2-90 Service Manual
5061
Operator panel LCD/status LED/buttons service check
Use this service check to check both the operation of the panel buttons and to test the LCD display for correct
operation.
• Replace the operator panel assembly if the LCD display functions normally, but the LED does not come
on.
• If one or more of the operator panel buttons do not operate correctly, go to “Step A.”
If any of the following symptoms occur, go to “Step B” on page 2-101.
• Operator panel LCD is blank/power on/status LED off
• Operator panel LCD is blank/power on/status LED on
• Operator panel LCD displays all diamonds/5 beeps/power on/status LED on
Step A
Step B
Note: Make sure the operator panel cable is seated firmly in J1 on the system board before proceeding with this
step.
Step Actions and questions Yes No
1 Buttons Test—Perform the “Button Test” on
page 3-15.
Do any or all of the buttons fail to operate correctly?
Note: If all the buttons fail to operate correctly, the LCD
display is blank, power on status LED is on, and the
printer beeps 5 times, go step B.
Replace the
operator panel
assembly. See
“Operator panel
assembly
removal” on
page 4-68.
Test passes. No
problem found.
Step Actions and questions Yes No
1 LCD Test—Perform the “LCD Test” on page 3-15.
Can you run the test?
Go to step 2 Go to step 4
2
LCD Test—Does the test pass? Problem resolved Go to step 3
3
Operator panel—Is the operator panel operating
correctly except for a few pixels missing or broken?
Replace the
operator panel
assembly. see
“Operator panel
assembly
removal” on
page 4-68.
Go to step 4
4
Operator panel assembly—Is the operator panel
assembly completely blank and the power on status
LED off?
Go to step 6 Go to step 5
5
Operator panel assembly—Is the operator panel
assembly completely blank and the power on status
LED on?
Go to step 10 Go to step 12
6
Does the printer beep 5 times? Go to step 7 Replace the
operator panel
assembly. See
“Operator panel
assembly
removal” on
page 4-68.
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