2-138 Service Manual
7526
956.xx—System board failure service check
7
Clear the NVRAM of the printer.
1. Turn the printer power off.
2. With the printer off, press and hold the 2,
6, 7, and 8 buttons.
3. Turn the printer power on.
4. When the message Restoring Factory
Defaults displays, release the buttons.
If the MFP locks up on the Restoring Factory
Defaults message, wait two minutes, and then
turn the printer power off. After ten seconds or
more, turn the printer power back on without
holding down any buttons.
Was the NVRAM cleared?
Problem resolved. Go to step 8.
8
Replace the UICC card. See “UICC card
removal” on page 4-194.
Warning: Only install a UICC card that was
not previously installed on other machines.
Does this fix the problem?
Problem resolved. Go to step 9.
9
Replace the system board. See “System
board removal” on page 4-165.
Warning: Only install a system board that
was not previously installed on other
machines.
Does this fix the problem?
Problem resolved. Contact your next level of
support.
Step Questions / actions Yes No
1 1. Turn the printer off.
2. Remove the rear frame cover. See “Rear
frame cover removal” on page 4-37.
3. Check the cable in connector J49 (A) for
proper connection to the system board.
Is the cable seated correctly?
Replace the system board.
See “System board
removal” on page 4-165.
Reseat the cable.
Step Questions / actions Yes No
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