Epson Stylus Photo RX640 series, Service Manual

Page: 38 / 103

EPSON Stylus PHOTO RX640/650 Revision A
Troubleshooting Troubleshooting When There is No Error Display 38
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
†
Observation of Trouble and Reference for Remedy
†
Scanner does not operate for initialization
†
Carriage unit does not operate
Table 3-12. Scanner Errors at User Level
Error Cause Remedy
Scanner error • Lamp has burnt out.
• Power is turned on without
unlocking the scanner.
• The scanner carriage is
interfering with any other part.
• Unlock the CR.
• Replace the scanner carriage Assy.
• Remove the obstacle.
Command error Undefined command is detected. When correct command is received, error
status is cancelled.
Turn the power off once and then turn it on
again.
Scanner open Scanner cover is open. Close the cover.
Table 3-13. Observation of Trouble and Reference for Remedy
Observation Description of Trouble
Reference for
Remedy
Even with power turned on, the
machine does not operate. The machine does not operate for
initialization.
Table 3-14
“Fatal error” occurred.
Indication error occurs and it is not
cleared even after power is turned off
once and then turned on again. CR unit does not operate. Table 3-15
CR unit operates but error is indicated. Table 3-16
The fluorescent lamp does not turn on.
Table 3-17
Picture is not read clearly. Picture is not read clearly. Table 3-19
“Communication error”.
Indication error occurs and when
communication with the host is tried
again, “Communication error” recurs. USB interface error
Table 3-10
Table 3-14. Scanner does not operate for initialization
Cause Check Point Yes/No Remedy
Connector is disconnected. 1. Check each connector
for disconnection. Is
there any connector
disconnected?
Yes
Connect the disconnected
connector.
No
Replace the main board.
Table 3-15. Carriage unit does not operate
Cause Check Point Yes/No Remedy
Connector on the Main
Board is disconnected †
Is any of the connectors
(CN5, 12 and 14) on the
Main Board
disconnected?
Yes
Connect the connector.
Faulty carriage moving
mechanism Grease is applied properly?
No
Apply grease at designated
point (
Refer to “6.1.3
Lubrication” (p.79)
†
Does CR motor operate
when power is turned
ON with upper case of
Scanner removed?
†
Does CR unit move with
CR motor removed?
No
Check the carriage moving
mechanism, replace the
relevant parts or remove
and reinstall them.
Defective CR HP Board Replace the CR HP sensor
board
No
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.
No
Replace the CR motor.
Defective main board – – Replace the main board.