Post Diagnostics Test Descriptions - Xerox 7300B - Phaser Color Laser Printer Service Manual

POST Diagnostics Test Descriptions

POST Diagnostics Test Descriptions Table
Test
SDRAM
I/O ASIC
Local Bus/
Front Panel
"i" Button
(Configuration
Chip)
Extended Memory
EEPROM
Ethernet
CPU Interrupts
USB
Real Time Clock
RAM DIMM
Presence
RAM Limits
L2 Cache
PCI Bridge
IDE Disk
Parallel Port
Engine Command
Video DMA
3-70
Fault Description
Code
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.
2 (Hard) This test determines if the I/O chip is functioning
properly.
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.
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.
7 (Soft) (POST_TEST_DIMM1,2)
10 (Hard) This test checks addressing of the EEPROM.
11 (Hard) This test checks the ethernet core.
12 (Hard) This test checks that each interrupt source to the
CPU is functioning.
13
(Hard) This test checks that the USB core is functioning
properly.
14 (Soft) The real time clock is tested.
15 (Soft) This test checks for bad or incompatible RAM
DIMMs.
16 (Soft) Checks that there is at least 128 Mbytes installed
and ignores more than 512 Mbytes.
18 (Hard)
19
(Hard)
20 (Soft) Checks the disk controller core, and runs a
DIAGNOSE command on the hard drive.
21
(Soft)
22
(Hard)
23 (Hard)
Phaser 7300 Color Printer Service Manual