Epson Stylus Pro 4900/Epson Stylus Pro 4910 Revision A
TROUBLE SHOOTING Remedies for Service Call Error 57
Confidential
151E
APG Motor
velocity deviation error
Detects, when accelerating/decelerating the motor, that it is
being driven at an irregularly faster speed than the specified
value.
Irregular load
APG Motor Assy encoder failure
APG Motor failure
SUB Board is damaged.
APG Motor driver failure
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1. Replace the APG Motor Assy.
(See P.179)
2. Replace the SUB-B Board. (See
P.162)
3. Replace the Main Board. (See
P.152)
151F
APG Motor
lock error
1. Connection failure of the APG Motor Assy.
2. Detects that it is being driven at an irregularly slower speed
than the specified value.
Irregular load
APG Motor Assy encoder failure
APG Motor failure
Check the connection of the APG Motor Assy (CN207,
CN206) for disconnection and damage.
Replace the APG Motor Assy.
(See P.179)
1520
Roll Feeding Motor
lock retry error
1. Detects an irregular load of the Roll Feeding Motor.
Roll Lock Sensor failure
Roll Feeding Motor failure
2. Detects the velocity deviation error of the Roll Feeding
Motor.
Roll Feeding Motor Assy encoder failure
SUB Board is damaged.
Roll Feeding Motor driver failure
1. Check if the Spindle is correctly attached to the printer.
2. Carry out “Sensor Check” to check if the Roll Lock Sensor
functions normally. (See P.394)
1. Replace the Roll Lock Sensor.
(See P.217)
2. Replace the Roll Feeding Motor
Assy. (See P.220)
3. Replace the SUB-D Board. (See
P.164)
4. Replace the Main Board. (See
P.152)
1521
Roll Lock Sensor
detection error
1. Connection failure of the Roll Lock Sensor.
2. Cannot detect Roll lock operation.
Roll Lock Sensor failure
Roll Feeding Motor failure
1. Check the connection of the Roll Lock Sensor (CN607) for
disconnection and damage.
2. Carry out “Sensor Check” to check if the Roll Lock Sensor
functions normally. (See P.394)
1. Replace the Roll Lock Sensor.
(See P.217)
2. Replace the Roll Feeding Motor
Assy. (See P.220)
1522
Roll Feeding Sensor
detection error
1. Connection failure of the Roll Feeding Sensor.
2. Roll Feeding Sensor does not detect the end of paper.
Roll Feeding Sensor failure
Roll Feeding Motor failure
1. Check the connection of the Roll Feeding Sensor (CN606)
for disconnection and damage.
2. Carry out “Sensor Check” to check if the Roll Feeding
Sensor functions normally. (See P.394)
1. Replace the Roll Feeding
Sensor. (See P.222)
2. Replace the Roll Feeding Motor
Assy. (See P.220)
1523
Roll Sensor
error
Cannot detect the end of the roll paper if it is fed.
Connection failure of the Roll Sensor.
Roll Sensor failure
1. Check the connection of the Roll Sensor (CN605) for
disconnection and damage.
2. Carry out “Sensor Check” to check if the Roll Sensor
functions normally. (See P.394)
Replace the Roll Sensor.
Code Error Name Cause Check Item Remedy