Epson Artisan 730 - Troubleshooting; Motor and Sensor Troubleshooting

Epson Artisan 810/835/837/710/725/730/Epson Stylus Photo PX810FW/TX810FW/PX820FWD/TX820FWD/PX830FWD/PX710W/TX710W/PX720WD/TX720WD/PX730WD/TX730WD Revision G
TROUBLESHOOTING Troubleshooting 62
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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.
 Sensors
 Power Supply Voltage
C H E C K
P O I N T
For the position of each sensor/motor, see "2.1.3 Motors & Sensors"
(p.50).
Table 3-1. Motor resistance and check point
Motor Motor Type Check point Resistance
CR motor
DC motor with brush
Main Board: Pin1-Pin2 of CN21 19.7 Ω ± 10%
PF motor Main Board: Pin1-Pin2 of CN22 19.7 Ω ± 10%
Decompression motor Main Board: Pin1-Pin2 of CN24 88 Ω ± 15%
Scanner motor Main Board: Pin1-Pin2 of CN49 (TBD) Ω
ADF motor 4-phase, 96-pole PM stepping motor Main Board: Pin1-Pin3, Pin2-Pin4 of CN25 28.0 Ω ± 7%/phase (25
o
C)
Table 3-2. Sensor check point
Sensor name Check point Signal level Switch mode
PE Sensor
(Transmissive photo interrupter)
Main Board: Pin1-Pin2 of CN9
Less than 0.4 V No paper
More than 2.4 V Detects the paper
Scanner Cover Open Sensor (1)
(GMR sensor)
Main Board: Pin1-Pin2 of CN10
Less than 0.4 V Scanner Closed
More than 2.4 V Scanner Open
Scanner Cover Open Sensor (2)
(GMR sensor)
Main Board: Pin2-Pin4 of CN10
Less than 0.4 V Carriage: at the origin position (where the carriage touches the right frame)
More than 2.4 V Carriage: at HP
PW Sensor
(Reflective photo interrupter)
Main Board: Pin2-Pin3 of CN6
0 V (for reference only) Detects the paper
3.3 V (for reference only) No paper
Duplex Unit Sensor
(Mechanical contact points)
Main Board: Pin1-Pin2 of CN13
Less than 0.4 V Duplex Unit attached
More than 2.4 V No Duplex Unit
Photo Tray Sensor
(Mechanical contact points)
Main Board: Pin1-Pin2 of CN12
Less than 0.4 V Photo Tray in use
More than 2.4 V Photo Tray retracted
Table 3-3. Power supply voltage and check point
Board Check point Output voltage
Power Supply Board
Pin1-Pin4 of CN2 42.0 V ± 5%
Pin2-Pin5 of CN2 42.0 V ± 5%