8-19
Samsung Electronics
Chapter 8. Troubleshooting
Traninung Manual
Engine Fuser Over Heat Error
The temperature of Fuser is higher than the Printing temperature.
1. Check the Thermostat on the Fuser.
--> If it is open circuit replace the Thermostat.
2. Check that the Thermostat on the Fuser is properly positioned and assembled.
--> Replace the Thermostat if it is not.
3. Check the Harness connected to the SMPS and Fuser.
--> Refit the harness or replace if damaged.
4. Replace the Main PBA.
5. Replace the SMPS.
Warning : You must replace the complete Fuser Ass'y if Over Heat Error has occurred.
Do not replace only the Thermistor.
Engine LSU Error
There is a fault in the LSU unit.
1. Use EDC mode to test the HSYNC signal and LSU Motor.
2. Check the Harness connected to the Engine Controller and LSU.
--> Refit the harness or replace it if it is damaged..
3. Replace the LSU.
Main Motor Error
The Main Motor that drives the OPC, ITB and Pick-Up is faulty.
1. Open the Deve Cover and Top Cover and then check the OPC Unit and ITB Unit.
--> Re-install if they are not correctly fitted or are damaged.
2. Open the Rear Cover and then check the Main Motor Harness.
--> Refit the harness or replace it if it is damaged.
3. Check if the Power Supply from the SMPS to the Main PBA.
--> Replace the SMPS if the voltages are outside specification.
4) Use EDC Mode to run the main motor. Check CN27 Pin 7 on the main PBA is low (almost 0V).
--> Replace the Main PBA if the voltage is near 5V
5) Use EDC Mode to run the main motor. Check that the Motor Clock is generated at CN27 Pin 9 on the Main PBA.
--> Replace the Main PBA if isn't generated.
