_ DEC-O-LOG for RA81X _ DOL, RA81X-M0002, SEP 83 PROBLEM: Internal LED Error Codes 34 and/or 35. CORRECTION: Reset the Phase Detector in the PLO with a power-up reset signal. This allows the oscillator to function properly. Note: This FCO implements ECO 54-15247-00009. IN-PLANT EFFECTIVITY: June 30, 1983 FIELD EFFECTIVITY: Retrofit all 60 Hz drives, serial numbers CX7850 and below, and 50 Hz drives, serial numbers CX4500 and below to the following Etch and CS Revisions: 54-15247 Etch: B CS: H The minimum acceptable revision of the module to be retrofitted in spares stock is: 54-15247 Etch: B CS: H QUICK CHECK: Presence of a wire from E102 Pin 10 to E133 Pin 11 on the Microprocessor Module 54-15247 The DEC on-site labor charge will be the time required to install and test the FCO at the then current hourly rate. FCO KIT ORDERING: EQ-04502-01: FCO, Prints FA-04502-02: FCO only FA-04502-03: PRINTS only _ DOL, RA81X-S0008, RA81X Drives MAY 85 PROBLEM: 1. The belt slips and falls off during the drive spin-up. This affects the 60HZ Drives only. Order and install Kit #1. 2. Excessive high-pitched noise (vibration) when the drive is spun-up in operating mode. Order and install Kit #1 for 60HZ drives or Kit #2 for 50HZ drives. IN-PLANT EFFECTIVITY: MAY 84 FIELD EFFECTIVITY: Retrofit RA81 Drives where problem symptoms are evident. The Drives affected include: 60hz CX37000 ns below and 50hz CX07300 and below. QUICK CHECK: Presence of BLACK TEFLON-COATED belt tension spring assembly on the motor actuator assembly (70-16724-01). The DEC on-site labor charge will be the time required to install and test the FCO at the then current hourly rate. FCO KIT ORDERING: EQ-01274-01: FCO, PARTS EQ-01274-02: FCO, PARTS FA-04543-01: FCO only _ DOL, RA81X-S0009, RA81X Drives JUN 85 PROBLEM: 1 - High rate of error codes 62 and/or 63. IN-PLANT EFFECTIVITY: DEC 83 FIELD EFFECTIVITY: Retrofit Drives where Problem/Symptoms are evident. The Drives affected are Serial Number CX30400 and below for 60hz and Serial Number CX6580 and below for the 50hz. QUICK CHECK: Presence of 0.1 mfd capacitor at location C29 and 38.3 ohm resistor at location R64. The DEC on-site labor charge will be the time required to install and test the FCO at the then current hourly rate. FCO KIT ORDERING: EQ-01275-01: FCO, PARTS FA-04544-01: FCO only _ DOL, RA81X-R0010, RA81X Drives MAR 85 PROBLEM: The AC harness P705 is being damaged by the Motor Brake Shaft. IN-PLANT EFFECTIVITY: SEP 84 FIELD EFFECTIVITY: Retrofit RA81 Drives per affected Serial Numbers. The Drives affected include" CX32001 and below for 60hz and CX6750 and below for 50hz.. QUICK CHECK: Presence of the cable tie attaching the P705 to the P502 Cable Clamp on the Logic Chassis Assembly. The DEC on-site labor charge will be the time required to install and test the FCO at the then current hourly rate. FCO KIT ORDERING: FA-04572-01: FCO only _ DOL, RA81X-R012, POTENTIAL ECC ERRORS-RA81X SEP 85 PROBLEM: Potential ECC errors on the RA81. QUICK CHECK: Adjustment should be performed on microprocessor modules with an etch Rev "C1", CS Rev "L3" or lower, and etch Rev "B", CS Rev "K" or lower. The DEC on-site labor charge will be the time required to install and test the FCO at the then current hourly rate. FCO KIT ORDERING: EQ-None required FA-04649-01 _ DOL, RA81X-I013, RA81 HDA ADHESIVE OCT 86 PROBLEM: The adhesive used to attach the gaskets to the spindle air filter assembly breaks down at the upper end of the drive operating specification. This causes head to disk interference to occur. FIELD EFFECTIVITY: If your HDA is marked "H1" or above, or has a serial number of CX 49250 or KB 6539 or above, THAT HDA IS GOOD AND DOES NOT NEED REPLACEMENT. RA 81 HDA's which are Revisions below "H1", or have serial numbers below CX 49250 or KB 6539, are subject to this FCO. QUICK CHECK: HDA Rev "H1" or S/N above CX 49250 or KB 6539 will have the adhesive removed from the air filter assembly and be a "GOOD" HDA. This revised FCO supersedes Revision B dated 05 June 1986. It has been revised to reflect changes in the Quick Check statement, the BOM in EQ Kit: EQ-01380-01, and the rework procedure of RA81X-I-014. FCO KIT ORDERING: EQ-01373-01 FCO, PARTS EQ-01373-02 FCO, PARTS FA-04656-01 FCO only _ DOL, RA81X-I014, RA81X GROUND PROBLEM OCT 86 PROBLEM: HDA Chassis and the Drive Chassis are at different Ground References. Data Errors (ECC) are not related to Media Defects. QUICK CHECK: Presence of a Ground Strap attached between HDA and the Power Supply Chassis Ground Strap. This revised FCO superesedes the Revision B dated 25 February 1986. It has been revised to reflect changes in the Quick Check statement the BOM, and the rework procedure. The DEC on-site labor charge will be the time required to install and test the FCO at the current hourly rate. FCO KIT ORDERING: EQ-01380-01 FCO, PARTS FA-04662-01 FCO only _ DOL, RA81X-I015, RA81 DISK APR 87 PROBLEM: 1. High rate of error code 62/63. 2. Intermittent or unexplained ECC errors. 3. Noisy 6 and 4 Volt Pre-Amp Supply Regulators. FIELD EFFECTIVITY: Retrofit all "H" Part Revision "C" Etch Rev Read/Write modules. Minimum stockable Revision for "C" Etch Module Minimum Part Revision is "J2". This FCO implements ECO 5415253-CX016. QUICK CHECK: Presence of 0.1 Mfd. Capacitor at location C29 and 0.1 Mfd. Capacitor at location C35. Read/Write module Rev "J" or higher. FCO KIT ORDERING: EQ-01472-01 FCO, PARTS FA-04761-01 FCO only _ DOL, RA81X-M016, RA81X DRIVES DEC 87 PROBLEM: The Arrowhart L5-30P power plug has insufficient clamping force to supply the amount of current needed to support a full cabinet configuration. The power cable is required to have 10 gauge wire instead of 12 gauge wire. FIELD EFFECTIVITY: This FCO only affects 60 HZ power controllers. Replace all 874-D Revision A, B, and C controllers in accordance with the following configurations: 1. Retrofit all RA81-CA/CE H9642 (Three High) Cabinet with any number of RA drive configuration. 2. Retrofit all RA81-DA/DE H9642 (Three High) Cabinet with any number of RA drive configurations. 3. Retrofit all RA81-EA/EE H9642 (Three High) Cabinet configurations. QUICK CHECK: RA81-CA/CE, DA/DE, EA/EE, Three High H9642 Cabinet contains power controller 874-D and is Revision "D" or higher. FCO KIT ORDERING: EQ-01473-01 FCO, PARTS FA-04762-01 FCO only