Epson Stylus Pro 4900/Epson Stylus Pro 4910 Revision A
TROUBLE SHOOTING Remedies for Service Call Error 53
Confidential
122A
PF Motor
overload error
The electric current flowing when driving the motor is
irregularly large.
PF Encoder cable is damaged.
PF Motor cable is damaged.
Irregular load
PF Encoder failure
PF Motor failure
1. Check the following connection for disconnection and
damage.
PF Encoder to SUB-C Board (CN303)
PF Motor to SUB-C Board (CN302)
2. Carry out “Encoder Check” to check if the PF Encoder
functions normally. (See P.399)
3. Carry out “Motor Measurement Adjustment (PF Motor)” to
check if the PF Motor functions normally. (See P.393)
1. Replace the PF Encoder. (See
P.183)
2. Replace the PF Motor. (See
P.182)
3. If the printer does not recover
from the error, it may be caused
by irregular load of the PF
Mechanism. Replace the Printer
Mechanism.
122B
PF Motor
over speed error
Detects that it is being driven at an irregularly faster speed
than the specified value just before stopping.
PF irregular load
PF Encoder failure
SUB Board is damaged.
PF Motor driver failure
Carry out “Encoder Check” to check if the PF Encoder
functions normally. (See P.399)
1. Replace the PF Encoder. (See
P.183)
2. Replace the SUB-C Board. (See
P.163)
3. Replace the Main Board. (See
P.152)
122C
PF Motor
reversing error
Detects accumulatively more than the specified number of
times that it is being driven in the opposite direction to the
specified driving direction.
The polarity of PF Encoder cable is opposite.
The polarity of PF Motor cable is opposite.
Slipping of the teeth of PF Timing Belt
PF Encoder failure
1. Check the following connection for disconnection and
installation direction.
PF Encoder to SUB-C Board (CN303)
PF Motor to SUB-C Board (CN302)
2. Check if the tension of the PF Timing Belt is proper. (See
P.366)
3. Carry out “Encoder Check” to check if the PF Encoder
functions normally. (See P.399)
1. Adjust the tension of the PF
Timing Belt. (See P.366)
2. Replace the PF Encoder. (See
P.183)
122D
PF 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)
122E
PF 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
PF Encoder failure
PF Motor failure
SUB Board is damaged.
PF Motor driver failure
1. Carry out “Encoder Check” to check if the PF Encoder
functions normally. (See P.399)
2. Carry out “Motor Measurement Adjustment (PF Motor)” to
check if the PF Motor functions normally. (See P.393)
1. Replace the PF Encoder. (See
P.183)
2. Replace the PF Motor. (See
P.182)
3. Replace the SUB-C Board. (See
P.163)
4. Replace the Main Board. (See
P.152)
Code Error Name Cause Check Item Remedy
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