Service manual

Epson Stylus Photo PX650/TX650/TX659/PX660/PX660 Premium/Artisan 635 Revision C
TROUBLESHOOTING Troubleshooting When There is No Error Display 59
Confidential
 Carriage operates but error indicated
 LED does not light up
 Picture cannot be read clearly
3.3.6 Troubleshooting for Motors and Sensors
 Motor
 Sensor
Note : Refer to "2.1.2 Motors and Sensors" (p.36) for the locations of the motors and sensors.
Table 3-19. Carriage operates but error indicated
Cause Check Point Yes/No Remedy
Upper case of scanner is
removed.
Upper case of scanner is
removed?
Yes Install the upper case.
Defective main board --- --- Replace the main board
Table 3-20. LED does not light up
Cause Check Point Yes/No Remedy
Connector on the Main
Board is disconnected
Connector CN19 on main
board is disconnected?
Yes
Connect the connector
CN19 on the main board.
Defective CIS Unit
Does the lamp light up when
the CIS Unit is replaced?
Yes Replace the CIS Unit.
Defective main board --- --- Replace the main board
Table 3-21. Picture cannot be read clearly
Cause Check Point Yes/No Remedy
Soiled document table
Is the document table (glass)
free from dirt and wiping
mark?
No Clean the document table.
Defective CIS Unit --- --- Replace the CIS Unit.
Defective main board --- --- Replace the main board
Table 3-22. Motor Resistance and Check Points
Motor Name Location Check Point Resistance
CR motor CN14 (White) Pin 1 & 2 22.7  ±
10%
PF motor CN13 (Black) Pin 1 & 2 21.2  ± 10%
CR motor (Scanner Unit) CN17 (White) Pin 1 & 2 TBD
Table 3-23. Sensor Check
Sensor Name
Location
Signal Level Sensor Status
Epson Stylus
Photo PX650/
TX650/TX659
Epson Stylus
Photo PX660
PE sensor
(3.3V DC ±5% )
CN6 Pin 1 & 3
2.4V or over Paper absent
Less than 0.4V Paper present
APG sensor
(3.3V DC ±5% )
CN7 Pin 1 & 3
2.4V or over PG position
Less than 0.4V Out of PG position
CD-R Guide
sensor
(3.3V DC ±5% )
CN4 Pin 1 & 2 CN4 Pin 1 & 2
Open: 2.4V or over CD-R Guide down
Close: Less than 0.4V CD-R Guide up
CD-R Tray
sensor
(3.3V DC ±5% )
CN4 Pin 3 & 4 CN9 Pin 1 & 2
Open: 2.4V or over CD-R Tray present
Close: Less than 0.4V CD-R Tray absent
Case Open
Sensor
(3.3V DC ±5%)
CN5 Pin 1 & 2
Open: 2.4V or over Scanner Unit open
Close: Less than 0.4V
Scanner Unit closed