Post Diagnostic Test Descriptions - Xerox phaser 6250 Service Manual

POST Diagnostic Test Descriptions

Test
SDRAM
I/O ASIC
Memory
"i" Button
(Configuration
Chip)
Extended Memory
EEPROM
Ethernet
CPU Interrupts
USB
Real Time Clock
RAM DIMM
Presence
Minimum RAM
Limits
Maximum RAM
Limits
IDE Disk
Engine Command
Engine Fuser
Warmup
General Troubleshooting
Fault
Code Description
(Hard) This test fails if the boot loader finds no RAM
present or faulty RAM. (Run prior to POST.)
1
Boot loader posts the message "RAM error" to the front
panel and blinks the front panel LED.
(Hard) This test determines if the I/O chip is functioning
3
properly and also makes a preliminary check of front
panel functionality.
(Soft) Checks installed memory above diagnostics code
4
and data addresses.
Front panel displays "Memory" if a fault occurs.
(Hard) This test checks to see if the "i" button
(configuration chip) is present. If no chip is present the
5
test will fail and the front panel message "Please Install "i"
button" will display.
This test does a write compare test to each 32-bit word in
7
extended memory.
(Hard) This test checks addressing of the EEPROM.
10
(Hard) This test checks the ethernet core.
11
(Hard) This test checks that each interrupt source to the
12
CPU is functioning.
(Hard) This test checks that the USB core is functioning
13
properly.
(Soft) The real time clock is tested.
14
(Soft) This test examines bad or incompatible RAM
15
DIMMs.
(Hard) Checks that there is at least 128 Mbytes installed.
16
Front panel displays "Install More RAM" on failure.
(Soft) Checks that there is no more than 512 Mbytes
17
installed.
(Soft) Checks for presence of hard drive, then checks the
20
disk controller core, and runs a DIAGNOSE command on
the hard drive.
(Hard) Runs multiple engine commands to verify proper
22
operation. Displays "22:Reseat Controller Board" and
"Call Customer Support" on failure.
(Soft) Checks for normal fuser operation. Failure will result
26
in a red box on the StartPage with "Hardware Failure".
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