Ricoh MP C6502SP Field Service Manual page 1175

SC No. Level
SC665-03 D
Error Name/Error Condition/Major Cause/Solution
FFC set detection (Error between IOB and PFB)
The HORUS port on the BCU is used for FFC connection detection to
detect FFC (harness) disconnection and loose connection between IOB
and PFB. By checking the voltage level of the AD terminal, the connection
status can be checked.
Details:
• When the harness between IOB and PFB becomes disconnected,
the number of parallelly connected resistors changes and therefore
the voltage input to the AD terminal changes.
• FFC harness between IOB and PFB broken
• FFC harness between IOB and PFB not connected fully
• BCU damaged
• IOB damaged
• PFB damaged
• Replace the FFC harness between IOB and PFB.
• Reconnect the FFC harness between IOB and PFB.
• Replace the BCU board.
• Replace the IOB.
• Replace the PFB.
Service Call 620-689
1173