2PR
2-2-3
(2) Switches and sensors
Figure 2-2-2 Switches and sensors
1. Power switch................................................ Turns ON/OFF the AC power source.
2. Interlock switch ............................................ Shuts off 24 V DC power line when the top cover and front cover are
opened.
3. Left cover switch .......................................... Shuts off 24 V DC power line when the left cover is opened.
4. Cassette size switch .................................... Detects the paper size dial setting of the paper setting dial.
5. Paper sensor 1............................................. Detects the presence of paper in the cassette. (Engine PWB)
6. Paper sensor 2............................................. Detects the presence of paper in the cassette. (Engine PWB)
7. Lift limit sensor ............................................. Detects activation of upper limit of the bottom plate in the cassette.
8. Registration sensor ...................................... Detects the timing of primary paper feed.
9. MP tray sensor............................................. Detects the presence of paper on the MP tray.
10. Duplex conveying sensor............................. Detects paper jam in the duplex section.
11. Paper exit sensor ......................................... Detects paper jam in the fuser/paper exit section. (Paper exit PWB)
12. Paper full sensor .......................................... Detects the paper full in the top tray.
13. Toner sensor M ............................................ Detects the toner density in the developing unit M.
14. Toner sensor C............................................. Detects the toner density in the developing unit C.
15. Toner sensor Y............................................. Detects the toner density in the developing unit Y.
16. Toner sensor K............................................. Detects the toner density in the developing unit K.
17. Right ID sensor ............................................ Measures image density for color calibration.
18. Left ID sensor............................................... Measures image density for color calibration.
19. Waste toner full sensor ................................ Detects the waste toner box being full.
20. Fuser pressure change sensor .................... Detects the switching status of the fuser pressure.
21. Front cover open/close switch ..................... Detects open/close front cover.
22. Fuser thermistor 1........................................ Measures the heat roller temperature (left).
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Machine inside
Machine left
Machine right