Ricoh MP C307 Field Service Manual page 1102

2.Replacement and Adjustment
If the battery jumper switch is not at the correct position, registering the fax unit will fail.
7.
Attach the new FCU board [A].
8.
Connect one end of the FFC to CN603 of the new fax unit [A].
• This FFC is provided with the new FCU board.
• When inserting the FFC, lift the lever to release the lock and then push the lever to lock.
• Make sure that the blue tapes of the FFC face down and it is not slanted.
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