Epson STYLUS PRO 4910 - Page 63

Epson Stylus Pro 4900/Epson Stylus Pro 4910 Revision A
TROUBLE SHOOTING Remedies for Service Call Error 64
Confidential
156D
ASF Motor
driving time-out error
Detects that the driving period is irregularly long.
 Irregular load
 Firmware becomes out of control.
---
Replace the Main Board. (See
P.152)
156E
ASF 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
 ASF Motor Assy encoder failure
 ASF Motor failure
 SUB Board is damaged.
 ASF Motor driver failure
Carry out “Encoder Check” to check if the ASF Motor Assy
encoder functions normally. (See P.399)
1. Replace the ASF Motor Assy.
(See P.202)
2. Replace the SUB-C Board. (See
P.163)
3. Replace the Main Board. (See
P.152)
156F
ASF Motor
lock error
Detects that it is being driven at an irregularly slower speed
than the specified value.
 Irregular load
 ASF Motor Assy encoder failure
 ASF Motor failure
Carry out “Encoder Check” to check if the ASF Motor Assy
encoder functions normally. (See P.399)
Replace the ASF Motor Assy.
(See P.202)
1571
ASF Retard Roller
Sensor operation error
ASF Retard Roller is not operating.
 Connection failure of the Retard Roller Sensor.
 Retard Roller Sensor failure
 ASF Sub Motor failure
1. Check the connection of the Retard Roller Sensor (CN216)
for disconnection and damage.
2. Carry out “Sensor Check” to check if the Retard Roller
Sensor functions normally. (See P.394)
1. Replace the Retard Roller
Sensor. (See P.206)
2. Replace the ASF Sub Motor
Assy. (See P.203)
1572
ASF Pickup Roller
operation error
ASF Pickup Roller is not operating.
 Connection failure of the Pickup Unit Sensor.
 Pickup Unit Sensor failure
 ASF Sub Motor failure
1. Check the connection of the Pickup Unit Sensor (CN215)
for disconnection and damage.
2. Carry out “Sensor Check” to check if the Pickup Unit
Sensor functions normally. (See P.394)
1. Replace the Pickup Unit
Sensor. (See P.206)
2. Replace the ASF Sub Motor
Assy. (See P.203).
1573
ASF Assist Roller
operation error
ASF Assist Roller is not operating.
 Connection failure of the Assist Roller Sensor.
 Assist Roller Sensor failure
 ASF Sub Motor failure
1. Check the connection of the Assist Roller Sensor (CN217)
for disconnection and damage.
2. Carry out “Sensor Check” to check if the Assist Roller
Sensor functions normally. (See P.394)
1. Replace the Assist Roller
Sensor. (See P.206)
2. Replace the ASF Sub Motor
Assy. (See P.203)
157A
ASF Sub Motor
overload error
The electric current flowing when driving the motor is
irregularly large.
 Irregular load
 ASF Sub Motor Assy cable is damaged.
 ASF Sub Motor Assy encoder failure
 ASF Sub Motor failure
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)
Replace the ASF Sub Motor Assy.
(See P.203)
Code Error Name Cause Check Item Remedy