Xerox Phaser 7300B, Service Manual

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3-70 Phaser 7300 Color Printer Service Manual
POST Diagnostics Test Descriptions
POST Diagnostics Test Descriptions Table
Test Fault
Code
Description
SDRAM 1 (Hard Special) This test fails if the boot loader finds no
RAM present or faulty RAM.
Boot loader posts the message “RAM error” to the front
panel and blinks the front panel LED.
I/O ASIC 2 (Hard) This test determines if the I/O chip is functioning
properly.
Local Bus/
Front Panel 3 (Hard) Performed during the POST firmware initialization
phase.
If the front panel is not functioning, a hard fault is indicated
by the heath LED.
“i” Button
(Configuration
Chip)
5
(Hard) This test checks to see if the “i” button
(configuration chip) is present. If no chip is present the
test will fail and the front panel message “Please Install “i”
Button” will display.
Extended Memory 7 (Soft) (POST_TEST_DIMM1,2)
EEPROM 10 (Hard) This test checks addressing of the EEPROM.
Ethernet 11 (Hard) This test checks the ethernet core.
CPU Interrupts 12 (Hard) This test checks that each interrupt source to the
CPU is functioning.
USB 13 (Hard) This test checks that the USB core is functioning
properly.
Real Time Clock 14 (Soft) The real time clock is tested.
RAM DIMM
Presence 15 (Soft) This test checks for bad or incompatible RAM
DIMMs.
RAM Limits
16
(Soft) Checks that there is at least 128 Mbytes installed
and ignores more than 512 Mbytes.
L2 Cache 18 (Hard)
PCI Bridge 19 (Hard)
IDE Disk 20 (Soft) Checks the disk controller core, and runs a
DIAGNOSE command on the hard drive.
Parallel Port 21 (Soft)
Engine Command 22 (Hard)
Video DMA 23 (Hard)