Samsung CLP-600 Series, Service Manual

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Troubleshooting
Samsung Electronics
Service Manual
7-13
7.4.1 Fuser Error
7.4 Symptoms of Bad Operation and Troubleshooting.
Symptoms
Open Fuser / Over Heat / Low Heat displayed on the LCD Panel.
Check and Cause Solution
1. Check the continuity of the Thermostat, AC Wire and
Heat Lamp.
2. Check the continuity of the Thermistor and thermistor
harness / contacts.
3. Test the Heat Lamps and the overheat circuitry.
4. Check the fuser for any evidence of damage due to
overheating or melting.
1. Replace the whole Fuser assembly if the Thermostat
is open circuit, otherwise replace heat lamps as
required..
2. Replace broken thermistor or cables as necessary.
3. Replace the main PBA id the overheat circuit is faulty..
4. Replace the Fuser.
7.4.2 LSU Error
Symptoms
Engine LSU Error displayed on the LCD Panel.
Check and Cause Solution
1. Check the LSU Connector.
2. Check the LSU Motor.
3. Check the HSYNC signal.
4. Check the Deve Cover Micro switch.
1. Replace the LSU.
2. If the same error recurs replace the main PBA.
7.4.3 Fuser does not work due to the drive gear melting.
Symptoms
The fuser gears melt and the roller drive fails.
Check and Cause Solution
1. The Fuser makes a noise and fails to operate, rollers
may not rotate.
- Replace the Fuser.
- Replace the Main PBA.
- Replace the SMPS.