Epson Stylus Pro 4400 Service Manual page 180

EPSON Stylus Pro 4400/4450/4800/4880/4880C
SERVICE REQ. 00010005
Error meaning:
CR Motor out of step
Explanation
During CR Motor operation, there may be a case where the encoder pulse
signal within the specified range is not input within a specified period of
time or the pulse width is extremely long or short. In such a case, the CR
Motor is judged to be out-of-step, so that this message is displayed and the
printer stops operating.
Cause of trouble
Defective CR Motor.
CR Motor driver damage (42V system short)
Broken temperature fuse for Cutter Solenoid.
Points to be checked
1. CR Scale is disconnected from CR Encoder Sensor.
2. The CR Encoder 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. Execute the CR_HP Sensor checking by the
Menu (SELF TESTING)" (p.91)
6. The Carriage Unit must slide smoothly, free from undue load.
7. Measure the resistance value of the CR Motor. (17.9 ± 10% [Ω])
8. 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. Perform the CR Timing Belt Tension Adjustment (p.376)
4. Replace the CR Encoder Sensor (p.280)
5. Replace the CR_HP Sensor (p.276)
6. Replace the Motor Assy., CR (p.270)
7. Replace the C593 MAIN Board (p.226)
8. Replace the Cutter Solenoid.
Troubleshooting
"1.4.6.1 Self Testing Menu (SELF
"1.4.6.1 Self Testing
in "Maintenance Mode 2".
Troubleshooting Based on Panel Messages
SERVICE REQ. 00010006
Error meaning:
CR Motor over current
Explanation
During CR Motor operation, there may be a case where an abnormal
current out of the specified limits is detected in the CR Motor drive circuit
on the BOARD ASSY., MAIN or a current exceeding the specified value is
required. In such a case, this message is displayed and the printer stops
operating.
Points to be checked
1. The CR Scale must be free from dust and dirt or any other foreign
matters.
2. Execute the CR_HP Sensor checking by the
Menu (SELF TESTING)" (p.91)
3. Measure the resistance value of the CR Motor. (19.3± 10% [Ω])
If the CR Motor is found in short mode, replace the BOARD ASSY.,
MAIN at the same time.
4. By visual inspection, check the harness of the CR Motor for any
problem causing a short circuit to the frame.
Remedy
1. Check for dirt, paper dust or damage to the CR Scale.
2. Perform the CR Timing Belt Tension Adjustment (p.376)
3. Replace the CR_HP Sensor (p.276)
4. Replace the Motor Assy., CR (p.270)
5. Replace the C593 MAIN Board (p.226)
Revision C
"1.4.6.1 Self Testing
in "Maintenance Mode 2".
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