Troubleshooting For Motors And Sensors - Epson Stylus PHOTO RX640 Service Manual

EPSON Stylus PHOTO RX640/650
Carriage operates but error indicated
Table 3-16. Carriage operates but error indicated
Cause Check Point
Upper case of scanner is Upper case of scanner is
removed. removed.?
Defective main board
Defective CR HP sensor
Fluorescent lamp does not turn on
CCD Unit
Table 3-17. Fluorescent lamp does not turn on
Cause Check Point
Connector on the Main Connector CN12 on main
Board is disconnected board is disconnected?
Defective lamp or Inverter Does the lamp light up
Board when the CCD Unit is
replaced?
Defective main board
TPU Unit
Table 3-18. Fluorescent lamp does not turn on
Cause Check Point
Connector is disconnected Is the connector (CN13) on
the Main Board or either of
the connectors (CN1 and 2)
on the Inverter Board
disconnected?
Defective or life-expired Does the lamp light up
lamp when it is replaced?
Defective Inverter Board Is problem solved when the
Inverter Board is replaced?
Defective main board
Troubleshooting
Yes/No Remedy
Install the upper case.
Yes
– – Replace the main board
Replace the CR HP sensor
– –
board.
Yes/No Remedy
Connect the connector
Yes
CN12 on the main board.
Replace the CCD Unit.
Yes
– – Replace the main board
Yes/No Remedy
Connect the connector
Yes
Replace the TPU Case
Yes
Assy.
Replace the Inverter Board.
Yes
– – Replace the main board
Troubleshooting When There is No Error Display
Picture can not be read clearly
Table 3-19. Picture can not be read clearly
Cause Check Point
Soiled document table Is the document table
(glass) free from dirt and
wiping mark?
Defective CCD Unit
Defective main board

3.3.6 Troubleshooting for Motors and Sensors

Motor
Table 3-20. Motor Resistance and Check Points
Motor Name
CR motor CN3 (White)
PF motor CN4 (Black)
CR motor (Scanner Unit) CN5 (White)
Sensor
Table 3-21. Sensor Check
Sensor Name Location
PE sensor CN10 Pin 2 & 3
APG sensor CN9 Pin 2 & 3
CD-R Guide sensor
CN11 Pin 1 & 2
Pin 3 & 4
CD-R Tray sensor
Note : Refer to "2.1.2 Motors and Sensors" (p.17)
Revision A
Yes/No Remedy
Clean the document table.
No
– – Replace the CCD Unit.
– – Replace the main board
Location Check Point Resistance
Pin 1 & 2 24.4Ω ± 10%
Pin 1 & 2 27.5Ω ± 10%
Pin 1 & 3
Pin 3 & 4
Signal Level Sensor Status
2.4 V or over Paper absent
Less than 0.4 V Paper present
PG position
2.4 V or over
Less than 0.4 V Out of PG position
Open:
CD-R Tray present
2.4 V or over
Close:
CD-R Tray absent
Less than 0.4 V
Open:
CD-R Guide down
2.4 V or over
Close:
CD-R Guide up
Less than 0.4 V
for the locations of the motors and sensors.
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