Epson Stylus Pro 4910 Service Manual page 61

Epson Stylus Pro 4900/Epson Stylus Pro 4910
Code Error Name
1. During detection of paper thickness, the thickness cannot be
determined because the sensor is not stable due to vibration
Paper Thickness
or the like.
1551
Sensor error
2. The Paper Thickness Sensor is damaged and cannot detect
the paper thickness correctly.
The electric current flowing when driving the motor is
irregularly large.
DCP Motor Decompression Pump cable is damaged.
155A
overload error Irregular load
Decompression Pump encoder failure
Decompression Pump failure
Detects that it is being driven at an irregularly faster speed
than the specified value just before stopping.
Irregular load
DCP Motor
155B
over speed error
Decompression Pump encoder failure
SUB Board is damaged.
Decompression Pump driver failure
Detects accumulatively more than the specified number of
times that it is being driven in the opposite direction to the
specified driving direction.
DCP Motor
155C
reversing error The polarity of Decompression Pump Assy cable is
opposite.
Decompression Pump Assy encoder failure
Detects that the driving period is irregularly long.
DCP Motor
155D Irregular load
driving 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
DCP Motor
155E
velocity deviation error Decompression Pump Assy encoder failure
Decompression Pump failure
SUB Board is damaged.
Decompression Pump driver failure
TROUBLE SHOOTING
Cause
1. Check if the Paper Thickness Sensor is secured
P.195)
2. Check if the cable of the Paper Thickness Sensor is routed
correctly and secured with hooks.
3. Carry out "Sensor Check" to check if the Paper Thickness
Sensor functions normally.
1. Check the connection of the Decompression Pump (CN232,
CN233) for disconnection and damage.
2. Carry out "Encoder Check" to check if the Decompression
Pump encoder functions normally.
Carry out "Encoder Check" to check if the Decompression
Pump encoder functions normally.
1. Check the connection of the Decompression Pump Assy
(CN232, CN233) for disconnection and wrong installation.
2. Carry out "Encoder Check" to check if the Decompression
Pump encoder functions normally.
Carry out "Encoder Check" to check if the Decompression
Pump encoder functions normally.
Remedies for Service Call Error
Check Item
firmly.(See
Replace the Paper Thickness
(See P.195) Sensor.
(See P.394)
Replace the Decompression
Pump.
(See P.399)
1. Replace the Decompression
2. Replace the SUB-B Board.
(See P.399)
3. Replace the Main Board.
Replace the Decompression
Pump.
(See P.399)
Replace the Main Board.
---
P.152)
1. Replace the Decompression
2. Replace the SUB-B Board.
(See P.399)
3. Replace the Main Board.
Revision A
Remedy
(See P.195)
(See P.254)
Pump. (See P.254)
(See
P.162)
(See
P.152)
(See P.254)
(See
Pump. (See P.254)
(See
P.162)
(See
P.152)
62
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