Epson Stylus Pro 7400, Service Manual

Page: 192 / 428

EPSON Stylus Pro 7400/7800/9400/9800 Revision B
Troubleshooting Troubleshooting based on Panel Messages 192
SERVICE CALL 00010005
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Description
CR Motor is out of step.
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Explanation
The printer causes this error and stops operation if it cannot detect the specified-
length encoder pulse signals within a fixed time period or when abnormally long
or short pulse signals are detected while the CR Motor is rotating.
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Possible Causes
„
The connector of the Cutter Solenoid is disconnected.
„
The fuse for the Solenoid is blown. (on the Main Board)
„
CR Motor failure
„
The CR Motor driver is damage. (42 V is shorted)
„
The temperature fuse of the Cutter Solenoid is blown (the Cutter Solenoid
does not work and the Carriage cannot be unlocked.)
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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 “1.4.6.1 Self Testing Menu (SELF
TESTING)” (p.106) .
4. Make sure that the CR Timing Belt is normal and its tension is appropriate.
5. Perform the CR HP Sensor check by the
“1.4.6.1 Self Testing Menu (SELF
TESTING)” (p.106) .
6. Make sure that the Carriage moves smoothly without any abnormal load.
7. Make sure that the CR Motor is not shorted out.
If it does, replace the C594 Main Board together with the PF Motor.
8. Make sure that the harnesses are connected correctly and not broken.
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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 Cutter Solenoid connector securely and correctly.
4. Execute the
CR Timing Belt Tension Adjustment (p.306) .
5. Replace the CR Encoder Sensor (p.246).
6. Replace the CR MOTOR ASSY. (p.243).
7. Replace the CUTTER SOLENOID ASSY. (p.248).
8. Replace the BOARD ASSY., MAIN (p.232).
SERVICE CALL 00010007
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Description
The CR Motor out of position time-out error
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Explanation
The printer causes this error and stops operation if it detects that the Carriage
could not be moved to the target position within a fixed time period while the CR
Motor stopping operation is performed.
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Possible Causes
The Carriage movement cannot be finished due to the remaining pulses smaller
than those generated by the motor out-of-step state.
†
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 “1.4.6.1 Self Testing Menu (SELF
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 PF 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. Execute the
CR Timing Belt Tension Adjustment (p.306) .
4. Replace the CR Encoder Sensor (p.246).
5. Replace the CR MOTOR ASSY. (p.243).
6. Replace the BOARD ASSY., MAIN (p.232).