This error indicates a mismatch between the operator panel assembly and the system board.
Actions Yes No
Step 1
For CX310 models, has the operator panel with UICC card been replaced
recently?
For CX410 and CX510 models, has the UICC card been replaced recently?
Replace the operator
panel assembly with a
new, and not
previously installed,
UICC card.
Go to step 2.
Step 2
Has the controller board been replaced recently?
Replace the controller
board with a new, and
not previously
installed, controller
board. See
“Controller
board removal” on
page 309.
Go to step 3.
Step 3
Turn the printer power off for ten or more seconds. Then, turn the printer
back on (POR the printer).
Is the error gone, and can the printer print?
Problem solved. Go to step 4.
Step 4
Clear the NVRAM of the printer:
a Turn the printer power off.
b With the printer off, press and hold 6,7, and 8 on the keypad.
c Turn the printer on.
d When Restoring Factory Defaults appears, release the
buttons.
Note: If the printer looks up on the Restoring Factory Defaults, then
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.
Does the error message still appear?
Go to step 5. Problem solved.
Step 5
For CX310 models replace the operator panel with UICC card.
For CX410 and CX510 models, replace the UICC card.
Does the error message still appear?
Replace the controller
board. See
“Controller
board removal” on
page 309.
Problem solved.
Invalid firmware/controller board service check
Action Yes No
Update the firmware.
Note: Contact the next level of support for the correct firmware level.
Does the error remain?
Replace the controller
board. See
“Controller
board removal” on
page 309.
The problem is solved.
7527
Diagnostic information
115
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