Epson Stylus Pro 7400 Service Manual page 191

EPSON Stylus Pro 7400/7800/9400/9800
SERVICE CALL 00010003
Description
The PF Motor out of position time-out error
Explanation
The printer causes this error and stops operation if it detects that the paper could
not be moved to the target position within a fixed time period while the PF Motor
stopping operation.
Check Point
1. Make sure that the PF Encoder and the PF loop scale are free of dust or
foreign materials.
2. Perform the Encoder check by the
TESTING)" (p.106).
3. Make sure that the PF Timing Belt is normal and its tension is appropriate.
4. Make sure that the Grid Roller rotates smoothly without any abnormal load.
5. Make sure that the PF Motor is not shorted out.
If it does, replace the C594 Main Board together with the PF Motor.
6. Make sure that the harnesses are connected correctly and not broken.
Remedy
1. Clean dirt or paper dust on the Loop Scale and check if it is damaged.
2. Execute the PF Timing Belt Tension Adjustment
3. Replace the PF Encoder Sensor (p.258).
4. Replace the PF MOTOR ASSY. (p.255).
5. Replace the BOARD ASSY., MAIN (p.232).
Troubleshooting
"1.4.6.1 Self Testing Menu (SELF
(p.307).
Troubleshooting based on Panel Messages
SERVICE CALL 00010004
Description
CR Encoder check error
Explanation
The printer causes this error and stops operation if it cannot detect the encoder
pulse signals at intervals of the specified time during the power-on initialization
operation or while the CR Motor is driving.
Possible Causes
CR Encoder FFC is disconnected.
The CR Motor connector is disconnected.
The FFC of the encoder on the CR side is broken.
The wiring of the A and B phases are wrong (opposite)
The wiring of the CR Motor is wrong (opposite)
The CR Motor shorted out.
The fuse for the motor driver is blown. (on the Main Board)
Check Point
1. Make sure that the Timing Fence is securely attached on the CR Encoder.
2. Make sure that the CR Encoder and the Timing Fence are free of dust or
foreign materials.
3. Perform the Encoder check by the
TESTING)" (p.106).
4. Make sure that the CR Timing Belt is normal and its tension is appropriate.
5. Make sure that the Carriage moves smoothly without any abnormal load.
6. Make sure that the CR Motor is not shorted out.
If it does, replace the C594 Main Board together with the CR Motor.
7. Make sure that the harnesses are connected correctly and not broken.
Remedy
1. Reattach the Timing Fence for detecting the encoder securely and correctly.
2. Clean dirt or paper dust on the Timing Fence and check if it is damaged.
3. Reconnect the CR Encoder FFC or the CR Motor connector securely.
CR Timing Belt Tension Adjustment
4. Execute the
5. Replace the CR Encoder Sensor (p.246).
6. Replace the CR MOTOR ASSY. (p.243).
7. Replace the BOARD ASSY., MAIN (p.232).
Revision B
"1.4.6.1 Self Testing Menu (SELF
(p.306).
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