Samsung ML-6050 Service Manual page 71

Error code 3-080
Fault
Defective motor operation
Description
Main motor is not driving when printing, and paper does not feed into the printer, resulting 'Jam 0'.
Check
1. Engine board
2. Sub motor board (Refer to 12 on page 6-6.)
Cause
1. Motor harness or CN104 may be defective.
2. U1 defective in the sub motor board.
Solution
1. Check the motor harness. replace it, if defective.
2-1. Perform DCU diagnostic code 00 and check the motor operation.
2-2. With DCU code '00', check for pulse at U1 pin 8 and pin 13. Or, check the related parts.
2-3. With DCU code '00', check U1 pin 4 and pin 17 are over 4V. If the pins are below 1V, check
R424.
2-4. If all above are OK, replace U1.
Remark
Others
Samsung Electronics
Troubleshooting
Model ML-xxxx
5-39