Troubleshooting For Scanner - Epson Stylus PHOTO RX640 Service Manual

EPSON Stylus PHOTO RX640/650

3.3.5 Troubleshooting for Scanner

This section describes repair/service for the Scanner mechanism. In troubleshooting,
first identify the trouble at the Assy level based on the observation.
According to the observation as described in Table 3-13, perform the necessary
checking by referring to the appropriate table.
Scanner Errors at User Level
Table 3-12. Scanner Errors at User Level
Error Cause
Scanner error • Lamp has burnt out.
• Power is turned on without
unlocking the scanner.
• The scanner carriage is
interfering with any other part.
Command error Undefined command is detected. When correct command is received, error
Scanner open Scanner cover is open.
Observation of Trouble and Reference for Remedy
Table 3-13. Observation of Trouble and Reference for Remedy
Observation
Even with power turned on, the The machine does not operate for
machine does not operate. initialization.
"Fatal error" occurred. CR unit does not operate.
Indication error occurs and it is not
CR unit operates but error is indicated.
cleared even after power is turned off
The fluorescent lamp does not turn on.
once and then turned on again.
Picture is not read clearly. Picture is not read clearly.
"Communication error". USB interface error
Indication error occurs and when
communication with the host is tried
again, "Communication error" recurs.
Troubleshooting
Remedy
• Unlock the CR.
• Replace the scanner carriage Assy.
• Remove the obstacle.
status is cancelled.
Turn the power off once and then turn it on
again.
Close the cover.
Reference for
Description of Trouble
Remedy
Table 3-14
Table 3-15
Table 3-16
Table 3-17
Table 3-19
Table 3-10
Troubleshooting When There is No Error Display
Scanner does not operate for initialization
Table 3-14. Scanner does not operate for initialization
Cause Check Point
Connector is disconnected. 1. Check each connector
for disconnection. Is
there any connector
disconnected?
Carriage unit does not operate
Table 3-15. Carriage unit does not operate
Cause Check Point
Connector on the Main
Is any of the connectors
Board is disconnected
(CN5, 12 and 14) on the
Main Board
disconnected?
Faulty carriage moving Grease is applied properly?
mechanism
Does CR motor operate
when power is turned
ON with upper case of
Scanner removed?
Does CR unit move with
CR motor removed?
Defective CR HP Board Replace the CR HP sensor
board
Faulty CR motor Disconnect connector CN5
on CR HP sensor board
and measure with a tester
the continuity between pins
2 and 4 and between 1 and
3 on motor side.
Defective main board
Revision A
Yes/No Remedy
Connect the disconnected
Yes
connector.
Replace the main board.
No
Yes/No Remedy
Connect the connector.
Yes
Apply grease at designated
No point ( Refer to "6.1.3
Lubrication" (p.79)
Check the carriage moving
mechanism, replace the
relevant parts or remove
No
and reinstall them.
Replace the CR HP sensor
No
board.
Replace the CR motor.
No
– – Replace the main board.
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