Xerox Phaser 6180MFP, Service Manual

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4-4 Phaser 6180MFP Multifunction Printer Service Manual
General Troubleshooting
POST Test Description
Test Chain Link Description
CodeROM 116-317 This test calculates the ROM checksum chip by
chip and compares it with the value stored in the
CodeROM itself.
Checksum error is in the main program ROM.
FontROM This test calculates the FontROM checksum chip
by chip and compares it with the value stored in
the FontROM itself.
116-310 Checksum error is in the built-in FontROM.
116-317 Checksum error is in the main program ROM.
EEPROM This test writes/reads/verifies on the diagnostic
area of the EEPROM.
116-323 Error is detected in EEPROM0 during
initialization.
116-326 Error is detected in EEPROM1 during
initialization.
DRAM This test checks OPEN/SHORT of the address
line of the DRAM. This test also writes/reads/
verifies on the entire DRAM.
116-315 Error is detected if included RAM is different.
116-316 Error is detected if extended RAM is different.
116-320 Error is detected if extended RAM is not
supported.
MAC+PHY Test 116-352
116-392
116-393
116-394 This test performs PHY internal loopback.
ASIC 116-343 Performs register test.
IOT 024-371 This test performs communication test with the
Engine.
This test also checks for communication failure
between the Engine and Controller.