Black/White Spot - Ricoh B173 Service Documentation

4.6.4 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
If dark or blurry black spots occur
periodically, the rollers in the Developer
may be contaminated with foreign
matter or paper particles.
(Charge roller : 37.7 mm interval
OPC drum : 75.5 mm interval)
If faded areas or voids occur in a black
image at intervals of 75.5 mm, or black
spots occur elsewhere, the OPC drum
surface is damaged.
If a black image is partially broken, the
transfer voltage is abnormal or the
transfer roller's life has expired.
SM
PRINTING QUALITY PROBLEMS
Solution
Run OPC cleaning Mode Print and run
the Self-test 2 or 3 times.
In case of 75.5 mm interval, clean
foreign substances stuck on the OPC
location equivalent to the black spots
and white spots with a dry duster.
The transfer roller is guaranteed for
60,000 sheets. If the roller's life is
expired, replace it.
In case of 37.7 mm interval, take
measures as to replace the AIO and
try to print again.
4-23
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
B173T916.WMF
B173