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PROBLEM
CR motor does not
operate
Check paper
Cover open
Samsung Electronics
ITEMS TO BE CHECKED
• Check the harness contact.
• Check the control signals of U44-32-34 in
Main PBA.
• Check the motor signals of U4-1, 19 in
Driver PBA.
• Check the paper jamming.
• Check the ASF.
• Check the sensor output in Main PBA.
• Otherwise
• Check the sensor output in Main PBA.
• Otherwise
HOW TO SOLVE
• Check CN5 contact in Main PBA, CN2 contact in
Driver PBA, and CN5, 6 in Driver PBA whether
each connection is tight.
• If these CMOS signals are defective when the
other functions normal, replace the Main PBA.
• If these 30V signals are defective when the other
functions normal, replace the Driver PBA.
• Check the real jammming in paper path, and
remove it.
• Check the ASF according the "Paper Feed".
• Check 5V of U12-64 when the sensor lever is
interrupted, and 0V of U12-64 when the sensor
lever is lifted. If the sensor is defected, replace it.
• Replace the Main PBA.
• Check 5V of U12-63 when the sensor lever is
freely lifted, and 0V of U12-63 when the sensor
lever is pressed. If the sensor is defected,
replace it.
• Replace the Main PBA.
Troubleshooting
4-7
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