Horizontal Band - Ricoh FAX1120L Service Manual

10 October, 2002

4.5.10 HORIZONTAL BAND

Black band?
YES
The black band has
regular interval?
YES
75.4 mm interval?
YES
The OPC is damaged due
to the irregular transfer
voltage of HVPS
→ Repair/replace HVPS
→ If the same problem
persists, replace the
AIO
Black
NO
band is far about 10
mm from white
band?
YES
Problem of internal
contacts in OPC
→ Replace AIO
This occurs when no
NO
Hsync/ at LSU
→ Replace the LSU
Does
NO
it appear at every
56.1 mm at specific
place?
YES
Heat roller is ruined
→ Replace the Fusing
unit
4-15
TROUBLESHOOTING FLOW CHART
The OPC is damaged
under the direct sunlight
NO
for around 5 minutes
→ If the same problem
persists in 10 hours,
replace the AIO
Problems of terminal
contact, transfer voltage
supplying, and transfer
NO
roller's due to the charge
roller is ruined (37.7 mm)
→ Repair/replace the
HVPS, AIO
H911T920.WMF