Lexmark X642e Service Manual page 154

7002-xxx
843.xx Error code service check
Service Scanner—flatbed mechanical failure
Other symptoms may include a loud noise from between the flatbed and the printer unit, or a blue screen on the
display.
Note: Check for correct installation of the home sensor cable before proceeding with this service check.
FRU
1 Flatbed scanner CCD drive
shafts
2 Flatbed CCD module
assembly ribbon cable
3 Flatbed CCD module
assembly
4 Flatbed CCD scan motor/
cable
Flatbed interface card
5 Flatbed home sensor cable
Flatbed home sensor
Flatbed interface card
2-116
Service Manual
Action
Check to make sure that both of the CCD drive shafts are correctly
installed. If correct, go to step 2.
Check to make sure that the flatbed CCD module assembly is
connected correctly to both the CCD module and J2 on the scanner
control card. If correct, go to step 3.
Check the flatbed CCD assembly for any signs of damage and for
proper mechanical operation. If any problems are found, replace the
flatbed CCD assembly.
If the flatbed CCD assembly is replaced, it is necessary to perform
scanner registration. See "Scanner registration" on page
Check for correct installation of the CCD scan motor cable to both the
motor and to the flatbed interface card at CN2.
Enter the Diagnostics Menu (turn on MFP while holding 3 and 6),
select SCANNER TESTS, and select Feed Tests.If the motor does
not turn during the scanner Feed Test, check for any signs of binds or
mechanical problems. Repair as necessary. If no problem is found,
go to step 5.
Check to make sure that the home sensor cable is correctly installed
to both the home sensor and to CN4 on the flatbed interface card.
Check for correct operation of the home sensor. If it does not operate
correctly, replace the FRUs in the following order:
• Flatbed interface card. See
removal" on page 4-33.
• Flatbed home sensor. See
page 4-46.
If the problem persists, go to step 6.
"Flatbed interconnect card
"Home sensor removal" on
4-4.