General Troubleshooting 4-15
RAM Memory Fault Isolation
Image Processor Board RAM memory has failed or is not installed. A minimum of
128 MB of RAM must be installed for proper printer operation. The Phaser 5500
supports PC133 SDRAM in 144-pin SO-DIMM form. The printer accepts modules of
128, or 256 MB in combinations to a total of 512 MB.
Applicable POST Error Codes
Hardware Failure: RAM Memory Slot 1 Checksum
Hardware Failure:RAM Memory Slot 2 Checksum
Hardware Failure:RAM Memory Slot 1 Rejected
Hardware Failure:RAM Memory Slot 2 Rejected
Power On Self Test Error 4:Memory
Power On Self Test Error 15:RAM DIMM
Power On Self Test Error RAM ERROR
Initial Actions:
Check that the RAM devices aremaking positive contact with their connectors.
1. Power off the printer.
2. Remove and re-install the RAM memory after verifying it meets the Xerox
specifications. See "Memory Specifications" on page 1-11. If the problem
persists, use the following procedure to correct it.
POST RAM Memory Failure Troubleshooting Reference
Applicable Parts References
â– SDRAM Memory
â– Image Processor Board
â– Image Processor Board P/J Locator (page 10-14)
â– PL8.1 Print Engine Electrical (page 9-40)
POST RAM Memory Failure Troubleshooting Procedures
Step Actions and Questions Yes No
1
Power on the printer.
Is RAM ERROR displayed on the Front
Panel?
Go to Step 5. Go to Step 2.
2
Is POWER ON SELF TEST ERROR
4: MEMORY displayed on the Front
Panel?
Go to Step 5. Go to Step 3.
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