Samsung SL-M4580FX Service Manual page 196

4. Troubleshooting
• Check the signal and power with the DVM.
• If the checked result is normal, replace the main(feed/fuser) motor(JC31–00144B).
• If the checked result is abnormal, check the following.
- If 24V power is not generated, replace the SMPS
-
If the control signal is abnormal, replace the main board(JC92–02722A).
b) If the main(feed/fuser) motor is operational,
• Check the Pin No 8. If the value is abnormal, replace the main board. If the value is normal, replace
the harness.
8) Check the pick up clutch connection. If the pick up clutch(JC47-00033E) is defective, replace it.
4-93
board(JC44-00092C (220V) / JC44-00091C
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(110V)).