Post Diagnostic Test Descriptions - Xerox Phaser 4500 Service Manual

POST Diagnostic Test Descriptions

Fault
Test Code
SDRAM
Real Time
Clock
I/O ASIC
Memory
EEPROM
Ethernet
CPU Interrupts
USB
Real Time
Clock
RAM DIMM
Presence
Install more
RAM
Too much RAM
IDE Disk
Engine
Command
Real Time
Clock
3-18
Description
(Hard) This test fails if the boot loader finds no RAM
present or faulty RAM.
1
Boot loader posts the message "RAM ERROR" to the
front panel and blinks the front panel LED at an even rate.
(Soft) Synchronizes an internal counter to the rollover of
14
the seconds count in the Real Time Clock chip.
(Hard) This test determines if the I/O chip is functioning
3
properly.
(Hard) This test checks 64-bit reads and writes to
4
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) Ensures that the Real Time Clock is functionally
14
tested.
(Soft) This test examines bad or incompatible RAM
15
DIMMs.
(Soft) Checks that there is at least 64 MB of memory
16
installed and ignores more than 512 MB.
(Soft) Checks that there is no more than 512 Mbytes of
17
memory installed.
(Soft) Checks the disk controller core, and runs a
20
DIAGNOSE command on the hard drive.
(Hard) Checks communication between the Image
22
Processor Board and the HVPS/Engine Logic Board
(Soft) Checks to ensure that the seconds count in the Real
14
Time Clock chip is incrementing at one-second intervals
+/-2%.
Phaser 4500 Service Manual