Lcd Touchscreen Contrast Control Service Check-Model X642E; Lcd Touchscreen Display Service Check-Models X644E/X646E - Lexmark X642e Service Manual

LCD touchscreen contrast control service check—model X642e
Note: If the contrast control only works over part of its travel, replace the left operator panel cover assembly.
See "Operator panel left cover assembly removal" on page
FRU
1 UICC card #1 to UICC
card #3 cable (UICC 8-pin
cable)
2 UICC card #1 to UICC
card #3 cable (UICC 8-pin
cable)
3 Operator panel left cover
assembly
LCD touchscreen display service check—models X644e/X646e
LCD touchscreen display complete dark operator panel LED on
CAUTION
When you see this symbol, there is a danger from hazardous voltage in the area of the product
where you are working. Unplug the product before you begin, or use caution if the product
must receive power in order to perform the task.
Note: The LCD touchscreen display can be checked by entering the Diagnostics Menu, selecting HARDWARE
TESTS, and running the Panel Test.
FRU
1 LCD inverter 8-pin cable
2 LCD inverter 8-pin cable
4-61.
Action
Check the cable for correct installation to J1 on UICC card #3 and to
J14 on UICC card #1 (operator panel card).
Check continuity of the UICC 8-pin cable. If correct, go to step 3. If
incorrect, replace the cable.
Replace the operator panel left cover assembly. See
panel left cover assembly removal" on page
fix the problem, replace the operator panel right cover assembly. See
"Operator panel right cover assembly removal" on page
Action
Check the inverter 8-pin cable for correct installation to the operator
panel card (J13) and to the LCD inverter card (CN1) assemblies. If no
problem is found, go to step 2.
Check continuity of the inverter 8-pin cable. If incorrect, replace the
cable. If correct, go to step 3.
7002-xxx
"Operator
4-61. If this does not
4-64.
2-149
Diagnostic information