4.9 Periodic Defective Image
If a mark or other printing defect occurs at regular intervals down the page it may be caused by a damaged or
contaminated roller. Measure the repetition interval and refer to the table below to identify the roller concerned.
No
Roller
Defective image
Typical defect
1
OPC Drum
75.5mm
white spot on black image or black spot
2
Charge Roller
37.8mm
black spot
3
Supply Roller
44.9mm
light or dark horizontal image band
4
Developing Roller
35.2mm
horizontal image band
5
Transfer Roller
45.3mm
image ghost
6
Heat Roller
64.0mm
Black spot and image ghost
7
Pressure Roller
75.3mm
black spot on the backside
SCAN PART
PTL
1
3
7
5
MP Sensor
1
2
3
4
OPC Drum
Charge Roller
Supply Roller
Developing Roller
5
6
7
Tramsfer Roller
Heat Roller
Pressure Roller
<Rollers Layout>
Samsung Electronics
Service Manual
4-9
Alignment and Adjustmens
Содержание SCX-4200 Series
Страница 17: ...Samsung Electronics Service Manual System Overview 3 2 3 1 2 Sensor ...
Страница 18: ...System Overview Samsung Electronics Service Manual 3 3 3 1 3 Control Panel ...
Страница 81: ...Service Manual Disassembly and Reassembly 5 24 Samsung Electronics ...
Страница 117: ...Service Manual Exploded Views Parts List 8 8 8 7 OPE Assembly Exploded View 0 1 2 3 4 5 6 7 8 10 9 10 10 ...