Xerox Phaser 6600 Service Manual page 116

Error Troubleshooting
Press the OK button to return to the SFP Service Mode or MFP Printer Diag screen.
5.
6. Exit Service Mode. See "How to Exit Service Mode" on page 2-10.
Flash ROM Test
Flash ROM Test calculates the checksum per Flash ROM header area and compares the result with the
each area's checksum prepared in ROM. The status will be regarded as "normal" when the all results
coincide with the checksums stored in ROM.
Normal
CHECK OK
EEPROM Test
EEPROM Test allows you to execute read/write/verify of the test pattern (0xff, 0xaa, 0x55, 0x00) from
the head of the EEPROM for one byte in every 0 x 400.
Normal
CHECK OK
DRAM Test
DRAM Test checks whether the writing of the test data, 4-byte unit (0x00000000 -> 0x55555555 ->
0xaaaaaaaa -> 0xffffffff -> 0x00000000 -> ...), in the area available for the diagnosis is possible or not.
Values will be overwritten with the original value after the test.
Area available for the diagnosis: Work areas other than the stack area and the task acquiring area.
Normal
CHECK OK
MAC+PHY Test
MAC+PHY Test allows you to perform the loopback test for MAC (Media Access Control) and PHY
(Physical Layer).
Normal
CHECK OK
2-20 Phaser 6600 and WorkCentre 6605
Service Manual
Printer Diag
ESS Diag
Error
FlashROM ERROR xxxxxx
Error
EEPROM ID* ERROR (*: 1, 2)
Error
DRAM slot* ERROR (*: 0, 1)
Error
MAC+PHY ERROR
Xerox Internal Use Only