Lcd Assembly Display Service Check - Lexmark P122 Photo Jetprinter Service Manual

4102-P01
Operator Panel Button Service Check
Parts / FRUs
1 Buttons
System Board

LCD Assembly Display Service Check

Parts / FRUs
1 LCD Assembly
System Board
Action
If the LCD display is OK, but the buttons do not
"Button Test" on page 3-2
function, run the
any of the buttons fail, replace the top cover/
buttons/key PCB w/label assembly. If the symptom
remains, replace the system board.
Action
If the LCD assembly is blank and the printer
completes POST, check the system board cable
connections. Check for a voltage reading of
approximately +4 V dc on pin 15 at connector
J631. If the voltage is correct, replace the LCD
assembly. If the voltage is incorrect, replace the
system board.
If all diamonds are displayed after the printer
completes POST, check the LCD assembly cable
for continuity and replace the LCD assembly if
necessary. Unplug power supply to the machine
and replug. If diamonds remain, replace the
system board.
"LCD Test," on page 3-2
Run the
does not show all pels, replace the LCD assembly.
. If the test
Diagnostic Information
. If
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