2KR/2KS
2-2-1
2-2 Electrical Parts Layout
2-2-1 Electrical parts layout
(1) PWBs
Figure 2-2-1 PWBs
1. Engine PWB (EPWB)................................... Controls the other PWBs, electrical components and optional devices.
2. Main PWB (MPWB) ..................................... Controls the image processing and operation panel.
3. Power source PWB (PSPWB) ..................... Generates +24 V DC, 5 V DC and 3.3 V DC; controls the fuser heaters.
4. High voltage PWB (HVPWB) ....................... Main charging. Generates developing bias and high voltages for transfer.
5. ISM PWB (ISMPWB) ................................... Controls the scanner section.
6. Inverter PWB (INPWB) ................................ Controls the exposure lamp.
7. ISC PWB (ISCPWB) .................................... Controls the shading correction and AGC of CCD.
8. CCD PWB (CCDPWB)................................. Reads the image of originals.
9. Main operation PWB (OPWB-M) ................. Controls touch panel and LCD indication.
10. Right operation PWB (OPWB-R) ................. Consists of the operation keys and display LEDs.
11. Left operation PWB (OPWB-L) .................... Consists of the operation keys and display LEDs.
12. Upper operation PWB (OPWB-U)................ Consists of the operation keys and display LEDs.
13. Front operation PWB (OPWB-F).................. Consists of the display LEDs.
14. LCD inverter PWB (LINPWB) ...................... Controls LCD back light.
15. LCD PWB (LCDPWB).................................. Controls LCD indication.
16. Interface PWB (INPWB)............................... Consists of wiring relay circuits.
17. APC PWB (APCPWB) ................................. Generates and controls the laser beam.
18. PD PWB (LDPWB)....................................... Detects horizontal synchronizing timing of laser beam.
Machine front
Machine inside
Machine rear
3
1
2
4
16
11
15
7
6
12
21
8
10
13
9
14
19
18
20
17
5
Y111960-2 Service Manual
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