Post Error Reporting - Xerox Phaser 8400 Service Manual

BIST Error Reporting Blink Pattern Definition Table (Continued)
PE LED PS LED
3 Rapid
blinking

POST Error Reporting

POST checks the communication paths within the electronics module and to other
various printer components.
POST testing initializes the Control Panel, and in most cases if an error occurs, a text
message is displayed on the Control Panel along with an LED blink code flashing on
all three LEDs (Control Panel LED, PS LED and PE LED). If initialization of the
Control Panel fails, POST errors will still report using the LED blink patterns. The
sum of the flashes equal the error code. If the code has more than 5 flashes, there is a
brief pause between each set of 5 flashes to make them easier to count. After all
flashes occur within the code, there is a long pause and then the flash pattern repeats.
"Soft" POST errors, that do not prevent the printer from powering up completely, are
displayed on the Control Panel for 5 seconds, and then the printer continues through
the remainder of POST. There are no rear panel LED codes associated with soft
errors. Most soft errors will cause the printer to print a Startup Page with the error
message on it.
Note
Before replacing the electronics module for any POST errors, do the
following:
1.
Unplug all wiring and/or cables to the electronics module.
2.
Plug in the AC power cable and power on the printer electronics module.
3. If the error blink pattern is now different from the original error reported before
Step 1, the problem may not be in the electronics module, (see "Miscellaneous
Electrical Troubleshooting" on page 4-65).
3-4
Description
Printer hangs during code initialization.
1. Unplug all cables from the electronics module.
2. Plug in the power cable.
3. Power on the electronics module (system).
4. If the problem still occurs, reseat the RAM DIMMs.
5. Replace the electronics module. For disassembly, see
"Electronics Module" on page 8-55. For replacement, go to
the Parts List on page 9-3.
Phaser 8400/8500/8550 Color Printer