Epson Stylus Pro 4910 Service Manual page 62

Epson Stylus Pro 4900/Epson Stylus Pro 4910
Code Error Name
1. Connection failure of the Decompression Pump Assy.
2. Detects that it is being driven at an irregularly slower speed
than the specified value.
DCP Motor
155F
lock error
Paper thickness at At power-on, the paper thickness sensor detects more than 2.2
1561
power-on error mm paper thickness.
When driving the ASF motor, the electric current to drive the
motor exceeded the threshold value continuously more than
specified times.
ASF Motor
Paper feed error at the ASF
1562 abnormal load
Connection between the ASF Motor and the SUB-C Board
detection error
has an abnormality.
ASF Motor Assy encoder failure
ASF Motor failure
The electric current flowing when driving the motor is
irregularly large.
Irregular load
ASF Motor
156A
overload error
ASF Motor Assy cable is damaged.
ASF Motor Assy encoder failure
ASF Motor failure
Detects that it is being driven at an irregularly faster speed
than the specified value just before stopping.
Irregular load
ASF Motor
156B
over speed error
ASF Motor Assy encoder failure
SUB Board is damaged.
ASF Motor driver failure
Detects accumulatively more than the specified number of
times that it is being driven in the opposite direction to the
ASF Motor
specified driving direction.
156C
reversing error
The polarity of ASF Motor Assy cable is opposite.
ASF Motor Assy encoder failure
TROUBLE SHOOTING
Cause
Irregular load
Decompression Pump Assy encoder failure
Decompression Pump failure
Remedies for Service Call Error
Check Item
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. (See P.399)
1. Check if the paper with the thickness more than 2.2 mm is
loaded.
2. Carry out "Sensor Check" to check if the Paper Thickness
Sensor functions normally. (See P.394)
3. Check and adjust the position of Paper Thickness Sensor
(See P.369).
1. Check if the paper is correctly loaded into the ASF Cassette.
2. Check the connection of the ASF Motor Assy (CN311,
CN312) for disconnection and damage.
3. Carry out "Encoder Check" to check if the ASF Motor Assy
encoder functions normally. (See P.399)
1. Check the connection of the ASF Motor Assy (CN311,
CN312) for disconnection and damage.
2. Carry out "Encoder Check" to check if the ASF Motor Assy
encoder functions normally. (See P.399)
Carry out "Encoder Check" to check if the ASF Motor Assy
encoder functions normally. (See P.399)
1. Check the connection of the ASF Motor Assy (CN311,
CN312) for disconnection and wrong installation.
2. Carry out "Encoder Check" to check if the ASF Motor Assy
encoder functions normally. (See P.399)
Revision A
Remedy
Replace the Decompression
Pump. (See P.254)
Replace the Paper Thickness
Sensor. (See P.195)
Replace the ASF Motor Assy.
(See P.202)
Replace the ASF Motor Assy.
(See P.202)
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)
Replace the ASF Motor Assy.
(See P.202)
63
Confidential