Ricoh Aficio SP 5100N, Service Manual

Page: 90 / 175

The causes and solutions of Bad images
G186 4-4 SM
Check and Cause Solution
1. Bad contacts of voltage terminals to
print cartridge.
2. The rollers of the print cartridge may be
stained.
Charge roller = 38mm
Develop roller = 45mm
Transfer roller = 55mm
OPC Drum = 95mm
1. Clean each voltage terminal of the
Charge, Supply, Develop and Transfer
roller. (Remove the toner particles and
paper particles.)
2. Clean the right Gear that has relatively
small gap of the teeth in the OPC.
3. If the malfunction persists, replace the
print cartridge.
4.2.4 BLACK/WHITE SPOT
Description:
1. Dark or blurry black spots occur periodically in the printing.
2. White spots occur periodically in the printing.
Check and Cause Solution
1. If dark or blurry black spots occur
periodically, the rollers in the print
cartridge may be contaminated with
foreign matter or paper particles.
( Charge roller : 38 mm interval OPC
drum : 95 mm interval)
2. If faded areas or voids occur in a black
image at intervals of 95 mm, or black
1. Run OPC cleaning Mode Print and run
the Self-test 2 or 3 times.
2. In case of 95 mm interval unremovable
in 1, cleanly remove foreign
substances stuck on the OPC location
equivalent to black spots and white
spots with a dry duster.
3. The transfer roller guarantees 150,000