Code :

Code: 937.40 ... 937.81
Description: Main drive motor assembly failure
Remedy: 1. Check all connections on the system card assembly. 2. Check all connections on the main drive motor assembly. 3. Replace the main drive motor assembly. Go to “Output cover assembly removal (T650, T652, T654)”. 4. Replace the system card assembly if problem remains.

Code: 950.xx
Description: NVRAM mismatch failure Mismatch between system card EEPROM and operator panel mirror. ".xx" codes: 00-29: mismatch between system and mirror 30-60: mismatch between secure and system
Remedy: 1 Check the operator panel assembly. Was the operator panel assembly recently replaced? Go to step 3. Go to step 2. Step Check Yes No 2-156 Service Manual 4062 2 Check the system card assembly. Was the system card assembly recently replaced? Go to step 4. Contact next level of support. 3 Replace the current operator panel assembly with the original operator panel assembly. Does the error remain? Go to step 5. Problem solved. 4 Replace the current system card assembly with the original system card assembly. Go to “System card assembly removal (T650, T652, T654, T656)”. Go to step 6. Problem solved. 5 If problem continues, replace the original operator panel assembly with a new and not previously installed operator panel assembly. Does the error continue? Contact the next level of support. Problem solved. 6 If the problem continues, replace the original panel assembly with a new and not previously installed operator panel door assembly. Go to “Operator panel door assembly removal (T650, T652, T654)”. Contact the next level of support. Problem solved.

Code: 952.xx
Description: NVRAM failure A recoverable MVRAM Cyclic Redundancy Check (CRC) error occurred.
Remedy: Power the machine off/on to reset the error condition.

Code: 953.xx
Description: NVRAM failure The NVRAM chip has failed on the operator panel door assembly.
Remedy: Replace the operator panel door assembly. Go to “Operator panel door assembly removal (T650, T652, T654)”. If problem remains, replace the fuser unit assembly. Go to “Fuser unit assembly removal (T650, T652, T654)”.

Code: 955.xx
Description: NVRAM failure The Code ROM or NAND flash failed the Cyclic Redundancy Check (CRC) check or the NAND experienced an uncorrectible multi-bit failure.
Remedy: Replace the system card assembly.

Code: 956.01
Description: System card processor over temperature The system card processor is over temperature or is damaged.
Remedy: Replace the system card assembly.

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