Service manual

FrameMaker Ver5.5E(PC) CF3102/CF2002 TROUBLESHOOTING
02.06.13
T- 8 9
(15) Printer Monocolor: uneven density in FD
<Typical Faulty Images>
<Troubleshooting Procedure>
Section Step Check Item Result Action
Image
check
1 Uneven density of void area
occurs.
YES Check LPH Unit connector for
proper connection.
Check the LED Drive Board
connectors for proper connec-
tion.
High image
density
original
2 Uneven density in FD occurs
at a pitch of 40 mm to 50 mm
when a multi-copy cycle is run
usinganoriginalwithhigh
image density (50 % or more).
YES Feed 10 to 20 blank sheets of
paper with no originals
placed, as the IU fails to keep
up with a high demand for
toner.
LPH Assy 3 LED retracting lever is locked
in position.
NO Slide out the IU and reinstall.
IU 4 The surface of the PC Drum is
scratched.
YES Change IU.
5 Dirty on the outside. YES Clean.
LPH Assy 6 LED surface is dirty. YES Clean using the LED Cleaning
Jig.
Image
Transfer
Belt Unit
7 Cam gear operates properly. NO Change Image Transfer Belt
Unit.
8 The problem has been elimi-
nated through the checks of
steps up to 7.
NO Change IU.
→Change Image Transfer
Belt Unit.
→Change LPH Assy.
→Change PIC Board.
→Change LED Drive Board
→Change LPH Unit.
→Change High Voltage Unit
(Image Transfer, Neutralizing).
4011T031AA
4011T042AA
4004T011AA