Ricoh MP C2504 Field Service Manual page 821

6. Troubleshooting
SC No.
SC503-02
812
Type Error Name/Error Condition/Major Cause/Solution
B 3rd Tray Descent Error (Paper Feed Unit PB3150 (D694))
• Lift motor descent error detection
During tray initialization, the tray base plate is lowered to check the
tray base plate position, and the upper limit sensor is detected
although a predetermined time elapsed, for 3 times consecutively.
(Up to 2 times consecutively, the bank transmits a "tray set
incorrectly" to the main machine.)
• Lift motor error/connector missing
• Upper limit sensor error/connector missing
• Harness broken
• Bank control board defective
• Paper overload
• Foreign object, such as paper scrap, is caught between the paper
feed tray and the tray lift motor
• Paper set incorrectly
Remove the jammed paper or slip of paper from the tray, and check if the
SC occurs by turning the main power OFF then ON. If the SC occurs
again, do the following steps. Check if the SC reoccurs by cycling the
power after each step.
1. Check if all connectors in Tray 3 are connected securely. Reconnect
the connectors if they are disconnected, or loose.
2. Check the harness in Tray 3. Replace the harnesses if it is
disconnected, or damaged.
3. Check if the motor runs, sensors turn OFF/ON, has no overloads,
and is properly driven. Replace the parts if there are any defects.
4. Check if there are any signs of a short circuit. Replace the parts if
there are any defects.