Epson Stylus Pro 4910 Service Manual page 64

Epson Stylus Pro 4900/Epson Stylus Pro 4910
Code Error Name
Detects, when accelerating/decelerating the motor, that it is
being driven at an irregularly faster speed than the specified
value.
Irregular load
ASF Sub Motor over
157B
speed error ASF Sub Motor Assy encoder failure
ASF Sub Motor failure
SUB Board is damaged.
ASF Sub Motor driver failure
Detects accumulatively more than the specified number of
times that it is being driven in the opposite direction to the
ASF Sub Motor
specified driving direction.
157C
reversing error
The polarity of ASF Sub Motor Assy cable is opposite.
ASF Sub Motor Assy encoder failure
Detects that the driving period is irregularly long.
ASF Sub Motor driving
157D Irregular load
time-out error
Firmware becomes out of control.
Detects, when accelerating/decelerating the motor, that it is
being driven at an irregularly faster speed than the specified
value.
Irregular load
ASF Sub Motor
157E
velocity deviation error ASF Sub Motor Assy encoder failure
ASF Sub Motor failure
SUB Board is damaged.
ASF Sub Motor driver failure
1. Connection failure of the ASF Sub Motor Assy.
2. Detects that it is being driven at an irregularly slower speed
than the specified value.
ASF Sub Motor lock
157F
error
When paper eject position is shifting, it cannot be shifted
properly or this operation itself cannot be detected (Release =>
low load star wheels => high load star wheels).
Foreign object is stuck.
Paper eject position
1581
error Connection error of the Eject Star Wheels Position Sensor
Eject Star Wheels Position Sensor failure
Edge Release Assy encoder failure
Edge Release Assy failure
TROUBLE SHOOTING
Cause
Irregular load
ASF Sub Motor Assy encoder failure
ASF Sub Motor failure
Remedies for Service Call Error
Check Item
Carry out "Encoder Check" to check if the ASF Sub Motor
Assy encoder functions normally. (See P.399)
1. Check the connection of the ASF Sub Motor Assy (CN213,
CN214) for disconnection and wrong installation.
2. Carry out "Encoder Check" to check if the ASF Sub Motor
Assy encoder functions normally. (See P.399)
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Carry out "Encoder Check" to check if the ASF Sub Motor
Assy encoder functions normally. (See P.399)
1. Check the connection of the ASF Sub Motor Assy (CN213,
CN214) for disconnection and damage.
2. Carry out "Encoder Check" to check if the ASF Sub Motor
Assy encoder functions normally. (See P.399)
1. Check if any foreign object is stuck in the paper eject
mechanism.
2. Check the connection of the Eject Star Wheels Position
Sensor (CN235) for disconnection and damage.
3. Carry out "Sensor Check" to check if the Eject Star Wheels
Position Sensor functions normally. (See P.394)
4. Carry out "Encoder Check" to check if the Edge Release
Assy encoder functions normally. (See P.399)
Revision A
Remedy
1. Replace the ASF Sub Motor
Assy. (See P.203)
2. Replace the SUB-B Board. (See
P.162)
3. Replace the Main Board. (See
P.152)
Replace the ASF Sub Motor Assy.
(See P.203)
Replace the Main Board. (See
P.152)
1. Replace the ASF Sub Motor
Assy. (See P.203)
2. Replace the SUB-B Board. (See
P.162)
3. Replace the Main Board. (See
P.152)
Replace the ASF Sub Motor Assy.
(See P.203)
1. Replace the Eject Star Wheels
Position Sensor.
2. Replace the Edge Release Assy.
(See P.199)
65
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