Dell 1815dn Service Manual - Page 120

Fault, Signs, Cause, Check, Solution, Ghost & Image, Contamination, facing that of the developer

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Page 120 highlights

Troubleshooting Fault Ghost & Image Contamination Signs Cause & Check Solution • The printed image is too light or dark, or partially contaminated black. • Totally contaminated black. (Black image printed out) 1. The printed image is too light or dark, or partially contaminated black. (1)Check whether foreign substance or toner are stuck to the terminal(point of contact) of the developer. (2)Check whether the terminal assembly is normal. • The density of printouts is too dark and ghost occurs. 1. All of 1, 2, 3 above (1)Remove toner and foreign substances 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. Totally contaminated black. (Black image printed out) (1)Check whether foreign substances are stuck to the terminal(point of contact) of the developer and the state of assembly. (Especially check the charged roller terminal.) 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. 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 developing roller terminal.) 3. In case of 3 It is a phenomenon as the developing bias voltage of the devel oper. Clean the terminals of the developing roller, then recheck it. Service Manual 7-27

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Troubleshooting
Service Manual
7-27
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.