Power On Self Test (Post) - Xerox Phaser 6500 Service Manual

General Troubleshooting

Power On Self Test (POST)

4-6
POST tests run when the printer is powered On. Errors are reported to the display.
1. Checks and initializes CRU Register.
2. Initializes ASIC.
3. Checks RAM.
4. Initializes the Control Panel driver.
5. Checks the ROM checksum.
6. Checks memory.
7. Initializes EEPROM driver.
8. Initializes IOT controller.
9. Starts the operating system.
POST Test Description
Test Error
CodeROM 116-317
FontROM
116-310
116-317
EEPROM
116-323
116-326
DRAM
116-315
116-316
116-320
MAC+PHY Test 116-352
ASIC 116-343
PANEL
IOT 024-371
Xerox Internal Use Only
http://www.manuals4you.com
Description
This test calculates the ROM checksum and
compares it to the value stored in CodeROM.
This test calculates the FontROM checksum
and compares it to the value stored in
FontROM.
Checksum error is in the built-in FontROM.
Checksum error is in the main program ROM.
This test verifies the EEPROM.
Error in EEPROM0 during initialization.
Error in EEPROM1 during initialization.
This test checks the DRAM.
Error if included RAM is different.
Error if extended RAM is different.
Error if extended RAM is not supported.
This test performs PHY internal loopback.
Runs register test.
This test checks Control Panel function.
This test Runs communication tests between
the print engine and controller.
Phaser 6500/WorkCentre 6505 Service Manual