EPSON Stylus Pro 7400/7800/9400/9800 Revision B
Troubleshooting Troubleshooting based on Panel Messages 190
SERVICE CALL 00010001
Description
The PF Motor is out-of-step.
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 PF Motor is rotating.
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 “1.4.6.1 Self Testing Menu (SELF
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. Replace the PF Encoder Sensor (p.258).
3. Replace the PF MOTOR ASSY. (p.255).
4. Replace the BOARD ASSY., MAIN (p.232).
SERVICE CALL 00010002
Description
Overcurrent occurred on the PF Motor.
Explanation
The printer causes this error and stops operation if an abnormal electric current
beyond the prescribed range is detected at the PF Motor drive circuit on the C594
Main Board while the PF Motor is rotating or when a current beyond the
prescribed range is required to be supplied to the motor.
Check Point
1. Make sure that the PF Loop Scale is free of dust or foreign materials.
2. Make sure that the PF Motor is not shorted out.
If it does, replace the C594 Main Board together with the PF Motor.
3. Visually check if there is a point where likely to cause a short of the PF Motor
harness with the frame.
Remedy
1. Clean dirt or paper dust on the Loop Scale and check if it is damaged.
2. Replace the PF MOTOR ASSY. (p.255).
3. Replace the BOARD ASSY., MAIN (p.232).
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