Field Service Ver. 2.0 Jul. 2009 22. IMAGE QUALITY PROBLEM
889
TROUBLESHOOTING
22.3.25 Printer monocolor: blank copy, black copy
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C518DA
Blank copy Black copy
Step Section Check item Result Action
1 Image check A blank copy occurs. YES Check PH unit connector for
proper connection.
2 Imaging unit Coupling of IU drive mechanism
is installed properly.
NO Check and correct drive
transmitting coupling.
Change IU.
3 The PC drum charge corona
voltage contact or PC drum
ground contact of the imaging unit
is connected properly.
NO Check, clean, or correct the con-
tact.
4 High voltage unit/
1
Connector is connected properly. NO Reconnect.
5 The problem has been eliminated
through the check of step 4.
NO Change high voltage unit/1.
o Change printer control board
o Change PH unit.
Y110571-1 Service Manual
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