Phaser 4500/4510 Service Manual 3-17
Error Messages and Codes
POST Diagnostic Test Descriptions
Test
Fault
Code Description
SDRAM
1
(Hard) This test fails if the boot loader finds no RAM
present or faulty RAM.
Boot loader posts the message “RAM ERROR” to
the control panel and blinks the control panel LED at
an even rate.
Real Time
Clock
14
(Soft) Synchronizes an internal counter to the
rollover of the seconds count in the Real Time Clock
chip.
I/O ASIC
3
(Hard) This test determines if the I/O chip is
functioning properly.
Memory
4
(Hard) This test checks 64-bit reads and writes to
memory.
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) Ensures that the Real Time Clock is
functionally tested.
RAM DIMM
Presence
15
(Soft) This test examines bad or incompatible RAM
DIMMs.
Install more
RAM
16
(Soft) Checks that there is at least 64 MB of memory
installed and ignores more than 512 MB.
Too much
RAM
17
(Soft) Checks that there is no more than 512 Mbytes
of memory installed.
IDE Disk
20
(Soft) Checks the disk controller core, and runs a
DIAGNOSE command on the hard drive.
Engine
Command
22
(Hard) Checks communication between the image
processor board and the HVPS/engine logic board
Real Time
Clock
14
(Soft) Checks to ensure that the seconds count in
the Real Time Clock chip is incrementing at one-
second intervals +/-2%.