Ricoh D027 MPC4000 AP-C2

• The CN numbers in the following table are the connector numbers on the IOB.

Sensors

No.	Sensor Name/ Sensor Board Name	Active	CN	Condition	Symptom
SW1	Right Door Open Switch	L	CN204/1	Open	"Open Cover" is displayed.
				Shorted	"Open cover" cannot be detected.
S10	Duplex Door	L	CN232/B9	Open	"Open Cover" is displayed.
				Shorted	"Open cover" cannot be detected.
S1	ID Sensor: M	A	CN211/ 7, 11	Open/ Shorted	SC400
	ID Sensor: C	A	CN211/ 8, 12	Open/ Shorted
	ID Sensor: Y	A	CN211/ 9, 13	Open/ Shorted
	ID Sensor: Front	A	CN211/1	Open/ Shorted	SC258
	ID Sensor: Center and K	A	CN211/2	Open/ Shorted	SC400 / SC258
	ID Sensor: Rear	A	CN211/3	Open/ Shorted	SC258
S13	Registration Sensor	L	CN224/A2	Open	Jam A (Jam8, 17)
				Shorted	Jam A, B (Jam1)
S31	Drum Gear Position Sensor-K	H	CN222/A2	Open/ Shorted	SC380/SC396
S32	Drum Gear Position Sensor-M	H	CN222/ A5	Open/ Shorted	SC380/SC397
S33	Drum Gear Position Sensor-C	H	CN222/ A8	Open/ Shorted	SC380/SC398
S34	Drum Gear Position Sensor-Y	H	CN222/ A11	Open/ Shorted	SC380/SC399
S27 S28 S29 S30	Toner End Sensor - K Toner End Sensor - Y Toner End Sensor - C Toner End Sensor - M	L	CN207/A1 CN207/B9 CN207/ B12 CN207/ B15	Open	Toner end cannot be detected.
				Shorted	Toner end is detected when there is enough toner.
S52	Image Transfer Belt Rotation Sensor	H/L	CN208/11	Open/ Shorted	SC443
S20	Vertical Transport Sensor 1	L	CN230/A7	Open	Jam A (Jam3, 11)
				Shorted	Jam A, B (Jam1)
S21 S25	Paper End Sensor 1, 2	L	CN230/ A10, B10	Open	Paper end is not detected when there is no paper in the paper tray.
				Shorted	Paper end is detected when there is paper in the paper tray.
S22 S26	Paper Lift Sensor 1,2	H	CN230/ A13, B13	Open/ Shorted	SC501, SC502