Service manual

Epson Stylus Photo PX650/TX650/TX659/PX660/PX660 Premium/Artisan 635 Revision C
TROUBLESHOOTING Troubleshooting When There is No Error Display 58
Confidential
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 3-16, 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 3-15. Scanner Errors at User Level
Error Cause Remedy
Scanner error
• Defective CIS unit
• Defective scanner motor
• The scanner carriage is
interfering with any other part.
• Replace the scanner CR Unit.
• 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 3-16. 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 3-17
“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 3-18
CR unit operates but error is
indicated.
Table 3-19
The LED does not light up. Table 3-20
Picture is not read clearly. Picture is not read clearly. Table 3-21
“Communication error”.
Indication error occurs and when
communication with the host is tried
again, “Communication error” recurs.
USB interface error Table 3-13
Table 3-17. Scanner does not operate for initialization
Cause Check Point Yes/No Remedy
Connector is
disconnected.
Check each connector for
disconnection. Is there any
connector disconnected?
Yes
Connect the disconnected
connector.
No Replace the main board.
Table 3-18. Carriage unit does not operate
Cause Check Point Yes/No Remedy
Connector on the Main
Board is disconnected
 Is any of the connectors
(CN17, 19 and 20) on the
Main Board disconnected?
Yes Connect the connector.
Faulty carriage moving
mechanism
 Grease is applied
properly?
No
Apply grease at designated
point
1. Does CR motor operate
when power is turned ON
with upper case of Scanner
removed?
2. Does CR unit move with
CR motor removed?
No
Check the carriage moving
mechanism, replace the
relevant parts or remove
and reinstall them.
Faulty CR motor
 Disconnect the connector
(CN17) of the CR Motor
from the Main Board, and
check continuity between
pin 1 and pin 2 on the
motor side, using a circuit
tester.
No Replace the CR motor.
Defective main board --- --- Replace the main board.