1. Main PWB (MPWB)
2. Engine PWB (EPWB)
3. High Voltage PWB (HVPWB)
4. Power source PWB (PSPWB)
5. Power source PWB ā sub (PSBWB-S)
6. Operation panel PWB main (OPPWB-M)
7. Operation panel PWB left (OPPWB-L)
8. Operation panel PWB right (OPPWB-R)
9. LCD-PWB (LCDPWB)
10. LCD relay PWB (LCDRPWB)
11. CCD PWB (CCDPWB)
12. APC PWB (APCPWB)
13. BD PWB (BDPWB)
14. DRUM PWB (DRPWB)
15. Drum relay PWB (DRRPWB)
16. Developing PWB (DEVPWB)