Samsung CLX-8540ND Service Manual page 365

● Code : S-1
● Symptom :
-. Periodic White/Black/Color Spots
-, White Spot on Solid Image
-. Dot Size Blac/Color Spots
● Possible Cause:
1. OPC, charging roller, transfer roller defect.
2. Resistance change of the roller, Paper change by environment.
● Troubleshooting method :
1. If the horizontal line defect occurs at regular intervals, refer to
Roller' on page 4-209.
defective
Refer to the defect period table and replace the defective part.
2. Check if the paper in tray is changed. Load new papers in tray.
3. If the problem persists, replace the transfer roller.
4. Check if there are heat, cold wind by heater or air-conditioner. These things make the
environment recognition sensor get wrong information. In this case, move the machine in
proper place.
5. Replace the environment recognition sensor.
Environment recognition
sensor.
Troubleshooting
● Spots 2/2
'4.4.5 Abnormal Image Printing and
4-203