Muratec F-116 - Manual (Page 90)

Alignment and Troubleshooting
4-30
4) Black/White Spot
Description : 1. Dark or blurry spots occur periodically in the printing
2. White spots occur periodically in the printing
3. If a black image is
partially broken, the transfer voltage is
abnormal or the transfer roller's
life has expired.
2. If faded areas or voids
occur in a black image at intervals
of 75.6 mm, or black spots occur elsewhere,
the OPC drum surface is
damaged.
In case of 75.6 mm interval
unremovable in 1, Clean foreign
substances stuck on the OPC location
equivalent to black spots and white
spots with a dry duster
.
1. The transfer roller has expired
[50.000 sheets]. Replace it.
2. In case of 37.5 mm interval
unremovable in 1, take measures
as to replace the developer
cartridge and try to print out.
3. Clean the inside of the set against
the paper particles and foreign
matter in order not to cause the
trouble.
Print several OPC cleaning Mode
Prints and then run the Self-test
2 or 3 times.
1. If dark or blurry
black spots occur periodically,
the rollers in the Developer may be conta-
minated with foreign material or paper particles.
(Charge roller : 37.5mm interval
OPC drum : 75.6mm interval)