Samsung Lazett Combo SCX-4216F, Service Manual

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Samsung Electronics
TROUBLESHOOTING
Service Manual
Fault Signs Cause & Check Solution
Ghost & Image
Contamination • The printed image
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.
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 developer.
(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
developer 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
developer and the state of
assembly.
(Especially check the devel-
oping roller terminal.)
1. All of 1, 2, 3 above
(1)Remove toner and foreign sub-
stances adhered to the contact
point of the developer.
(2)The contact point of the unit
facing that of the developer
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 developer 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 devel-
oper. Clean the terminals of the
developing roller, then recheck it.