Ricoh MPC 2800 AT-C2 Field Service Manual page 498

7. Appendix: Electrical Component Defects
Sensor Name/
No.
Sensor Board Name
Sxx Original Length Sensor 3
S39 Scanner HP Sensor
S40 Platen Cover Sensor
Paper Transfer Contact
-
Sensor
Image Transfer Belt
-
Contact Sensor
Junction Paper Jam
S2
Sensor
7
Blown Fuse Conditions
Power Supply Unit
Fuse
115V
FU1 15A/125V
FU2 10A/125V
FU3 2A/250V
FU4 1A/250V
FU5 5A/250V
FU6 2A/250V
142
Activ
e
CN313/2
A
SIO
CN318/2
H
SIO
CN318/5
L
SIO
L CN208/7
L CN208/2
L CN204/6
Rating
220V - 240V
8A/250V No response. (5V power to the PSU is not supplied.)
No response. (5V power to the BICU and controller is not
6.3A/250V
supplied.)
5V power to the scanner heater and tray heater is not
1A/250V
supplied.
1A/250V 5V power to the SIO and heater is not supplied.
5A/250V 5V power to the IOB not supplied.
2A/125V 5VS power to the BICU not supplied.
CN Condition
Open/
Original paper size cannot
be detected.
Shorted
Open SC120
Shorted SC121
Open/
Platen cover open cannot
be detected.
Shorted
Open/
SC452
Shorted
Open/
SC442
Shorted
Open/
Jam C (Jam 24/64)
Shorted
Symptom when turning on the main switch
Symptom