Xerox PHASER 7500, Service Manual

Page: 514 / 992

5-30 Phaser 7500 Printer Service Manual
Print-Quality Troubleshooting
Cause (2nd)
• The LED Print Head round-tip pin is not in contact with the Imaging Unit ball
bearing.
• The gap between the Photoreceptor and the Developer is different at In and
Out.
Troubleshooting Procedure
Step Actions and Questions Yes No
1 Check whether the Imaging Unit
In/Out direction positioning is set
correctly.
Does the error still occur? Go to step 2. Troubleshooting
complete.
2 Check for any debris such as bits of
paper between the LED Print Head
and the Imaging Unit.
Does the error still occur? Go to step 3. Troubleshooting
complete.
3 Remove the Imaging Unit to check
if any debris are stuck to the ball
bearing surface (In/Out). Go to step 4. Troubleshooting
complete.
4 Check if any debris are stuck to the
tip of the LED Print Head round-tip
pin (Out).
Does the error still occur? Remove the
LED Print Head
Unit to check if
any debris are
stuck to the tip
of the LED
Print Head
round-tip pin
(In/Out). Troubleshooting
complete.