Brother HL-4140CN Service Manual page 272

(5) Release the eight Hooks to remove the High-voltage power supply PCB ASSY from the Base
frame unit.
(6) Disconnect the two Connectors (CN6, CN7).
Base frame unit
6
6
CN6
<Right side>
(7) Release the Hook to remove the High-voltage power supply shield ASSY from the
High-voltage power supply PCB ASSY.
High-voltage power supply PCB ASSY
High-voltage power supply PCB ASSY
5
High-voltage power supply
PCB ASSY
CN7
Hook
Fig. 3-170
Fig. 3-171
3-124
Hook
Hook
Hook
Hook
High-voltage power supply shield ASSY
Confidential