Samsung ML-1440 Service Manual - Page 61

Signs and Measures at Poor toner cartridge

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Troubleshooting 4-5-4 Signs and Measures at Poor toner cartridge Fault Signs Cause & Check Solution Light image and partially blank image (The life is ended.) Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer • The printed image is light or unclean and untidy. • Some part of the image is not printed. • Periodically a noise as "tick tick" occurs. 1. If the image is light or unclean and untidy printed image Shake the developer and then recheck. (1)NG: Check the weight of the developer (2)OK: Lack of toner, so the life is nearly closed. 2. Some part of image is not printed - Shake the developer and then recheck. (1)NG: Check the weight of the developer and clean the LSU window with a cotton swab, then recheck. (2)OK: Lack of toner, so the life is nearly closed. 3. Periodically a noise as "tick tick" occurs - Measure the cycle and the weight of the developer. 4. White vertical stripes on the whole screen or partly : Check the weight of the developer. 1. All of 1, 2, 3 aboveIf it become better by shaking, replace with a new developer after 50-100 sheets in the closing state of the life span. 2. In case of 2If it becomes better after cleaning the LSU window, then the developer is normal. (Because of foreign substance on the LSU window, the image has not been printed partly.) 3. In case of 3If the cycle of noise is about 2 seconds, the toner inside the developer has been nearly exhausted.( Purchase and replace with a new developer after using about 200 sheets at the point of occurrence) 4. In case of 3This is a phenomenon caused by lack of toner, so replace with a new developer. Toner Contamination • Toner is fallen on the papers periodically. • Contaminated with toner on prints partly or over the whole surface. 1. Toner is fallen on the paper periodically. (1)Check the cycle of the falling of the toner. (2)Check the appearance of both ends of the developer OPC drum. 2.The center of the printed matter is contaminated with toner. (1)Check whether foreign substances or toner are stuck to the terminal (contact point) of the developer. (2)Check whether the state of the terminal assembly is normal. 1. If both ends of the OPC drum are contaminated with toner: Check the life of the developer. 2. Check whether it could be recycled. 3. If it cannot be recycled: Replace the developer. Samsung Electronics 4-23

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Troubleshooting
4-23
Samsung Electronics
4-5-4 Signs and Measures at Poor toner cartridge
Fault
Signs
Cause
&
Check
Solution
Light image and
partially blank
image
(The life is ended.)
Toner
Contamination
• The printed image
is light or unclean
and untidy.
• Some part of the
image is not print-
ed.
• Periodically a noise
as "tick tick" occurs.
• Toner is fallen on
the papers periodi-
cally.
• Contaminated with
toner on prints part-
ly or over the whole
surface.
1. If the image is light or unclean
and untidy printed image -
Shake the developer and
then recheck.
(1)NG: Check the weight of the
developer
(2)OK: Lack of toner, so the life
is nearly closed.
2. Some part of image is not
printed -
Shake the develop-
er and then recheck.
(1)NG: Check the weight of the
developer and clean
the LSU window with a
cotton swab, then
recheck.
(2)OK: Lack of toner, so the life
is nearly closed.
3. Periodically a noise as "tick
tick" occurs - Measure the
cycle and the weight of the
developer.
4. White vertical stripes on the
whole screen or partly :
Check the weight of the
developer.
1. Toner is fallen on the paper
periodically.
(1)Check the cycle of the
falling of the toner.
(2)Check the appearance of
both ends of the developer
OPC drum.
2.The center of the printed mat-
ter is contaminated with toner.
(1)Check whether foreign sub-
stances or toner are stuck
to the terminal (contact
point) of the developer.
(2)Check whether the state of
the terminal assembly is
normal.
1. All of 1, 2, 3 above-
If it become better by shaking,
replace with a new developer
after 50-100 sheets in the clos-
ing state of the life span.
2. In case of 2-
If it becomes better after clean-
ing the LSU window, then the
developer is normal.
(Because of foreign substance
on the LSU window, the image
has not been printed partly.)
3. In case of 3-
If the cycle of noise is about 2
seconds, the toner inside the
developer has been nearly
exhausted.( Purchase and
replace with a new developer
after using about 200 sheets at
the point of occurrence)
4. In case of 3-
This is a phenomenon caused
by lack of toner, so replace with
a new developer.
1. If both ends of the OPC drum
are contaminated with toner:
Check the life of the developer.
2. Check whether it could be recy-
cled.
3. If it cannot be recycled:
Replace the developer.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer