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EPSON Stylus Pro 7600/9600 Revision A
Troubleshooting Error Display 135
3.2.4.2 PF motor encoder check error (00010000)
Explanation:
During initial operation at power on or during PF Motor operation, there may be a
case where the encoder pulse signal can not be recognized at specified intervals. In
such a case, this message is displayed and the printer stops operating.
Cause of trouble:
Broken wire for the PF motor encoder, inverted wiring for A and B pulses,
disconnected connector for the encoder or motor, or inverted wiring for the motor.
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 (5.8 Ω).
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).
3.2.4.3 PF Motor out of step (00010001)
Explanation:
During PF Motor operation, there may be a case where the encoder pulse signal
within the specified range is not input within a specified period of time or the pulse
width is extremely long. In such a case, the PF Motor is judged to be out-of-step,
so that this message is displayed and the printer stops operating.
Cause of trouble:
• During paper feed operation, the error counter has reached the out-of-step
pulse count.
• Defective motor.
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:
• PF Timing Belt Tension Adjustment (p.264)
• Replace the PF Motor (p.185).
• Replace the PF motor extension cable
• Replace the MAIN Board (C472 MAIN) (p.207).