Xerox Phaser 8400 Service Manual page 81

Troubleshooting Procedure for 4,025 Error Code (Continued)
Step Questions and Actions
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?
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?
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?
6 1. Run the Tilt Drive test.
2. Did the test fail?
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.
Service Manual
Yes
Clean any ink or Go to Step 4.
debris which
may be
restricting
movement of
the drive train or
printhead.
Replace the Go to Step 5.
process
gearbox.
Replace the X- Go to Step 6.
axis motor.
Replace the
process
gearbox.
No
3-15