing. The missing color is restored when the red and blue cables are swapped at both the monitor and the host system. The color that was present is now missing. The signal cable is faulty. Replace the signal cable. Be sure the cables are installed in the correct connectors. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Troubleshooting 2-7 Table 2-4 (Continued) Color Problems ------------------------------------------------------------ Symptom Possible Cause Suggested Solution ------------------------------------------------------------ Red or blue color is missing. The missing color is restored when the red and blue cables are swapped at the monitor. The host system is faulty. Repair the host system. ------------------------------------------------------------ Green color is missing, but the video is in sync. Swap the red and green video cables at the monitor. If green is still missing, the problem is in the monitor. Repair the monitor. If green is restored, the problem is in the host system. Repair the host system. The video assembly is faulty. Replace the video assembly (Section 3.2.5). The CRT/Bezel /Chassis assembly is faulty. Replace the CRT/Bezel /Chassis assembly (Section 3.2.6) only after trying all the previous solutions. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 2-8 Troubleshooting Table 2-5 Poor Display Quality: Color, Brightness, Geometry, or Focus ------------------------------------------------------------ Symptom Possible Cause Suggested Solution ------------------------------------------------------------ Poor centering. The centering controls on top of the monitor or on the deflection module are set incorrectly. Adjust the centering controls on top of the monitor and check the deflection adjustments. Refer to Chapter 4. ------------------------------------------------------------ Poor geometry or linearity. The monitor is out of adjustment. Perform the appropriate adjustments. Refer to Chapter 4. The deflection module is faulty. Replace the deflection module (Section 3.2.4) and perform all deflection adjustments. ------------------------------------------------------------ Poor color purity. Different colors can be seen when an all-red pattern displays. The monitor needs to be degaussed. Press the degauss button to correct color distortions. Local magnetic fields are present. Remove any electro-mechanical devices from the vicinity of the monitor, or move the monitor to another location. CRT/Bezel/Chassis assembly is faulty. Replace the CRT/Bezel/Chassis assembly (Section 3.2.6) only after trying all the previous solutions. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Troubleshooting 2-9 Table 2-5 (Continued) Poor Display Quality: Color, Brightness, Geometry, or Focus ------------------------------------------------------------ Symptom Possible Cause Suggested Solution ------------------------------------------------------------ Poor light output (using the all-white diagnostic pattern). The brightness or contrast controls are set incorrectly. Adjust the brightness and contrast controls. The video assembly is out of adjustment. Perform the color adjustments. Refer to Chapter 4. The host system is not supplying the correct signal levels. Repair the host system. The video assembly is faulty. Replace the video assembly (Section 3.2.5). CRT wearout Replace the CRT/Bezel/Chassis assembly (Section 3.2.6) only after all trying all the previous solutions. ------------------------------------------------------------ Poor color balance. The video assembly is not adjusted correctly. Perform all the color adjustments. Refer to Chapter 4. Signal levels from the host system are not properly balanced. Repair the host system. The video assembly is faulty. Replace the video assembly (Section 3.2.6). The CRT/Bezel /Chassis assembly is faulty. Replace the CRT/Bezel/Chassis assembly (Section 3.2.6) only after trying all the previous solutions. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 2-10 Troubleshooting Table 2-5 (Continued) Poor Display Quality: Color, Brightness, Geometry, or Focus ------------------------------------------------------------ Symptom Possible Cause Suggested Solution ------------------------------------------------------------ The display is not clear or sharp. Focus is out of adjustment. Perform the Focus adjustment. Refer to Section 4.3.3. Cutoff and Gain settings are incorrect. Readjust the Cutoff and Gain settings. Refer to Section 4.3.4. Internal cabling is loose or faulty. Check all cabling going to and from the deflection module and the video assembly. If necessary, secure the cables. The power supply module is faulty. Replace the power supply module (Section 3.2.2). The video assembly is faulty. Replace the video assembly (Section 3.2.6). The CRT/Bezel /Chassis assembly is faulty Replace the CRT/Bezel/Chassis assembly (Section 3.2.6) only after trying all the previous solutions. ------------------------------------------------------------ Display characters seem to flicker or ``swim.'' There is ac electromagnetic interference from adjacent power lines or appliances. If possible, remove any electromagnetic devices from the vicinity of the monitor, or move the monitor to another location. The power supply module is faulty. Replace the power supply module (Section 3.2.2). The deflection module is faulty. Replace the deflection module (Section 3.2.4). ------------------------------------------------------------ NOTE If the monitor cannot be internally degaussed and the problem is not caused by external magnetic fields, replace the CRT/Bezel /Chassis assembly (Section 3.2.6) only after trying all the previous solutions. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3 Removing and Replacing FRUs ------------------------------------------------------------ 3.1 Introduction This chapter describes how to remove and replace the VR326 color monitor field replaceable units (FRUs). Perform all the removal and replacement procedures from the rear of the monitor. Tilt the monitor from the back to the front allowing easier access to the modules. NOTE If you twist the monitor while applying the tilt pressure, the monitor moves more easily. The procedures describe how to prepare the terminal to remove the FRUs. To install each item, do the reverse of the removal procedure. WARNING Turn power to the monitor off. Disconnect the power cord from the power source before performing any of these procedures. NOTE Any time you replace a video assembly, deflection module, or power supply module, perform all the necessary adjustments in Chapter 4. 3-1 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-2 Removing and Replacing FRUs 3.1.1 Removing External Cables Remove the external cables (Figure 3-1) as follows: 1. Make sure the power switch is off (out). 2. Unplug the power cord from the wall outlet first, then from the monitor. Turn the power switch on and off after removing the power cord to discharge the internal modules. 3. Remove the three video signal cables from the rear of the monitor. NOTE Push each connector in and rotate it counter-clockwise until the signal cable is released from the connector. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-3 Figure 3-1 Removing the Cables from the Monitor ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-4 Removing and Replacing FRUs 3.1.2 Removing the Rear Cover NOTE Before removing any FRUs, you must remove the rear cover and the top cover. Remove the rear cover as follows: 1. Remove the external cables (Section 3.1.1). 2. Use a Phillips screwdriver to remove the four screws that hold the rear cover to the enclosure (Figure 3-2). 3. Remove the rear cover by pulling the cover towards you. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-5 Figure 3-2 Removing the Rear Cover ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-6 Removing and Replacing FRUs 3.1.3 Removing the Top Cover Remove the top cover as follows: 1. Remove the rear cover (Section 3.1.2). 2. Tilt the top cover up and slide it toward the rear of the monitor. (Figure 3-3). Figure 3-3 Removing the Top Cover ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-7 3.2 Field Replaceable Units (FRUs) The VR326 monitor FRUs are shown in Figure 3-4. The video assembly may look different in newer models. WARNING Turn the power off and disconnect the power cord from the wall outlet before disconnecting or replacing any FRU. Figure 3-4 VR326 Field Replaceable Units ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-8 Removing and Replacing FRUs 3.2.1 Removing the Interconnect Cable Remove the rear cover (Section 3.1.2) and unplug the interconnect cable. Refer to (Figure 3-5)) for the plug locations. FRU Connector Interconnect Cable Plug Power supply (right) J1 P1 ! Video assembly (center) J2 P2 " Deflection module (left) J3 P3 # Figure 3-5 Removing the Interconnect Cable ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-9 3.2.2 Removing the Power Supply Module Remove the power supply module as follows: 1. Remove the rear cover (Section 3.1.2), the top cover (Section 3.1.3), and the interconnect cable (Section 3.2.1). 2. Disconnect the 3-wire, 5-pin on/off switch cable (P4) from the connector (J4) at the top of the power supply module by pressing the tab on top of the connector (Figure 3-6). 3. Disconnect the 2-wire, 2-pin degauss cable (P10) from the connector (J10) on the power supply module by pressing the tabs on the sides of the plug (Figure 3-6). ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-10 Removing and Replacing FRUs Figure 3-6 Removing Cables from the Power Supply ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-11 4. Loosen the captive screw that holds the power supply to the chassis (Figure 3-7). 5. Slide the power supply module out of the card guides. Figure 3-7 Removing the Power Supply Module ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-12 Removing and Replacing FRUs 3.2.3 Discharging the CRT and Removing the Anode Cap Discharging the CRT drains to ground any leftover voltages that remain in the extra-high tension (EHT) cable after power is removed. Discharge the CRT as follows: 1. Remove the rear cover (Section 3.1.2) and the top cover (Section 3.1.3). WARNING The following steps expose you to the CRT anode, which may store a high voltage. Keep your free hand away from any part of the monitor during the anode discharge process. 2. Attach the clip end of the anode discharge tool (PN 29-24717-00) to a chassis ground point near the CRT anode. 3. Using one hand, carefully slip the anode discharge tool under the CRT anode connector cup until it touches the connector prongs. Maintain contact for at least 10 seconds. NOTE Be careful when you use the anode discharge tool. Do not tap the CRT. Avoid scratching or marring the CRT glass when you insert or remove the tool. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-13 4. Remove the CRT anode cap from the CRT (Figure 3-8). Figure 3-8 Discharging the CRT and Removing the Anode Cap ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-14 Removing and Replacing FRUs 3.2.4 Removing the Deflection Module Remove the deflection module as follows: CAUTION Use a static protection kit (PN 29-26246-00) when handling the deflection module. 1. Remove the rear cover (Section 3.1.2), the top cover (Section 3.1.3), and the interconnect cable (Section 3.2.1). 2. Discharge the CRT and remove the anode cap (Section 3.2.3). WARNING You must discharge the CRT before removing the anode. 3. Loosen the captive screw that holds the deflection module to the chassis (Figure 3-9). 4. Disconnect the 1-wire, 3-pin G2 cable (P7) from the connector (J7) on the left side of the video assembly by pressing on the sides of the connector and pulling. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-15 Figure 3-9 Unplugging the Deflection Module Cables ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-16 Removing and Replacing FRUs 5. Disconnect the 6-wire, 9-pin raster control cable (P6) from the connector (J6) ! (Figure 3-10). 6. Disconnect the 4-wire, 9-pin CRT/Yoke cable (P11) from connector (J11) ". 7. Remove the Focus cable from the bracket assembly above the video assembly and disconnect the cable (P8) from (J8) #. Figure 3-10 Disconnecting Cables from the Deflection Module ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-17 8. Slide the deflection module out of the card guides (Figure 3-11) being careful to move any cables out of the way. Figure 3-11 Removing the Deflection Module ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-18 Removing and Replacing FRUs 3.2.5 Removing the Video Assembly Remove the video assembly as follows: 1. Remove the rear cover (Section 3.1.2), the top cover (Section 3.1.3), and the interconnect cable (Section 3.2.1). 2. Disconnect the 1-wire, 3-pin G2 cable (P7) from the connector (J7) to the left of the video assembly (Figure 3-12). (The Video Assembly may look different in newer models.) 3. Disconnect the 8-wire, 8-pin brightness/contrast cable (P5) from the connector (J5) at the bottom of the video assembly by pressing the top center tab on the connector. Place it out of the way behind the video assembly. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-19 Figure 3-12 Removing Cables from the Video Assembly ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-20 Removing and Replacing FRUs 4. Remove the Focus cable from the bracket assembly above the video assembly and disconnect the cable (P8) from (J8). 5. If present, pry the shield off the video assembly with a flat-blade screwdriver (Figure 3-13). Figure 3-13 Removing the Shield from the Video Assembly ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-21 6. Pull the CRT socket connector straight toward you and off the pins (Figure 3-14). CAUTION Use care not to bend the pins when you disconnect the CRT socket from the neck of the CRT. Figure 3-14 Removing the CRT Socket Connector ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-22 Removing and Replacing FRUs 7. Loosen the captive screw at the top of the video assembly (Figure 3-15). 8. Gently pull the top of the video assembly towards you and lift it up and out of the chassis. Figure 3-15 Removing the Video Assembly ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-23 CAUTION When you install the video assembly, carefully push the CRT socket connector onto the CRT neck. Use care not to bend the pins during this procedure. 3.2.6 Removing the CRT/Bezel/Chassis Assembly Remove the CRT/Bezel/Chassis assembly as follows: 1. Remove the rear cover (Section 3.1.2), the top cover (Section 3.1.3), and the interconnect cable (Section 3.2.1). 2. Remove the power supply module (Section 3.2.2) 3. Discharge the CRT and remove the anode cap (Section 3.2.3). WARNING You must discharge the CRT and remove the anode cap (Section 3.2.3) before removing the deflection module. 4. Remove the deflection module (Section 3.2.4) 5. Remove the video assembly (Section 3.2.5) NOTE After removing these FRUs, the CRT/Bezel/Chassis assembly is all that remains to be removed. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-24 Removing and Replacing FRUs 3.3 CRT Disposal (Trained Service Personnel Only) This section describes how to safely dispose of the monitor cathode-ray tube (CRT). CRTs are glass vacuum tubes. Because air pressure outside the tube is greater than air pressure inside, there is always the possibility of accidental implosion. WARNING You must handle CRTs very carefully to avoid accidental implosion and shattering glass. Use the following guidelines and disposal procedure to remove and dispose of a CRT. These guidelines and procedure are Digital policy for all CRTs more than three inches in diameter. NOTE This procedure supersedes all other "tech tips" about replacing and disposing of CRTs. This procedure is for Digital personnel only, and is not intended for use by OEM and self-maintenance customers. Location Work in areas where risks and exposure are limited to trained Digital personnel. Only Digital personnel should be in the area while removing and replacing a CRT. Handling a CRT · Never handle the CRT by the neck. Always use two hands and hold the CRT by the sides near the face. CRT's build a charge even while idle. · Keep the CRT away from your body during handling. · Do not let the neck strike anything. · Do not rest the CRT on its neck. · Do not let the CRT touch any tools, such as screwdrivers and soldering irons. Stocking and Storage All CRTs must be kept in a closed container or mounted in the device cabinetry. CRT Disposal Use the following procedure to safely dispose of CRTs. Always perform this procedure at a Digital facility. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-25 WARNING Do not dispose of any CRT until it is rendered inoperative and safe to dispose. Never perform the following disposal procedure at the customer site. Return the defective CRT to the local Digital facility for disposal. At the Digital facility you must: · Clear the area of nonessential personnel. · Have a second person in the area in case of emergency. · Wear safety goggles (PN 29-16141-00). · Wear gloves (PN 29-16146-00). · Use pliers. WARNING To avoid injuring your eyes or hands, always wear goggles and gloves when you work with a CRT. Never handle pieces of phosphor-coated glass without wearing protective gloves. 1. Remove the FRUs listed in Section 3.2.6. 2. Place the old CRT/Bezel/Chassis assembly and the original packing material in the container from which you removed the new CRT/Bezel /Chassis assembly. 3. Using pliers, slowly crush, but do not snap, the evacuation point (Figure 3-16). Do not move or disturb the CRT until the hissing sound of in-rushing air has stopped. CAUTION Use care not to break the unprotected glass area of the CRT neck that surrounds the evacuation point. NOTE The evacuation point is a protrusion that extends from the circular area defined by the CRT neck pins. The glass protrusion is sometimes encased in a protective plastic cap, and more force is required to crush it. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-26 Removing and Replacing FRUs Figure 3-16 Crushing the Evacuation Point 4. Seal the carton with packing tape and dispose of it in the Digital site's trash receptacle. NOTE The safe removal of air from the CRT is necessary to prevent safety problems that may arise from accidental CRT implosion. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Removing and Replacing FRUs 3-27 3.4 Tilt-Swivel Base Helpful Hint: During normal use the tilt-swivel base should not come off the unit. There is a retainer plug in the center of the swivel retainer (74-39791-01) to hold the base on. If the tilt-swivel base should come off and the retainer teeth are not broken, you do not have to take the monitor apart. Use the following procedure to put the tilt-swivel base back on the monitor. 1. Place the monitor, screen side down, on a soft pad. 2. Align the tilt-swivel base with the wider part downward toward the screen (Figure 3-17). 3. Place a curved tool, like a long hex-head wrench, through the center of the swivel retainer inside the base. 4. While pressing on the base with one hand, pull the swivel retainer toward the base until the retainer 's teeth click into position. 5. Install a retainer plug (74-41176-01) in the retainer to keep the teeth apart. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 3-28 Removing and Replacing FRUs Figure 3-17 Tilt-Swivel Base ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 4 Aligning the Video Monitor ------------------------------------------------------------ 4.1 Introduction This chapter describes the monitor alignment procedures. Depending on which FRU has been replaced and the symptom indicated by the customer, perform the procedures for that part. NOTE If a customer calls with a display quality type of problem, ask the customer to leave the monitor on until you arrive to minimize the warm-up time. For these procedures, you need the following equipment: · Metric measuring tape (PN 29-25342-00) · 19XE radiance meter · Video screen cleaner (PN VT3XX-SC) · Low-tack adhesive tape (not provided) · Red china pencil (not provided). Check the adjustments in the order presented, as the success of one adjustment may depend on the accuracy of the preceding adjustments (except the Focus and G2 adjustments). If a setting is already correct, you can skip that adjustment and go on to the next one. 4-1 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 4-2 Aligning the Video Monitor 4.1.1 Before You Start You must use specific alignment screens to make adjustments. The alignment screens are shown in Appendix A. Refer to your host system service guide to set up these screens. Clean the Screen Clean the screen using a soft tissue or cloth and a non-abrasive, nonflammable glass cleaner, or use Digital's video screen cleaner (PN VT3XX-SC). Remove the Monitor Covers Before you perform any adjustments, set up the monitor as follows: 1. Place the monitor on a nonconductive surface. 2. Remove the rear cover (Section 3.1.2) 3. Remove the top cover (Section 3.1.3). 4. Rotate the monitor so it faces east. 5. Reconnect the video cable. 6. Reconnect the power cord. 4.1.2 Warm-Up Time If you replaced any FRU, refer to Section 4.1.4; otherwise, turn the power on and wait for a raster video pattern. If the customer had the system on when you arrived, after you remove the rear cover and reconnect the power cord, only a 5 minute warm-up is needed to check the monitor. Otherwise, let the monitor warm up for at least 20 minutes before performing any adjustments. The warm-up time ensures that the electron gun is at a stable temperature before you do any adjustments. 4.1.3 LEDs and Heater Filament Visually check the monitor to ensure that the following components are on: · LED on the power switch · LED on the deflection module · CRT heater filament. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Aligning the Video Monitor 4-3 4.1.4 Video Screen Alignment Preparation Use a metric measuring tape to measure the dimensions on the screen display. To avoid scratching the screen with the tape's metal clip, start the measurement at the 10 cm. mark on the tape. See Figure 4-1. Use low-tack adhesive tape to mark off positions on the bezel window as follows: 1. Horizontal and vertical center position 2. Right and left side, 265 mm apart, centered approximately at the horizontal-vertical center position (Figure 4-1) Figure 4-1 Mark Center, Left, and Right Sides of Video Screen ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 4-4 Aligning the Video Monitor 4.2 Using the Radiance Meter Use the radiance meter as follows: 1. Remove the cap from the radiance meter sensor head and connect the occluder to the radiance meter (Figure 4-2). CAUTION Avoid excessive force when tightening the occluder or you may damage the radiance meter. Do not touch the exposed filter after the protective cap is removed. 2. Connect the ac line adapter to the radiance meter and plug it into a wall outlet. Figure 4-2 Radiance Meter ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Aligning the Video Monitor 4-5 3. Turn the power on. NOTE Do not use the POWER ON W/BACKLIGHT position when you are using the radiance meter with batteries. 4. Ensure that your radiance meter is in calibration. Set the range switch to the second position from the top (1.999). 5. Place the occluder firmly against the center of the screen (Figure 4-3). Use a red china pencil to draw a circle around the occluder. NOTE You must take all meter readings with the meter centered in this circle. Figure 4-3 Using the Radiance Meter ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 4-6 Aligning the Video Monitor 4.3 Monitor Adjustments The location of the internal controls and adjustments are shown in Figure 4-4. If possible, position yourself so the screen is on your left and the adjustments are on your right. 4.3.1 Before Applying Power If the Deflection Board has been replaced... Perform steps 1 and 2; otherwise, go to step 3. 1. Mark off the screen as described in Section 4.1.4. 2. Set the G2-SCREEN control to minimum (fully CCW). If the Video Board has been replaced... Perform steps 3 through 5; otherwise, continue with step 6. 3. Set the R CUTOFF and B CUTOFF adjustments at their midpoints. 4. Set the R GAIN, G GAIN, and B GAIN adjustments at their midpoints. 5. On the deflection board: a. Set the G2-SCREEN control to minimum (fully CCW). b. Set the SERVICE switch to the Normal position. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Aligning the Video Monitor 4-7 Figure 4-4 Adjustment Locations ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 4-8 Aligning the Video Monitor Set User Controls... 6. Set the CONTRAST control to minimum (CCW). 7. Set the BRIGHTNESS control to maximum (CW). 8. Set the HORIZONTAL CENTERING and VERTICAL CENTERING thumbwheels at their mid-points (detents). 9. Turn the power on. Figure 4-5 User Controls ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Aligning the Video Monitor 4-9 4.3.2 Geometry Adjustments If the deflection board has been replaced, adjust the geometry of the display as follows. Unless otherwise noted, all adjustments are performed on the deflection board. 1. Slowly turn CW (G2-SCREEN) until a raster with white horizontal retrace lines displays. 2. Now back off G2 just until only the white horizontal retrace lines disappear. The resulting raster display should be light gray with no visible retrace lines. Figure 4-6 G2-Screen and Focus Adjustment Locations ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 4-10 Aligning the Video Monitor 3. Adjust WIDTH fully CCW for minimum raster width. 4. Adjust HLIN so that the left edge of the raster is at maximum width. (You may have to adjust HCEN to see the left edge of the raster.) 5. Now back off HLIN to reduce the left edge of the raster by approximately 5 mm. 6. Adjust HCEN to center the raster in the CRT glass. If needed, decrease the WIDTH adjustment so that both edges of the raster are visible. 7. Set the CONTRAST control to maximum. 8. Display the Circle/Crosshatch video pattern and, while observing an area at the center of the screen, adjust FOCUS. 9. Adjust VCEN so that the pattern is vertically centered in the bezel. 10. Adjust HEIGHT so that the top and bottom lines of the pattern are 199 mm apart. 11. Adjust VLIN so that the height of all squares on the center vertical axis, from top to bottom, are equal. 12. Adjust HPHASE so that the center vertical line of the pattern is aligned with the adhesive tape marking the horizontal-vertical center reference position. 13. Adjust WIDTH so that the right side of pattern is aligned with the marked right side reference position. 14. Adjust HLIN so that the left side of the pattern is aligned with the marked left side reference position. 15. Adjust TRAP so the viewing area of the screen does not form a trapezoid (top edge smaller or larger than bottom edge). 16. Adjust PIN so the sides do not bow in or bow out. 17. Go back to step 12 and repeat this procedure until all three positions are aligned with the reference positions. 18. Remove the reference adhesive tape from the screen. With a suitable cleaner, remove any marks or residual adhesive from the screen. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Aligning the Video Monitor 4-11 4.3.3 Focus Adjustment Display a convenient focusing pattern, such as an ``All Es'' pattern or the Circle/Crosshatch video pattern and proceed as follows: 1. Set the CONTRAST control to minimum (CCW). 2. Adjust the BRIGHTNESS control to raster extinction. 3. Set the CONTRAST control to maximum. 4. While observing the upper-left corner of the screen, adjust FOCUS. Figure 4-7 Adjustment Locations ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 4-12 Aligning the Video Monitor 4.3.4 Cutoff Adjustments If the video board has been replaced, adjust the cutoff controls as follows. Unless otherwise noted, all adjustments are performed on the video board. 1. Set R CUTOFF and B CUTOFF adjustments fully CCW. 2. Set R GAIN, G GAIN, and B GAIN adjustments fully CCW. 3. Position the radiance meter in the middle of the screen. 4. On the deflection board, slowly turn CW (G2-SCREEN) for 0.0046 reading on the radiance meter. The resulting raster should be green in color with no horizontal retrace lines. 5. Adjust the BRIGHTNESS control to minimum. 6. On the deflection board, set the SERVICE switch to ``Service'' position. 7. Adjust the BRIGHTNESS control just until a single green horizontal line appears. CAUTION Do not over adjust; a very bright line may permanently burn the screen. 8. Adjust the BRIGHTNESS control just until the green horizontal line disappears. Do not adjust the BRIGHTNESS control for the remainder of this Cutoff Control adjustment procedure. 9. Turn CW (R CUTOFF) just until a single red horizontal line appears. CAUTION Do not over adjust. 10. Adjust R-CUTOFF just until the red horizontal line disappears. 11. Turn CW (B CUTOFF) just until a single blue horizontal line appears. CAUTION Do not over adjust. 12. Adjust B CUTOFF just until the blue horizontal line disappears. 13. On the deflection board, set the SERVICE switch to Normal position. ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Aligning the Video Monitor 4-13 14. If the previous adjustments are correct, the screen should be totally black with an absence of raster. If not, repeat Section 4.3.4 until the screen is black. Figure 4-8 Cutoff Adjustment Locations ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 4-14 Aligning the Video Monitor 4.3.5 Color/White Balance Adjustments If the video board has been replaced, adjust the color and white balance as follows. Unless otherwise noted, all adjustments are performed on the video board. 1. Adjust the CONTRAST control to minimum. 2. Adjust the BRIGHTNESS control to raster extinction. 3. Set the CONTRAST control to maximum. 4. Position the radiance meter in the middle of the screen and complete steps 5 through 8 in the next table. Repeat steps 5 through 8 until you achieve the final check of approximately 0.451 meter reading. ------------------------------------------------------------ Step Display Video Pattern... Adjust... Turn Radiance Meter Reading... ------------------------------------------------------------ 5. Red-50%-Central-Rectangle R GAIN CW 0.135 6. Green-50%-Central-Rectangle G GAIN CW 0.159 7. Blue-50%-Central-Rectangle B GAIN CW 0.159 8. White-50%-Central-Rectangle - - 0.451 (final check) ------------------------------------------------------------ 9. Repeat the FOCUS adjustment (Section 4.3.3). ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Aligning the Video Monitor 4-15 Figure 4-9 Gain Adjustment Locations ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ A Alignment Screens ------------------------------------------------------------ This appendix describes the screen patterns used to diagnose color and deflection problems, as well as to perform deflection, color checks, and adjustments. A.1 Circle-Crosshatch Pattern Use the circle-crosshatch pattern (Figure A-1) for all your alignment tests. Use this pattern as a reference for customers who work primarily with graphic applications. Figure A-1 Circle-Crosshatch Pattern A-1 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ A-2 Alignment Screens A.2 All-White Pattern Use the all-white pattern (Figure A-2) to check for the correct setting of the horizontal and vertical controls. Figure A-2 All-White Pattern ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Alignment Screens A-3 A.3 Central Rectangle Pattern Use the red, green, and blue central rectangle pattern (Figure A-3) when performing the gain adjustments. Figure A-3 Central Rectangle Pattern ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ A-4 Alignment Screens A.4 All ``Es'' Pattern Use the screen of ``Es'' (Figure A-4) as a secondary reference for customers who work primarily with text. Figure A-4 All ``Es'' Pattern ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Alignment Screens A-5 A.5 Color Bars I Pattern You can use this 4-bar color pattern (Figure A-5) to check for the presence of all colors, and to check if the colors are in the correct order. Figure A-5 Color Bars I Pattern A.6 Color Bars II Pattern You can use this 8-bar color pattern (Figure A-6) to check for the presence of all colors, and to check if the colors are in the correct order. Figure A-6 Color Bars II Pattern ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ B VR326 Specifications ------------------------------------------------------------ The following are the physical specifications for the VR326 color monitor. Table B-1 Monitor Physical Specifications ------------------------------------------------------------ Specifications Value ------------------------------------------------------------ Height 38 cm (15 in) Width 38 cm (15 in) Depth 39.6 cm (15.6 in) Weight 17.2 kg (38 lbs) Tilt range 20° (5° forward to 15° backward) Swivel range ±90° (left and right) Cathode ray tube (CRT) 38 cm (15 in) diagonal Display area 1024 pixels horizontal x 768 lines vertical. Approximate picture size = 199 mm (7.8 in) x 265 mm (10.4 in) with a 4:3 aspect ratio. ------------------------------------------------------------ B-1 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ B-2 VR326 Specifications The following are the electrical requirements for the VR326 color monitor. Table B-2 Monitor Electrical Requirements ------------------------------------------------------------ Requirement Value ------------------------------------------------------------ AC input voltage 90 to 128 Vac or 190 to 256 Vac, auto-ranging, single phase, 3-wire Line frequency 49 to 61 Hz Power consumption 240 watts maximum Video timing See Table B-4. Video output 53.5% nominal (light transmissivity) Video input Red (with sync) 1 Vpp, 75 ohm, ac or dc coupled Green (with sync) 1 Vpp, 75 ohm, ac or dc coupled Blue (with sync) 1 Vpp, 75 ohm, ac or dc coupled ------------------------------------------------------------ The following are the environmental specifications for the VR326 color monitor. Table B-3 Monitor Environmental Specifications ------------------------------------------------------------ Specifications Value ------------------------------------------------------------ Operating temperature 10° to 40° C (50° to 104° F) Humidity 10% to 90% relative humidity Maximum wet bulb = 28° C Minimum dew point = 2° C (noncondensing) ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ VR326 Specifications B-3 Table Table B-4 lists the horizontal and vertical timing specifications. Table B-4 Video Timing--1024 x 768 Resolution ------------------------------------------------------------ Horizontal frequency 57.384 kHz Vertical frequency 72.033 Hz Pixel frequency 74.370 MHz Pixel period 13.446 ns ------------------------------------------------------------ Horizontal Timing no. pixels µs ------------------------------------------------------------ Entire line 1296 17.43 Active visible line 1024 13.77 Blanking interval 272 3.66 Sync front porch 16 0.215 Sync pulse 128 1.721 Sync back porch 128 1.721 ------------------------------------------------------------ Vertical Timing no. lines ms ------------------------------------------------------------ Vertical period (entire frame) 797 13.889 Visible raster 768 13.384 Blanking interval 29 0.505 Sync front porch 1 0.0174 Sync pulse 6 0.1046 Sync back porch 22 0.3834 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ C VR326 Documentation ------------------------------------------------------------ In addition to this guide, you can order the following VR326 documents from Digital. Some of the documents listed are available in several languages. Please contact your sales representative for availability and more information. Installing and Using the VR326 Color Monitor EK-VR326-IN This guide provides users with the information needed to install, operate and maintain the VR326 monitor. The manual also describes all controls and indicators. VR326 Color Monitor IPB EK-VR326-IP This document provides a detailed parts breakdown of the VR326 field replaceable parts. The documents do not contain part numbers for components on the printed circuit modules. However, these components are listed in the Field Maintenance Print Set, ordered separately. VR326 Field Maintenance Print Set MP-03005-01 This document provides a field maintenance set of electrical and mechanical schematic diagrams for the VR326 color monitor. C-1 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Index ------------------------------------------------------------ A AC input voltage, B-2 Adjustments B CUTOFF, 4-6, 4-12 B GAIN, 4-6 blue, 4-15 BRIGHTNESS, 4-6, 4-8, 4-11, 4-12 CONTRAST, 4-8, 4-11 FOCUS, 4-11 G2-SCREEN, 4-6, 4-9, 4-12 GAIN, 4-14, 4-15 geometry, 4-9 G GAIN, 4-6 green, 4-15 HCEN, 4-10 HLIN, 4-10 HPHASE, 4-10 PIN, 4-10 R CUTOFF, 4-6, 4-12 red, 4-15 R GAIN, 4-6 TRAP, 4-10 VCEN, 4-10 VLIN, 4-10 white balance, 4-14 WIDTH, 4-10 Alignment procedure, 4-1, 4-7 screens all Es, A-4 all-white pattern, A-2 central rectangle pattern, A-3 Alignment screens (Continued) circle-crosshatch pattern, A-1 color bars patterns, A-5 red, green, and blue, A-3 All-white pattern, A-2 Anode discharge tool, 1-2, 3-12 removal, 3-12, 3-14 Audience, vii B Base retainer, 3-27 tilt-swivel, 3-27 B CUTOFF adjustment, 4-6, 4-12 B GAIN adjustment, 4-6 Blank screen without video but raster see Table 2-2. without video or raster see Table 2-1. Blue color missing, 2-6 BRIGHTNESS adjustment, 4-6, 4-8, 4-11, 4-12 Brightness/contrast cable, 3-18 C Cable brightness/contrast, 3-18 CRT/yoke, 3-16 focus, 3-20 Index 1 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 2 Index Cable (Continued) G2, 3-14 interconnect, 3-8 raster control, 3-16 removal, 3-2 Central rectangle pattern, A-3 Circle-crosshatch pattern, A-1 Cleaning the screen, 4-2 Color adjustments, 4-14 bars II pattern, A-5 I pattern, A-5 distortion color/white balance, 4-14 cutoff adjustments, 4-12 degauss button, 4-8 problems see Table 2-4. video input, B-1 CONTRAST adjustment, 4-8, 4-11 Conventions, vii CRT anode removal, 3-12, 3-14 dimensions, B-1 discharging procedure, 3-12 display area, B-1 disposal, 3-24 disposal procedure, 3-25 handling, 3-24 light transmissivity, B-1 socket connector, 3-21 stocking and storage, 3-24 CRT/chassis assembly northern hemisphere, 1-2 part number, 1-2 removal, 3-23 southern hemisphere, 1-2 Cutoff adjustment locations, 4-13 D Deflection module part number, 1-2 removal, 3-14, 3-17 Degauss button, 4-8 Dimensions, B-1 Discharging CRT, 3-12, 3-14 Display area, B-1 Disposing of CRT, 3-24, 3-25 Documentation IPB, C-1 print set, C-1 E Electrical requirements, B-2 Es pattern, A-4 F Field maintenance print set, C-1 Field replaceable units (FRUS), 3-7 Flicker, 2-10 Focus adjustment, 4-11 cable, 3-20 G G2 cable, 3-14, 3-18 G2-SCREEN adjustment, 4-6, 4-9, 4-12 Gain adjustments, 4-14, 4-15 Geometry adjustments, 4-9 G GAIN adjustment, 4-6 Gloves handling CRT, 3-25 part number, 1-2 Green color missing, 2-6 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Index 3 H Handling CRT, 3-24 HCEN adjustment, 4-10 HLIN adjustment, 4-10 HPHASE adjustment, 4-10 Humidity dew point, B-2 wet bulb, B-2 Hz, B-2 I Installing tilt-swivel base, 3-27 Interconnect cable part number, 1-2 removal, 3-8 L Light transmissivity, B-1 Line frequency, B-2 M Magnetic fields affect on monitor, 2-1 Metric measuring tape, 1-2 Model variations northern hemisphere, 1-2 southern hemisphere, 1-2 Monitor adjustments if deflection board is replaced, 4-6, 4-9 if video board is replaced, 4-6, 4-12 N Northern hemisphere CRT/chassis assembly, 1-2 model, 1-2 O Occluder, 4-5 Operating humidity, B-2 temperature, B-2 P PIN adjustment, 4-10 Plug, base retainer, 3-27 Poor display quality see Table 2-5. Power consumption, B-2 Power supply part number, 1-2 removal, 3-9 Print set, C-1 Product description, 1-1 R Radiance meter part number, 4-1 using, 4-4, 4-5 R CUTOFF adjustment, 4-6, 4-12 Rear cover removal, 3-4 Recommended spare part, 1-2 Red, green, and blue input, B-1 pattern, A-3 Red color missing, 2-6 Removing anode from CRT, 3-12, 3-14 cables, 3-2 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ 4 Index Removing (Continued) CRT/chassis assembly, 3-23 CRT socket connector, 3-21 CRT/yoke cable, 3-16 deflection module, 3-14, 3-17 FRUs, 3-1 interconnect cable, 3-8 power supply module, 3-9 raster control cable, 3-16 rear cover, 3-4 top cover, 3-6 video assembly, 3-18, 3-23 video assembly shield, 3-20 Resolution, B-1, B-2 Retainer, base, 3-27 R GAIN adjustment, 4-6 S Safety goggles handling CRT, 3-25 part number, 1-2 Schematics, C-1 Screen cleaner, 4-1 screen xs>cleaning, 4-2 Service switch normal position, 4-6 service position, 4-13 Southern hemisphere CRT/chassis assembly, 1-2 model, 1-2 Spare parts, 1-2 Specifications, B-1 Static protection kit, 1-2, 3-14 Storing CRT, 3-24 Switch service, 4-6, 4-13 Synchronization, loss of see (Table 2-3). T Tape adhesive, 4-1, 4-3 measuring, 4-1, 4-3 Temperature, operating, B-2 Terminal technician tool kit, 1-2 Test screens all Es pattern, A-4 all-white pattern, A-2 central rectangle pattern, A-3 circle-crosshatch pattern, A-1 color bars patterns, A-5 Tilt-swivel base installation, 3-27 range, B-1 retrainer, 3-27 Timing specifications, B-2 Tools and equipment gloves, 1-2 Top cover removal, 3-6 TRAP adjustment, 4-10 Troubleshooting before you start, 2-1 by symptom, 2-2 fault isolation, 2-1 procedures, 2-2 tables, 2-2 U User controls, 4-8 V VCEN adjustment, 4-10 Video input, B-1 resolution, B-1, B-2 timing, B-2 Video assembly part number, 1-2 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Index 5 Video assembly (Continued) removal, 3-18, 3-23 Video assembly shield removal, 3-20 Video casting assembly See Video assembly VLIN adjustment, 4-10 VR326 monitor adjustment locations, 4-7 aligning, 4-1 alignment screens, A-1 color adjustments, 4-7 description, 1-1 documentation, C-1 models, 1-2 specifications, B-1 troubleshooting, 2-2 user controls, 4-8 warm-up time, 4-2 W Warm-up time, 4-2 Watts, B-2 Weight, B-1 White balance adjustments, 4-14 WIDTH adjustment, 4-10 ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------