Xerox Phaser 8400 Service Manual

Service Manual 3-15
4,0XX.6x Process Control Software Fault
a. Reset NVRAM and then retest.
b. Ensure ground integrity for the printer (see "Ensuring Ground Integrity" on
page 4-77).
c. Replace the EEPROM chip.
d. Reboot the printer.
3
1. Remove the waste tray and printhead and
look for ink build-up in the printer.
2. Is there ink build-up anywhere in the printer?
Clean any ink or
debris which
may be
restricting
movement of
the drive train or
printhead.
Go to Step 4.
4
1. Check the process gearbox for damage.
2. Ensure the gears are correctly aligned (see
"Homing the Process Gear Drive Train" on
page 6-8).
3. Is the process gearbox damaged?
Replace the
process
gearbox.
Go to Step 5.
5
1. Check the X-axis motor connector for
damage.
2. Run the X-axis Motor test to check the
X-axis motor current.
3. Did the test fail?
Replace the X-
axis motor.
Go to Step 6.
6
1. Run the Tilt Drive test.
2. Did the test fail?
Replace the
process
gearbox.
Troubleshooting Procedure for 4,025 Error Code (Continued)
Step Questions and Actions Yes No

Xerox Phaser 8400 Specifications

General

Brand	Xerox
Model	Phaser 8400
Category	Printer
Language	English