Ricoh Pro 8310 - 1 St Tray Upper Limit Error (Cover Interposer Tray); Sc740-12

1.SC Codes
305
SCs occur.
2. Check the bottom plate position when the power of the machine is turned on.
Check if there is a clicking sound from inserting and withdrawing the coupling of the 1st lift motor.
The SC only occurs at the 5th time.
A: The bottom plate is not at the lower limit position. The 1st lift motor does not rotate and the
bottom plate does not move after the machine is turned off and on.
B: The bottom plate is not at the lower limit position. The 1st lift motor rotates but the bottom plate
is not lowered.
C: The bottom plate is shifted to the lower limit position but the 1st lift motor does not stop.
Cause: A
 1st lift motor connector is disconnected/half-inserted, or defective.
 1st lift motor harness with the relay connectors is disconnected/half-inserted, or the harness is
damaged.
 1st lower limit sensor is defective.
Cause: B
 Gear and coupling of the 1st lift motor are defective.
 Bottom plate rise mechanism parts in the paper feed tray are defective.
Cause: C
 1st lower limit sensor is disconnected/half-inserted, or the harness is damaged.
 1st lower limit sensor, sensor bracket is defective.
 Main controller board is defective.
3. Check that the 1st lift motor connector is connected correctly.
4. Replace the 1st lift motor.
5. Check that the 1st lift motor harness with the relay connectors is connected correctly.
6. Replace the relay harness of the 1st lift motor.
7. Replace the 1st lower limit sensor.
8. Replace the gear and coupling of the 1st lift motor.
9. Check the bottom plate rise mechanism parts in the paper feed tray, and replace them as
necessary.
10. Check if the 1st lower limit sensor connector is disconnected or half-inserted, and if the harness is
damaged.
11. Replace the 1st lower limit sensor and the sensor bracket.
12. Replace the main controller board.
SC740-12
Error Name
1st Tray Upper Limit Error (Cover Interposer Tray)