Control Panel Button Service Check - Lexmark MS312 Service Manual

Action
Step 4
Properly connect all the cables on the controller board.
Does the error remain?
Step 5
Unplug the cable JPS1 from the controller board, and verify the
following voltages from the cable:
•
+5 V at pins 11, 12, 13, 14, 15, 16
•
GND at pins 18, 20
Are the voltages correct?
Step 6
Replace the power supply.
Does the error remain?
Step 7
Is the control panel functioning properly?
Step 8
Perform the control panel service check. Go to
service check" on page
Does the error remain?
Step 9
Is the LED on the bottom of the controller board illuminating?

Control panel button service check

Action
Step 1
Are the control panel display and control panel indicator light
illuminated?
Step 2
POR into the Diagnostics menu and perform a button test:
Diagnostics Menu > HARDWARE TESTS > Button Test
Did the printer pass the test?
"Control panel
155.
Diagnostics and troubleshooting
Yes
The problem is
solved.
Go to step 7.
The problem is
solved.
Go to step 9.
Go to step 9.
Go to step 6.
Yes
Go to step 2.
Go to step 4.
154
4514-330
No
Go to step 5.
Go to step 6.
Contact the next
level of support.
Go to control panel
service check. Go to
"Control panel
service check" on
page 155.
The problem is
solved.
Replace the
controller board. Go
to "Controller board
removal" on
page 223.
No
Perform a control
panel service check.
Go to "Control panel
service check" on
page 155.
Go to step 3.