3-6 Phaser 5500 Printer Service Manual
POST Hard Fault Messages
POST indicates a hard fault by displaying a message on the Front Panel and blinking
the fault code on the health and Front Panel LEDs. There are long and short blinks. A
long blink is worth 5 and a short blink is worth 1. As an example, a blink pattern
flashed as long, long, short, short, represents fault code 5+5+1+1=12, indicating a
failure in the CPU interrupt test. Along with the blinking LEDs, the failed test also
appears on the display as:
POWER ON SELF TEST ERROR
12:CPU INTERRUPTS
CALL SERVICE
The exception to this reporting scheme is a RAM test error. The Boot Loader executes
a RAM test prior to loading POST. If the Boot Loader encounters a RAM error, the
Front Panel displays “RAM Error” and the health and Front Panel LEDs alternately
blink at 1/2-second intervals. POST does not load.
Hard Error LED Blink Patterns and Messages
LED Blink
Pattern
Front Panel
Message
Action
1 RAM ERROR No RAM present, or faulty RAM. Alternate 1/2 second
interval blink at Front Panel and health LEDs.
1+1+1 3: I/O ASIC Image Processor Board ASIC failure. Go to “Image
Processor Isolation” on
page 4-13.
1+1+1+1 4: MEMORY Checks installed memory: walking ones address, walking
one and complement data. Tests RAM memory above
diagnostics code and data addresses. Go to “RAM
Troubleshooting Procedure” on
page 4-15.
5+5 10: EEPROM 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 4-13).
5+5+1 11: ETHERNET
PHY
Image Processor Ethernet Port Failure.
Replace Image Processor Board (page 8-91).
5+5+1+1 12: CPU
INTERRUPTS
Replace Image Processor Board (page 8-91).
5+5+1+1+1 13: USB Image Processor USB port failure.
Replace Image Processor Board (page 8-91).
5+5+5+5+1+1 22: ENGINE
COMMAND
Communication with print engine has failed. Check the
connection to the Engine Logic Board, then go to “Image
Processor Isolation” on
page 4-13.