Epson Stylus Pro 7500, Service Manual

Page: 89 / 274

EPSON Stylus Pro 7500 Revision A
Troubleshooting Errors That Require a Service Technician 89
SERVICE CALL 00010004
o
Problem
CR motor encoder check error
The CR motor makes small revolutions clockwise and counter-clockwise. When it
turns, the printer checks the encoder output signals to make sure the motor is
turning at the correct speed/distance. If the encoder doesn’t send the correct signal
or output data, an error occurs.
o
Solution
Make sure there is nothing blocking the carriage. If that does not solve the
problem, check the CR motor encoder connection. If there still is a problem, try
the following.
If there are abnormalities:
n
Check if the T fence for detection of the encoder pulse is removed
n
Check for dirt, paper dust or damage to the T fence
n
Replace the CR_ENC (carriage encoder) sensor
n
Replace the CR motor
n
Replace the C299 MAIN Board
SERVICE CALL 00010005
o
Contents
CR Motor out of Synch
Abnormal CR encoder output pulse width detected (Long or short with respect to
the specified time).
o
Solution
Check if there is not some abnormal load during carriage movement. If there is no
abnormality, but the error is not cleared, check the CR motor encoder. If there are
abnormalities:
n
Check if the T fence for detection of the encoder pulse is removed
n
Check for dirt, paper dust or damage to the T fence
n
Replace the CR_ENC (carriage encoder) sensor
n
Replace the CR motor
n
Replace the C299 MAIN Board
SERVICE CALL 00010006
o
Problem
CR motor overcurrent
Feedback from the CR motor (IC33) driver’s 10-pin output (Sense signal)
indicates that the CR motor’s current is irregular.
o
Solution
n
Replace the CR motor
n
Replace the C299 Main Board
SERVICE CALL 00010007
o
Contents
CR Motor In Position Time Out
In the CR motor control, position control did not finish within the regular position
stabilization time (in position time) during stop processing.
o
Solution
n
Replace the CR_ENC (carriage encoder) sensor.
n
Replace the CR motor
n
Replace the C299 Main Board
SERVICE CALL 00010008
o
Problem
Servo interrupt watchdog time-out error due to motor-drive control related error
o
Solution
Replace the C299 Main Board