Check and Cause Solution
1. Bad contact of the voltage terminals to
developer.
2. The rollers of developer may be stained.
Charge roller = 37.7 mm
Supply roller = 37 mm
Develop roller = 35.3 mm
Transfer roller = 45.3 mm
1. Clean each voltage terminal of the Charge,
Supply, Develop and Transfer roller.
(remove the toner particles and paper par-
ticles)
2. Measure the interval of the black bands,
refer to the measurements shown oppo-
site and clean the appropriate gear in the
OPC.
3. If the malfunction persists, replace the
developer.
7.3.4 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 periodi-
cally, 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)
2. 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.
3. If a black image is partially broken, the
transfer voltage is abnormal or the trans-
fer roller's life has expired.
1. Run OPC cleaning Mode Print and run the
Self-test 2 or 3 times.
2. In case of 75.5 mm interval unremovable in
1, remove any foreign substances stuck
on the OPC location equivalent to black
spots and white spots with a dry duster.
3. The transfer roller guarantees 60,000
sheets printing. If the roller's life is expired,
replace it.
4. In case of 37.7 mm interval not removable in
1, replace the developer cartridge and try
to print out.
5. Clean paper particles and foreign matter
from the inside of the machine.
7-11
WorkCentre PE16
Troubleshooting
Service Manual
July 2003
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