Xerox Phaser 840 Service Manual page 54

Table 2-1 Main board power-up self-test error codes (cont'd.)
PS LED Meaning
flashes
Long flash =5
Short flash=1
2L+1S=11
8 not used
9 NVRAM
(Phaser 840
only)
10 EEPROM
11 Mariner ASIC
12 Medusa ASIC
13 Super Glue
ASIC
14 CL1284 IC
17 Ethernet chip
18 TEA error
(Phaser 850
only)
none SCSI
(Phaser 840
only)
none IDE hard drive
2 - 38 Phaser 840/850/860/8200 Color Printer - Service Manual
Details
This test does a walking 1s and a walking 0s test for that
last 4 bytes in the VxWorks section of the NVRAM.
This test reads in the first 24 bytes from the EEPROM then
verifies that the Tektronix Ethernet address 0x08, 0x00,
and 0x11 has been copied into three locations.
This test reads and verifies the version level of the Mariner
ASIC on the main board.
This tests reads and verifies the version level of the
Medusa ASIC on the main board.
This tests reads and verifies the version level of the Super
Glue ASIC on the main board.
This tests reads and verifies the version level of the
parallel port controller CL1284 chip on the main board.
This test verifies the existence of the Ethernet chip on the
main board.
The error occurs during power-up self tests when one of
the main devices previously enabled fails to respond,
unexpectedly causing a TEA. (Normal TEAs cause the
corresponding specific error.) This could be caused by
either the Code ROM or Main Board.
This test verifies the functionality of the SCSI I/O
processor. Any test failures with this component are
treated as non-fatal errors with the error information
written to the Startup Page. If a failure is detected, the
message "SCSI Option Card:" with one of the following
messages will be sent to the Startup Page.
Wrong values in script-set scratch registers.
I
Script operation timed-out.
I
Script operation returns wrong exit code.
I
DMA transfer spills outside buffer.
I
DMA transfer data mismatch.
I
This test verifies that the main board is able to
communicate with the IDE drive.