Service manual

Troubleshooting
Samsung Electronics 4-19
Background 1. High voltage output is normal?
2. C/R of Toner cartridge is contaminated?
1. Change the HVPS Board.
2. Print a number of “Cleaning” sheets – if
problem persists change the cartridge..
Ghost 1. High voltage output.
2. Pre-Transfer Lamp.
3. Bad high voltage contact.
1. Change the HVPS Board.
2. Check PTL lamp comes on –replace if
necessary
3. Clean the inside machine or replace toner
cartridge.
Stains on back of
paper
1. Contamination of transfer roller.
2. Toner debris in paper path
3. Pressure roller contamination
1. Clean the transfer roller with vacuum
cleaner.
2. Clean the paper path with a cloth or air
duster.
3. Remove fuser and replace it.
Poor Fusing 1. Paper quality and finish?
2. Check fusing temperature.
3. The machine was kept at a low tempera-
ture for a long time?
1. Should use recommended paper.
2. Check engine controller board. If you do
not have a thermometer, measure the
thermistor voltage to CPU, If 2.3V±5%
when printing is correct therwise disas-
semble fthe user and check the thermistor
contacts and thermistor.
3. Re-check after allowing the machine to
come up to room temperature.
Partial blank image
(not periodic)
1. Toner is low?
2. The toner cartridge is out of position?
1. Replace Toner cartridge.
2. Checkand adjust.
Partial blank image
(periodic)
1. repatative white or black marks at regular
intervals.
Measure the spacing of the marks and com-
pare the spacing to those given in the table
below.
• Spacing 1 and 2 – Replace the OPC
• Spacing 3 and 4 – replace the toner car
tridge
• Spacing 5 – replace the transfer roller
• Spacing 6 and 7 – replace the Fuser.
Error Status Check Solution
Digital Printer
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Digital Printer