2PS/2PT
2-2-4
(2) Switches and sensors
Figure 2-2-2 Switches and sensors
1. Main power switch (MSW) .................... Turns ON/OFF the AC power source.
2. Interlock switch (ILSW) ......................... Shuts off 24 V DC power line when the top tray and rear cover are
opened.
3. Cassette size switch (CSSW) ............... Detects the paper size dial setting of the paper setting dial.
4. Paper sensor 1 (PS1) ........................... Detects the paper remaining amount level.
5. Paper sensor 2 (PS2)*.......................... Detects the paper remaining amount level.
6. Lift sensor (LS)...................................... Detects activation of upper limit of the bottom plate.
7. Registration sensor (RS)....................... Controls the secondary paper feed start timing.
8. MP paper sensor (MPPS)..................... Detects the presence of paper on the MP tray.
9. MP feed sensor (MPFS) ....................... Detects a paper misfeed in the MP conveying section.
10. Eject sensor (ES).................................. Detects a paper misfeed in the fuser or eject section.
11. Paper full sensor (PFS)* ....................... Detects the paper full in the top tray.
12. Toner sensor K (TS-K) .......................... Detects the toner density in the developing unit K.
13. Toner sensor K (TS-M).......................... Detects the toner density in the developing unit M.
14. Toner sensor K (TS-C).......................... Detects the toner density in the developing unit C.
15. Toner sensor K (TS-Y) .......................... Detects the toner density in the developing unit Y.
16. ID sensor 1 (IDS1) ................................ Measures image density for color calibration.
17. ID sensor 2 (IDS2) ................................ Measures image density for color calibration.
18. Developing release switch
(DEVRSW)............................................ Detects separation of developing units M, C and Y.
19. Waste toner sensor (WTS).................... Detects when the waste toner box is full.
20. Envelope switch (EVSW)...................... Detects the envelope mode setting.
21. Top tray switch (TTSW)......................... Detects the opening and closing of the top tray.
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