Troubleshooting - Xerox 7700DX - Phaser Color Laser Printer Service Manual

Troubleshooting

For Error Codes and Messages, refer to Diagnostics, Error Codes and
Messages on page 2-31.
The Phaser 7700 Printer has built-in diagnostics to aid in troubleshooting
problems with the printer. The Service Diagnostics Menu provides a means to
test sensors, motors and solenoids. Diagnostics also contains built-in test
prints, and calibration and cleaning procedures. For details on error codes,
messages and service diagnostics, Diagnostics, Error Codes and Messages
on page 2-31.
Note Before troubleshooting power supply problems,
disconnect the Auxiliary Feeder or Finisher, if installed,
and restart the printer. Verify the problem is still present
or refer to the appropriate Option troubleshooting
section.
This section is ordered as follows:
Troubleshooting Power Supplies and Interlocks
AC Power
Low-voltage Power Supplies [LVPS]
3.3 VDC and 5 VDC LVPS
24 VDC LVPS
24 VDC Interlock Circuit
5 VDC Interlock Circuit
System problems where the printer will not come to "Ready."
Printer does nothing when power is turned On
Fan on, Front Panel LED never On
Fan on, Front Panel LED on, no Front Panel message
Front Panel continually displays Xerox Phaser 7700 splash screen
Front Panel continually displays "WARMING UP"
Front Panel displays "FATAL FAULT ENCOUNTERED"
Phaser 7700 Color Laser Printer Service Manual 3-87