Xerox Phaser 4500 Service Manual page 96

Error Messages and Codes
3-18
POST Error Code Table
LED Blink Control Panel
Code Message
1 RAM ERROR
1+1+1 3: I/O ASIC
1+1+1+1 4: MEMORY
5+5 10: EEPROM
5+5+1 11: ETHERNET
PHY
5+5+1+1 12: CPU
INTERRUPTS
5+5+1+1+1 13: USB
5+5+1+1+1+1 14: REAL TIME
CLOCK
5+5+5 15: RAM
DIMM
5+5+5+1 16: INSTALL
MORE RAM
5+5+5+1+1 17:TOO MUCH
RAM
5+5+5+5 20: IDE DISK
5+5+5+5+1+1 22: ENGINE
COMMAND
Comment
No RAM present, or faulty RAM. Continuous 1/2
second interval LED blink.
Image processor board ASIC failure. Go to "Image
Processor Isolation" on page 4-33.
Checks installed memory: walking ones address,
walking one and complement data. Tests RAM
memory above diagnostics code and data
addresses. Go to "RAM DIMM Fault Isolation" on
page 4-35.
1. Switch off printer power.
2. Remove and re-install the NVRAM EEPROM.
3. Switch on printer power.
4. If the error message persists, first replace the
NVRAM EEPROM, then the image processor
board (Go to page 4-34).
Image processor E-Net port failure.
Replace image processor board (page 8-75).
Replace image processor board (page 8-75).
Image processor USB port failure.
Replace image processor board (page 8-75).
Image processor board timer failure. Remove and
reinstall the configuration card. If the problem
persists, replace the image processor board
(page 8-75).
RAM DIMM failure. Go to "RAM DIMM Fault
Isolation" on page 4-35.
Not enough valid memory installed to support
operation. Install additional RAM. Go to "RAM
DIMM Fault Isolation" on page 4-35.
Too much RAM can excessively load the processor
bus, causing system failure. Remove some RAM.
Go to "RAM DIMM Fault Isolation" on page 4-35.
Hard disk failure.
Replace the hard disk (part of image processor
removal on page 8-75).
Replace the image processor board (page 8-75).
Communication with print engine has failed. Check
ribbon cable to HVPS/engine logic board. Go to
"Image Processor Isolation" on page 4-33.
Phaser 4500/4510 Service Manual