Alignment & Troubleshooting
Service Manual
4-66
Samsung Electronics
4.2.
4
.3 Print Quality
Error Status
Check
Solution
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and band
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1. Bad blade of Toner cartridge
2. LSU
3. Bad cleaning blade of drum cartridge.
1. Change Toner cartridge
2. Replace LSU
3. Replace drum cartridge.
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1. LSU window contamination
2. Toner cartridge
1. Clean LSU window
2. If not LSU, change Toner cartridge.
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1. GND OPC is well grounded?
2. LSU running well?
3. Bias voltage is normal?
4. Lower toner?
5. Is there video data from Main PBA
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
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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.
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
contaminated area.