Epson Stylus Pro 7400 Service Manual page 189

EPSON Stylus Pro 7400/7800/9400/9800
Remedy
1. Check the life count of the CR Motor in the
Press the [Menu] button → PRINTER STATUS menu -
SERVICE LIFE → CR MOTOR.
• When the life is still remaining
Replace the BOARD ASSY., MAIN (p.232).
When the life has expired or close to the end-of-life
•
Replace the CR MOTOR ASSY. (p.243).
2. As the lifespan of the CR Motor means the lifespan of the printer, the whole
printer mechanism checks and corresponding maintenance works must be
carried out. Especially, the following items should be carefully checked or
performed.
• Check the Head FFC for any damage such as break, scratch, etc.
Check the CR Timing Belt and the PF Timing Belt for any damage.
•
Check if abnormal sounds are produced from the sliding surfaces of the
•
Guide Rail and the bearings of the Carriage Unit (wear of the bearings).
• Check if the paper dust or any other dust accumulates on the paper path.
If it does, clean it as indicated in
(p.376).
• Refer to "6.2 Lubrication" (p.377)
necessary.
Whenever the CR Motor Assy. is replaced, the corresponding
C H E C K
P O I N T
adjustment (including resetting the counter) must be carried
out. See Chapter 5 on page 292.
Do not reset the CR TOTAL counter (CR Motor cumulative
life counter).
Troubleshooting
"1.4.4 Panel Setting" (p.50).
See Section 1.4.4.30 on page 84.
"6.1.2 Required Maintenance Items"
and lubricate the specified points if
Troubleshooting based on Panel Messages
SERVICE CALL 00010000
Description
PF 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 PF Motor is driving.
Possible Causes
The PF Encoder connector is disconnected.
The PF Motor connector is disconnected.
The Encoder harness on the PF side is broken.
The wiring of the A and B phases are wrong (opposite)
The wiring of the motor is wrong (opposite)
The PF Motor shorted out.
The PF Motor is energized continuously and kept rotating abnormally.
The fuse for the motor driver is blown. (on the Main Board)
The Main Board is damaged. (+42V/+24V remote control is broken)
The Power Supply Board is damaged (42V is OFF)
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. Reconnect the PF Encoder connector or the PF Motor connector securely.
3. Execute the PF Timing Belt Tension Adjustment
4. Replace the PF Encoder Sensor (p.258).
5. Replace the PF MOTOR ASSY. (p.255).
6. Replace the BOARD ASSY., MAIN (p.232).
Revision B
"1.4.6.1 Self Testing Menu (SELF
(p.307).
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