Epson 9600, 7600 service manual PF motor overcurrent, PF motor in-position time out

EPSON Stylus Pro 7600/9600 Revision A

3.2.4.4 PF motor overcurrent (00010002)

†Explanation:

During PF Motor operation, there may be a case where an abnormal current out of the specified limits is detected in the PF Motor drive circuit on the C472MAIN Board or a current exceeding the specified value is required. In such a case, this message is displayed and the printer stops operating.

†Cause of trouble:

Hardware has detected overcurrent in the PF motor circuit.

†Points to be checked:

1.Measure the resistance value of the PF Motor (5.8Ω)

If the PF Motor is found in short mode, replace the C472MAIN Board at the same time.

2.By visual inspection, check the PF Loop Scale for any defect, such as damage or soiling, which can cause faulty reading by the sensor.

3.By visual inspection, check the harness of the PF Motor for any problem causing a short circuit to the frame.

†Remedy:

•Replace the PF Motor (p.185).

•Replace the PF motor extension cable

•Replace the MAIN Board (C472 MAIN) (p.207).

3.2.4.5 PF motor in-position time out (00010003)

†Explanation:

At PF stop processing in PF Motor control, there may be a case where the paper can not move to the final target position within a specified period of time. In such a case, this message is displayed and the printer stops operating.

†Cause of trouble:

There are pulses smaller than out-of-step pulse remaining without completing paper feed.

†Points to be checked:

1.The PF Encoder and the PF Loop Scale must be free from dust and dirt or any other foreign matters.

2.The PF Timing Belt must be free from any defects and the belt must be in proper tension.

3.The grid roller must rotate smoothly, free from undue load.

4.Measure the resistance value of the PF Motor (5.8Ω)

If the PF Motor is found in short mode, replace the C472MAIN Board at the same time.

5.Execute encoder checking by “5.2.2.4 Encoder ”(p225) in the self- diagnostics menu.

6.All the harness must be connected properly and free from short circuit or broken wire.

†Remedy:

•Replace the PF Encoder Sensor ASSY (p.186).

(Refer to PF Encoder Sensor Installation Position Adjustment (p.272))

•Replace the PF Motor (p.185).

(Refer to PF Timing Belt Tension Adjustment (p.264))

•Replace the MAIN Board (C472 MAIN) (p.207).

•Replace the PF motor extension cable

Troubleshooting Error Display 136