Brother HL-3450CN Service Manual page 246

(4) Remove the set screw ST3x6 (2 pcs.) holding the power inlet base.
(5) Remove the set screw M4x6 complete with the shakeproof washer to release the ground
wire.
Power inlet base
(6) Disconnect the connectors (4 pcs.) from the low-voltage power supply PCB.
(7) Remove the set screws ST3x6 (3 pcs.) from the low-voltage power supply unit frame.
(8) Remove the low-voltage power supply unit complete with the frame.
Low-voltage power
supply unit
The ground wire is very important for the safety of users.
Upon replacement of the low-voltage power supply unit, confirm that the ground wire (green
and yellow color) is securely connected to the
and the screw is tightly fastened.
Ground wire
Fig. 7-56
Fig. 7-57
WARNING
connector, the shakeproof washer is fitted
7-39
HL-3450CN SERVICE MANUAL