Xerox Phaser 3450 Service Manual page 98

Fault
Ghost & Image • The printed image
Contamination is too light or dark,
or partially contami-
nated black.
• Totally contaminat-
ed black.
(Black image print-
ed out)
• The density of print-
outs is too dark and
ghost occurs.
Signs Cause & Check
1. The printed image is too light
or dark, or partially contami-
nated black.
(1)Check whether foreign sub-
stance or toner are stuck to
the terminal(point of contact)
of the toner cartridge.
(2)Check whether the terminal
assembly is normal.
2. Totally contaminated black.
(Black image printed out)
(1)Check whether foreign sub-
stances are stuck to the ter-
minal(point of contact) of the
toner cartridge and the state
of assembly.
(Especially check the
charged roller terminal.)
3. The printed image is dark and
ghost occurs.
(1)Check foreign substance
attached to the terminal
(point of contact) of the
toner cartridge and the state
of assembly.
(Especially check the devel-
oping roller terminal.)
TROUBLESHOOTING
Solution
1. All of 1, 2, 3 above
(1)Remove toner and foreign sub-
stances adhered to the contact
point of the toner cartridge.
(2)The contact point of the unit
facing that of the toner car-
tridge also must be cleaned.
(3)If the terminal assembly is
unsafe:
• Fully stick the terminal to or
reassemble it after disassem-
bling.
• Disassemble the side plate and
push the terminal to be stuck,
then reassemble it.
2. In case of 2
It is a phenomenon when the
OPC drum of the toner cartridge
is not electrically charged. Clean
the terminals of the charged
roller, then recheck it.
3. In case of 3
It is a phenomenon as the devel-
oping bias voltage of the toner
cartridge. Clean the terminals of
the developing roller, then
recheck it.
Service Manual
7-23