Epson Stylus Photo RX640 series, Service Manual

Page: 39 / 103

EPSON Stylus PHOTO RX640/650 Revision A
Troubleshooting Troubleshooting When There is No Error Display 39
†
Carriage operates but error indicated
†
Fluorescent lamp does not turn on
„
CCD Unit
„
TPU Unit
†
Picture can not be read clearly
3.3.6 Troubleshooting for Motors and Sensors
†
Motor
†
Sensor
Note : Refer to “2.1.2 Motors and Sensors ” (p.17) for the locations of the motors and sensors.
Table 3-16. 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
Defective CR HP sensor
– –
Replace the CR HP sensor
board.
Table 3-17. Fluorescent lamp does not turn on
Cause Check Point Yes/No Remedy
Connector on the Main
Board is disconnected Connector CN12 on main
board is disconnected?
Yes
Connect the connector
CN12 on the main board.
Defective lamp or Inverter
Board Does the lamp light up
when the CCD Unit is
replaced?
Yes
Replace the CCD Unit.
Defective main board – – Replace the main board
Table 3-18. Fluorescent lamp does not turn on
Cause Check Point Yes/No Remedy
Connector is disconnected Is the connector (CN13) on
the Main Board or either of
the connectors (CN1 and 2)
on the Inverter Board
disconnected?
Yes
Connect the connector
Defective or life-expired
lamp Does the lamp light up
when it is replaced?
Yes
Replace the TPU Case
Assy.
Defective Inverter Board Is problem solved when the
Inverter Board is replaced?
Yes
Replace the Inverter Board.
Defective main board – – Replace the main board
Table 3-19. Picture can not 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 CCD Unit – – Replace the CCD Unit.
Defective main board – – Replace the main board
Table 3-20. Motor Resistance and Check Points
Motor Name Location Check Point Resistance
CR motor CN3 (White) Pin 1 & 2 24.4
Ω
± 10%
PF motor CN4 (Black) Pin 1 & 2 27.5
Ω
± 10%
CR motor (Scanner Unit) CN5 (White)
Pin 1 & 3
Pin 3 & 4
Table 3-21. Sensor Check
Sensor Name Location Signal Level Sensor Status
PE sensor CN10 Pin 2 & 3
2.4 V or over Paper absent
Less than 0.4 V Paper present
APG sensor CN9 Pin 2 & 3
2.4 V or over
PG position
Less than 0.4 V Out of PG position
CD-R Guide sensor
CN11 Pin 1 & 2
Pin 3 & 4
Open:
2.4 V or over
CD-R Tray present
Close:
Less than 0.4 V
CD-R Tray absent
CD-R Tray sensor
Open:
2.4 V or over
CD-R Guide down
Close:
Less than 0.4 V
CD-R Guide up