Brother HL-4040CN Service Manual page 234

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.
Power supply switch
- When assembling the PS PCB unit, align it with the two Bosses on the Frame unit.
Frame unit
Boss
Fig. 3-188
PS PCB unit
Fig. 3-189
3-126
Belt gear plate ASSY
Boss
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