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Troubleshooting
Fault
White Black spot
• Light or dark black
Digital Printer
Digital Printer
• White spots occur
Digital Printer
Digital Printer
Digital Printer
Recycled product
• Poor appearance of
• Dirty or rough
• Bad background in
Service Manual
7-22
Signs
1. If light or dark black dots
occur at regular intervals this
dots on the image
is because the toner cartridge
occur periodically.
rollers are contaminated with
foreign substance or paper
particles.
in the image
(1)38mm interval : Charge
periodically.
roller
(2)95mm interval : OPC cycle
2. If white spots occur in a black
image at intervals of 95mm,
or black spots occur
elsewhere, the OPC drum is
damaged or foreign
substance is stuck to the
surface.
3. If a black and white or
graphic image is partially
broken at irregular intervals,
the transfer roller's life has
been expired or the transfer
voltage is abnormal.
1. Poor appearance of the toner
the toner cartridge.
cartridge.
(a)Check for damage to label
and if different materials are
printouts.
used.
(b)Check the appearance of
parts of the toner cartridge,
the image.
such as frame, hopper, screws
2. Unclean and rough printouts.
(a)Check that the terminals
(contact point) of the toner
cartridge and the set are clean.
(b)Check that the terminals
(contact point) of the toner
cartridge and the set are not
damaged.
Cause & Check
Solution
1. For item 1 -
Run OPC Cleaning Mode Print
4-5 times repeatedly to remove
excess toner. Especially check
for foreign substances on the
OPC surface Clean with a clean
gauze moistened with IPA
Isopropyl Alcohol) take care not
to damage the OPC surface.
Never use other forms of alcohol.
2. For Item 2 -
If running OPC Cleaning Mode
Print 4-5 times does not resolve
the problem
: at intervals of 37.7mm - place
the toner cartridge.
: at intervals of 75.5mm – clean
OPC drum.
3. For item 3 - Change the transfer
roller because the life of the
transfer roller has expired.
(Check the transfer voltage and
readjust if necessary.)
1. For Item 1 the cartridge is judged
to be a recycled product -
(a) If there is any evidence of
disassembling the toner cartridge.
(b) If materials other than normal
parts of the toner cartridge are
added or substituted.
2. Clean all HV contacts. If the
problem persists replace the
cartridge.
Note If the cartridge is judged to be
recycled then these types of
problems can occur when the
toner cartridge is recycled over
2 times.
If 'nearly empty' cartridges are
collected for re-use this is
judged as recycling the toner
cartridge.
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