Operator Panel (Display Is Dim And Unchanging) Service Check - Lexmark CX310 Service Manual

Actions
Step 3
Enter Diagnostics Menu.
Turn the printer on, press and hold 3 and 6, and release the buttons with
the installed memory and processor speed displays.
Perform the Base Sensor Test. See
a
Select Base Sensor Test, and press Select.
b
Select Fuser Exit Sensor, and press Select.
c
Open the close the front door, and inspect the fuser exit sensor located
on the LVPS shield.
Turn the printer off, and remove the rear cover. See
on page 307.
Turn the printer on, and then click the values below at JBIN1:
Pin 1: 0 V dc (+5 V dc during cycle)
Pin 2: +3.3 V dc beam blocked 0 V dc unblocked
Pin 3: Ground
Are the values correct?

Operator panel (display is dim and unchanging) service check

Replace one of the following components, and perform a POR before replacing a second component. Never replace
both of the components without performing a POR after installing each one, or the printer will be rendered inoperable.
"BASE SENSOR TEST" on page
"Rear cover removal"
Diagnostic information
128
Yes
Problem resolved.
203.
7527
No
Replace the controller
board. See "Controller
board removal" on
page 309.