Troubleshooting; Motor And Sensor Troubleshooting - Epson Artisan 700 Service Manual
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Epson Artisan 700/Epson Stylus Photo PX700W/TX700W
3.2 Troubleshooting
3.2.1 Motor and Sensor Troubleshooting
Motors
The resistance values for the CR motor and the PF motor are given below, however, the values cannot be used to check the motors status since they are DC motor and the resistance
between the electric poles varies. Visually check the motors for abnormal operation and if it is hard to judge, replace the motor.
Motor
CR motor
PF motor
Decompression motor
Scanner motor
ADF motor
Sensors
Sensor name
PE Sensor
(Transmissive photo interrupter)
Scanner Cover Open Sensor (1)
(GMR sensor)
Scanner Cover Open Sensor (2)
(GMR sensor)
PW Sensor
(Reflective photo interrupter)
Duplex Unit Sensor
(Mechanical contact points)
CDR Tray Sensor
(Mechanical contact points)
Photo Tray Sensor
(Mechanical contact points)
EJ Cover Open Sensor
(Electromagnetic plunger)
TROUBLESHOOTING
Table 3-1. Motor resistance and check point
Motor Type
DC motor with brush
4-phase, 96-pole PM stepping motor
Table 3-2. Sensor check point
Check point
Main Board: Pin1-Pin2 of CN9
Main Board: Pin1-Pin2 of CN10
Main Board: Pin2-Pin4 of CN10
Main Board: Pin1-Pin3 of CN6
Main Board: Pin1-Pin2 of CN13
Main Board: Pin1-Pin2 of CN14
Main Board: Pin1-Pin2 of CN12
Main Board: Pin1-Pin2 of CN19
For the position of each sensor/motor, see
C H E C K
.
P O I N T
(p.49)
Check point
Main Board: Pin1-Pin2 of CN21
Main Board: Pin1-Pin2 of CN22
Main Board: Pin1-Pin2 of CN24
Main Board: Pin1-Pin2 of CN49
Main Board: Pin1-Pin3, Pin2-Pin4 of CN25
Signal level
Less than 0.4 V
No paper
More than 2.4 V
Detects the paper
Less than 0.4 V
Scanner Open
More than 2.4 V
Scanner Closed
Less than 0.4 V
Carriage: at HP
More than 2.4 V
Carriage: at the origin position (where the carriage touches the right frame)
0 V (for reference only)
No paper
3.3 V (for reference only)
Detects the paper
Less than 0.4 V
Duplex Unit attached
More than 2.4 V
No Duplex Unit
Less than 0.4 V
Detects CDR Tray
More than 2.4 V
No CDR Tray
Less than 0.4 V
Photo Tray in use
More than 2.4 V
Photo Tray retracted
Conducting
Hold
Breaking
Open
Troubleshooting
Revision C
2.1.3 " Motors & Sensors "
Resistance
19.7 Ω ± 10 %
19.7 Ω ± 10 %
88 Ω ± 15 %
Ω ± 10 %
(TBD)
28.0 Ω ± 7 %/phase (25
o
C)
Switch mode
Confidential
55
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Troubleshooting
