Tektronix Phaser 840, Service Manual

Page: 41 / 207

30
Phaser 840 and 850 Color Printers
9 NVRAM
(Phaser 840
only) This test does a walking 1s and a walking 0s test for
that last 4 bytes in the VxWorks section of the
NVRAM.
10 EEPROM 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.
11 Mariner ASIC This test reads and verifies the version level of the
Mariner ASIC.
12 Medusa ASIC This tests reads and verifies the version level of the
Medusa ASIC.
13 Super Glue
ASIC This tests reads and verifies the version level of the
Super Glue ASIC.
14 CL1284 IC This tests reads and verifies the version level of the
parallel port controller CL1284 chip.
17 Ethernet chip This test verifies the existence of the Ethernet chip
on the main board.
18 TEA error
(Phaser 850
only) 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.)
none SCSI
(Phaser 840
only) 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.
■
Script operation timed-out.
■
Script operation returns wrong exit code.
■
DMA transfer spills outside buffer.
■
DMA transfer data mismatch.
none IDE hard
drive This test verifies that the main board is able to
communicate with the IDE drive.
Table 3 Main board power-up self-test error codes
Left LED
flashes
Long flash =5
Short flash=1
2L+1S=11
Meaning Details