Action Yes No
Step 8
Perform the control panel service check. Go to
“Control panel
service check” on page 207.
Does the error remain?
Go to step 9. The problem is
solved.
Step 9
Is the LED on the bottom of the board illuminating?
Go to step 10. Replace the
controller board. Go
to
“Controller board
removal” on
page 299.
Step 10
Verify the controller board power outputs. See
“Controller board”
on page 411 for voltages from the controller.
Are the voltages correct?
Contact the next
level of support.
Replace the
controller board. Go
to
“Controller board
removal” on
page 299.
Control panel service check
Warning—Potential Damage: Do not replace the control panel and controller board at the same time. Each
card contains the printer settings. When either of these cards is new, it obtains some of the settings from the
other card. Settings are lost when both are new and replaced at the same time.
Action Yes No
Step 1
Check the connections on the UICC and controller board for
proper connections.
Are they properly connected?
Go to step 3. Go to step 2.
Step 2
Properly connect the connectors.
Did this fix the problem?
The problem is
solved.
Go to step 3.
Step 3
Is the display blank but the LEDs on the panel are functioning?
Go to step 4. Go to step 5.
Step 4
Replace the display. See
“Display removal (MX410, MX51x)” on
page 322.
Does the error remain?
Go to step 5. The problem is
solved.
Step 5
Replace the cable connecting the UICC to the controller board.
Does the error remain?
Go to step 6. The problem is
solved.
7015
Diagnostics and troubleshooting
207
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