Print Quality - Samsung SCX-6320F/XEC Service Manual

Troubleshooting

7.3 Print Quality

Error Status
Vertical black line and
band
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Vertical white line
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
No image
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Light image
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Service Manual
7-4
Check
1. Bad blade of Toner cartridge
2. LSU
3. Bad cleaning blade of drum cartridge.
1. LSU window contamination
2. Toner cartridge
1. GND OPC is well grounded?
2. LSU running well?
3. Biss voltage is normal?
4. Lower toner?
5. Is there video data from Main PBA
1. LSU light power normal?
2. Enough toner?
3. High charger voltage?
4. Lower bias voltage
5. Contamination of high voltage contact.
6. Transfer volatge and roller.
Solution
1. Change Toner cartridge
2. Replace LSU
3. Replace drum cartridge.
1. Clean LSU window
2. If not LSU, change Toner cartridge.
1. Measure the resistance between frame
ground and the ground spring attached frame.
Confirm stable ground. Unless bad ground,
detach cabinet, check where is bad point
2.Adjust LSU or replace it
3. Normal Dev bias = -450V
4. Shake toner cartridge and print.If a like
good, toner is empty
5. Test engine test pattern , replace Main PBA
1. LSU light power check is difficult.
Compare with new one and check.
2. Check toner and the toner cartridge counter
3~4. Measure all high voltage output.
5. Leakage toner cause bad contact and
increase contact resistance. Clean contami-
nated area.
Samsung Electronics