Samsung MultiXpress M537x series Service Manual page 220

4. Troubleshooting
• Check the signal and power with the DVM.
• If the checked result is normal, replace the Dev motor(JC31-00090A)
• 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(JC92–02661A)
b) If the 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.
4-84
board(JC44-00100C (220V) / JC44-00093C
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(110V)).