Brother DCP-9040CN Service Manual page 282

Assembling Note:
- Assemble the Power supply switch so that the ON/OFF mark on the Power supply switch is
aligned with the ON/OFF mark imprinted on the Belt gear plate ASSY.
- When assembling the PS PCB unit, align it with the two Bosses on the Frame unit.
Frame unit
Boss
Power supply switch
Fig. 3-219
PS PCB unit
Fig. 3-220
3-150
Belt gear plate ASSY
Boss
Confidential