Epson Stylus Pro 4400 Service Manual page 179

EPSON Stylus Pro 4400/4450/4800/4880/4880C
SERVICE REQ. 00010003
Error meaning:
PF Motor in-position time-out
Explanation
At PF stop processing in PF Motor control, there may be a case where the
paper can not move to the final target position within a specified period of
time. In such a case, this message is displayed and the printer stops
operating.
Points to be checked
1. The PF Encoder Sensor and the PF Loop Scale must be free from dust
and dirt or any other foreign matters.
2. Execute encoder checking by the
TESTING)" (p.91) in "Maintenance Mode 2".
3. The PF Timing Belt must be free from any defects and the belt must be
in proper tension.
4. The PF Roller must rotate smoothly, free from undue load.
5. Measure the resistance value of the PF Motor (17.9 ± 15% [Ω]).
If the PF Motor is found in short mode, replace the BOARD ASSY.,
MAIN at the same time.
6. All the harness must be connected properly and free from short circuit
or broken wire.
Remedy
1. Check for dirt, paper dust or damage to the Loop Scale.
2. Perform the PF Timing Belt Tension Adjustment (p.378)
3. Replace the PF Encoder Sensor (p.357)
4. Replace the Motor Assy., PF (p.349)
5. Replace the C593 MAIN Board (p.226)
Troubleshooting
"1.4.6.1 Self Testing Menu (SELF
Troubleshooting Based on Panel Messages
SERVICE REQ. 00010004
Error meaning:
CR Motor Encoder check error
Explanation
During initial operation at power on or during CR Motor operation, there
may be a case where the encoder pulse signal is not input at specified
intervals. In such a case, this message is displayed and the printer stops
operating.
Cause of trouble
Disconnected FFC for the CR Encoder Sensor.
Disconnected connector for the CR Motor.
Broken wire for the CR Motor Encoder Sensor.
Inverted wiring for A and B pulses.
Inverted wiring for the CR Motor.
CR Motor short
Broken power supply fuse for the PF motor driver (on the Main Board )
Points to be checked
1. CR Scale is disconnected from CR Encoder Sensor.
2. The CR Encoder Sensor and the CR Scale must be free from dust and
dirt or any other foreign matters.
3. Execute encoder checking by the
TESTING)" (p.91) in "Maintenance Mode 2".
4. The CR Timing Belt must be free from any defects and the belt must
be in proper tension.
5. The Carriage Unit must slide smoothly, free from undue load.
6. Measure the resistance value of the CR Motor. (17.9 ± 10% [Ω])
7. All the harness must be connected properly and free from short circuit
or broken wire.
Remedy
1. Check to see if the CR Scale for detection of the encoder pulse is
removed.
2. Check for dirt, paper dust or damage to the CR Scale.
3. Check if connection of the CR Encoder Sensor connector or Motor
Assy., CR connector.
4. Perform the CR Timing Belt Tension Adjustment (p.376)
5. Replace the CR Encoder Sensor (p.280)
6. Replace the Motor Assy., CR (p.270)
7. Replace the C593 MAIN Board (p.226)
Revision C
"1.4.6.1 Self Testing Menu (SELF
179