Switches and sensors

No.	Name	No.	Name
1	DF open/close sensor (S3)	21	Registration sensor 2 (S14)
2	DF original timing sensor (S5)	22	Duplex sensor 2 (S17)
3	DF registration sensor (S2)	23	Bypass paper end sensor (S9)
4	DF original back-side timing sensor (S19)	24	Paper end sensor 2 (S12)
5	DF exit sensor (S4)	25	Paper end sensor 1 (S11)
6	DF Interlock switch (SW4)	26	Waste toner full sensor (S18)
7	DF original sensor (S1)	27	Rear cover switch (SW1)^*2
8	Fusing thermistor 2 (Center) (TS2)	28	Finisher paper sensor (S23)^*1
9	Fusing thermistor 1 (End) (TS1)	29	Finisher tray lower limit sensor (S22)^*1
10	Fusing sensor (S15)	30	Finisher gathering roller HP sensor (S21)^*1
11	Registration sensor 1 (S13)	31	Scanner HP sensor (S6)
12	Toner sensor	32	Finisher shift roller HP sensor (S20)^*1
13	Paper exit full sensor (S8)	33	Finisher jogger fence HP sensor (S24)^*1
14	Finisher interlock switch (SW6)^*1	34	Finisher paper exit sensor (S26)^*1
15	Duplex sensor 1 (S16)	35	Finisher entrance sensor (S28)^*1
16	Envelope sensor (S10)	36	Finisher staple tray paper sensor (S25)^*1
17	Interlock switch (SW3)	37	Relay sensor^*1
18	Paper feed tray size switch (SW2)	38	Rear cover switch (SW5)^*1
19	Main power switch PCB (PCB1)	39	Finisher Exit Guide Plate HP Sensor (S27)*1
20	Paper feed tray limit sensor (S7)	-	-

*1 IM 600SRF only.

*2 IM 550F/600F only.

No.	Name	No.	Name
1	Toner density sensor PCB (PCB8)	11	Main power switch PCB (PCB1)
2	Rear cover switch (SW1)	12	Paper feed tray size switch (SW2)
3	Fusing thermistor 1 (End) (TS1)	13	Duplex sensor 2 (S17)
4	Fusing thermistor 2 (Center) (TS2)	14	Registration sensor 2 (S14)
5	Fusing sensor (S15)	15	Paper end sensor 2 (S12)
6	Paper exit full sensor (S8)	16	Paper end sensor 1 (S11)
7	Duplex sensor 1 (S16)	17	Registration sensor 1 (S13)
8	Envelope sensor (S10)	18	Bypass paper end sensor (S9)
9	Interlock switch (SW3)	19	Waste toner full sensor (S18)
10	Paper feed tray limit sensor (S7)