Samsung ML-6050 Service Manual page 67

Error code 3-030
Fault
Paper Empty
Description
• The PAPER lamp on the operator panel is on even when paper is loaded in the cassette.
• The PAPER lamp on the operator panel does not come on when the paper cassette is empty.
Check
1. Actuator-Empty (Refer to 52 on page 6-6.)
2. Engine board
Cause
1. Empty actuator may be defective.
2. Photo sensor OP2 on the engine board may be defective.
Solution
1. Replace the defective actuator.
2-1. U6 (74HC245) pin 15 should be over 3.5V when OP2 sensor is blocked, and below 0.7V
when the sensor is not blocked.
2-2. One end of R24 in the transmitter of OP2 should be 5V, and the other end 1.2V.
2-3. If the related resistors are good, check for short circuit of OP2 receiver.
If OP2 is normal, replace U6 (74HC245).
Remark
Others
Samsung Electronics
Troubleshooting
Model ML-xxxx
5-35