Xerox 7750DXF - Phaser Color Laser Printer User Manual

General Troubleshooting 4-15
Front Panel Displays "Fatal Fault Encountered" Message
See the procedure for "Controller to Engine Communications Failure, Code 81" on
page 3-39.
Inoperable Printer Troubleshooting
False LH Door, RH Door, Front Door Open, or Imaging Units Missing
Messages
See the "Troubleshooting Power Supplies and Interlocks" on page 4-16.
For all of the Following Problems go to the Error Code Procedure "Tray
Lift Failure, Code 87" on page 3-41.
■ False "Load Paper in Tray [2,3,4,5]" Message
■ False "Tray [2,3,4,5] Missing" Message
■ Tray 2, 3, 4 or 5 will not lift or the printer will not recognize the auxiliary
feeder.
Printer Does Not Recognize the Finisher
The finisher is connected to the printer by a complementary pair serial data link. The
finisher also generates its own +5 VDC from +24 VDC supplied by the printer.
Troubleshooting Procedure
Step Actions and Questions Yes No
1
Check that the finisher is properly docked
with and connected to the printer.
Go to Step 2. Repair the
docking problem.
2
From the front panel check the Service
Diagnostics Test Table to see if the finisher
is recognized by the printer.
Reload the driver. Go to Step 3.
3
1. Remove the rear cover and board
cover from the finisher.
2. Check for presence of +24 VDC
between the finisher board P844-2 and
finisher frame ground.
Go to Step 4. Troubleshoot and
repair missing 24
VDC.
4
Turn off power and check the continuity of
the serial data link circuit by verifying
continuity between P531B-9 through –16
on the engine control board, and P843-1
through –8 on the Finisher Board.
Replace the
finisher board.
Replace the
engine control
board.

Xerox 7750DXF - Phaser Color Laser Printer Specifications

General

Brand	Xerox
Model	7750DXF - Phaser Color Laser Printer
Category	Printer
Language	English