_ FCO 9XXX-O009, Airflow/temp sensors register false trips ______________________________________________________________________________ | DIGITAL FCO CATEGORY PAGE 1 | | [O] OF 5 | |______________________________________________________________________________| | FIELD CHANGE ORDER NUMBER: 9XXX-O009 | |______________________________________________________________________________| | APPLICABILITY: This "O" coded FCO will replace the Air Flow Sensor and Motor| | Speed Control Sensor on the VAX 9000-2XX systems and the Air Flow Sensor on | | the VAX 9000-4xx systems. This FCO incorporates the following ECOs: | | 7026890-TW002, 7027528-TW002 and KA920-TW006. | |______________________________________________________________________________| | PROBLEM & SYMPTOM: Air flow/temperature sensors registers false trips when | | VBox option is installed. | |______________________________________________________________________________| | SOLUTION: 9000-2XX, replace 12-28780-05 with 12-28780-06, replace 12-28779-05| | with 12-28779-02. In the 9000-4XX, replace 12-28780-09 with 12-28780-11. | |______________________________________________________________________________| | QUICK CHECK: 9000-2XX look for 12-28780-06 and in the 9000-4XX look for | | 12-28780-11. | |______________________________________________________________________________| | PRE/COREQUISITE FCO: | MTTI HRS | | N/A | 1.5 hrs | | | | |___________________________________________________________________|__________| | TOOL/TEST EQUIPMENT: Field Service Maintenance Kit | | | | | |______________________________________________________________________________| | FCO PARTS INFORMATION | |______________________________________________________________________________| | FCO KIT NO. | DESCRIPTION OF CONTENTS | EQ KIT VARIATION | |______________|____________________________________________| APPLICABILITY | | EQ-01635-01 | 1 12-28780-06 Air Flow Sensor | | | | 1 12-28779-02 Motor Speed Control Sensor | N/A | | EQ-01635-02 | 1 12-28780-11 Air Flow Sensor | | | FA-04970-01 | 1 FCO Document | | |______________|____________________________________________|__________________| | FCO CHARGING INFORMATION | |______________________________________________________________________________| | WARRANTY/CONTRACT || NONWARRANTY/NONCONTRACT | |___________________________||_________________________________________________| | ON-SITE | OFF-SITE || ON-SITE | OFF-SITE | MATERIAL ONLY | |_____________|_____________||_____________|_____________|_____________________| |TRAVEL/| EQ | | EQ ||TRAVEL/| EQ | | EQ |ORDER-ADMIN,HANDLING | |INSTALL| KIT |INSTALL| KIT ||INSTALL| KIT |INSTALL| KIT |PKG,SHIPPING & EQ KIT| |_______|_____|_______|_____||_______|_____|_______|_____|_____________________| | DEC | DEC | DEC | DEC || N/A | N/A | N/A | N/A | N/A | |_______|_____|_______|_____||_______|_____|_______|_____|_____________________| | APPROVALS | |______________________________________________________________________________| | SPE | DSHQ LOGISTICS | DS PRODUCT SAFETY | | Alice Jacobson | Dick Joseph | Robert Brister | |___________________|____________________________|_____________________________| | SPE MANAGER |This document is published | FCO RELEASE DATE | | Dino Genova |on multiple media including | 29 January 1992 | |___________________|Customer Services and MDS |_____________________________| | MICROMEDIA |Microfiche Libraries. It is| FCO REVISION | | Diane MacDonald |also available electronic- | A | |___________________|all via the SSD CD-ROM and |_____________________________| | POPULATION |TIMA. | PARTS AVAILABILITY | | | | January, 1992 | |___________________|____________________________|_____________________________| _ _ _ _ _ _ _ | FCO 9XXX-O009 | | | | | | | | | |d|i|g|i|t|a|l| | PAGE 2 OF 5 |_|_|_|_|_|_|_| | | _______________________________|_________________________________________ Removal and Installation procedures for 9000-210 systems -------------------------------------------------------- 1. Shut down system and lock the system from the AC power source. 2. From the front of the cabinet, using a Phillips screwdriver, remove the two screws securing the plenum to the chassis. 3. Remove the plenum. 4. Disconnect the appropriate Mate-N-Lok connectors. The motor speed controller has two connectors. 5. Using the Phillips screwdriver, loosen the two 6-32 pan head screws (PN 90-06022-01) securing the sensor to the mounting assembly on each side. 6. Rotate and remove the 12-28779-05 and install EQ-01635-01 P/N 12-28779-02. On the other side remove the 12-28780-05 and install EQ-01635-01, P/N 12-28780-06. 7. Using the Phillips screwdriver, tighten the two 6-32 pan head screws securing the sensor to the mounting assembly on each side. 8. Connect the appropriate Mate-N-Lok connectors. The motor speed controller has two connectors. 9. Install the plenum. 10. Using the Phillips screwdriver, install the two screws securing the plenum to the chassis. 11. Report this FCO activity on the LARS form in the "Fail Area/ Module/FCO/Comments" column as follows: FCO 9XXX-O009 (See example on Page 4). Removal and Installation procedure for the 9000-4XX --------------------------------------------------- 1. Shut down system and lock the system from the AC power source. 2. At the base of the plenum, disconnect the two Mate-N-Lok connectors to the motor speed control sensor. 3. At the base of the plenum, disconnect the Mate-N-Lok connector to the air flow sensor. _ _ _ _ _ _ _ | FCO 9XXX-O009 | | | | | | | | | |d|i|g|i|t|a|l| | PAGE 3 OF 5 |_|_|_|_|_|_|_| | | _______________________________|_________________________________________ 4. If applicable, lift the power supply plenum up out of the way by pulling the release pin on each side of the power supply plenum. The power supply plenum will lock in place in the raised position. 5. Using a 3/8 inch box wrench, remove the two nuts that secure the base of the CPU plenum to the lower blower housing. 6. Using a 5/16 inch box wrench remove the two screws that secure the CPU plenum to the plenum mounting bar. 7. Remove the CPU plenum assembly. 8. Using a Phillips screwdriver, remove the three screws on each end of the plenum to remove the diffuser assembly from the bottom of the plenum. 9. Remove the air flow connector from the end of the diffuser assembly. 10. The air flow sensor is mounted on a bracket inside the diffuser assembly. Using a Phillips screw driver, loosen (do not remove) the two Phillips screws at the base of the air flow sensor. 11. Rotate the sensor base counterclockwise and remove the sensor (12-28780-09) from the sensor mounting panel. 12. Insert the sensor EQ-01635-02, P/N 12-28780-11 into the diffuser assembly so the Phillips screws already attached to the mounting bracket, pass through the opening in the sensor base. 13. Rotate the sensor base clockwise. 14. Using a Phillips screwdriver, tighten the two Phillips screws at the base of the air flow sensor. 15. Attach the air flow sensor connector to the opening in the end of the diffuser assembly. 16. Insert the diffuser assembly inside the base of the plenum and attach with three Phillips screws on each end. 17. If applicable, lift the power supply plenum up out of the way by pulling the release pin on each side of the power supply plenum. The power supply plenum will lock in place in the raised position. 18. Place the CPU plenum assembly in its mounting locations so the two bolts extending from the top of the blower housing pass through flanges on each side of the plenum base. _ _ _ _ _ _ _ | FCO 9XXX-O009 | | | | | | | | | |d|i|g|i|t|a|l| | PAGE 4 OF 5 |_|_|_|_|_|_|_| | | _______________________________|_________________________________________ 19. Using a 5/16 inch box wrench, install the two screws that secure the CPU plenum to the plenum mounting bar. 20. Using a 3/8 inch box wrench, install the two screws that secure the base of the plenum to the top of the blower housing. 21. At the base of the plenum, connect the Mate-N-Lok connector to the air flow sensor. 22. At the base of the plenum, connect the two Mate-N-Lok connectors to the motor speed control sensor. 23. Report this FCO activity on the LARS form in the "Fail Area/ Module/FCO/Comments" column as follows: FCO 9XXX-O009 LARS CATEGORY O USA GIA EUROPE Activity - (a)Contract and Warranty W U Y (b)IN-DEC Contract K U Hardware Segment Code 111 111 Non Contract/Non Warranty F F F (c)RTD/Off-site Agreement F U Product Line 031 DEC Option 9XXX 9XXX 9XXX Type of Call M M M Action Taken D D I Fail Area-Module-FCO-Comments 9XXX-O009 9XXX-O009 9XXX-O009 Material Used EQ-01635-0* EQ-01635-0* EQ-01635-0* (a) Warranty Optimum, Warranty Standard and Warranty Basic (on-site) Agreements; * Note material (only) free of charge for all customers. (b) Applies to IN-DEC Area Only (c) RTD=Return to Digital or Off-site Agreements; If Field Engineer On-site, use Activity Code "F". _ _ _ _ _ _ _ | FCO 9XXX-O009 | | | | | | | | | |d|i|g|i|t|a|l| | PAGE 5 OF 5 |_|_|_|_|_|_|_| | | _______________________________|_________________________________________ Figure 1 MR_X0414_90 Figure 2 MR_X0864_90.DOC \\FCO_DOCS \^ 9XXX \\9000-2XX \\9000-4XX \\1992 \^ 9XXX