Iod1 Pwb; Control Fan (Ctfan) (Cooling Fan (Ps))/ Interlock Switch (Top) - Brother HL-3450CN Service Manual

4.2.7

IOD1 PWB

(1) Remove the set screws ST3x6 (4 pcs.) from the shield (upper).
(2) Disconnect all the harness connectors (16 pcs.) connected to the IOD1 PWB. Note that
the DCN3 connector is a link plug and need not be removed unless necessary. (Refer to
the figure below.)
(3) Remove the set screws ST3x6 (6 pcs.) from the IOD1 PWB.
(4) Remove the IOD1 PWB.
IOD1 PWB
When handling the IOD1 PWB, take care that no damage is caused due to electrostatic
charges.
4.2.8 Control fan (CTFAN) (Cooling fan (PS)) / Interlock switch (Top) (Paper exit unit)
(1) Remove the ozone filter.
(2) Remove the set screw ST3x6 (1 pc.) to remove the control fan case assembly.
Ozone filter
Shield cover (Upper)
Fig. 7-35
PRECAUTION
Control fan assembly
Fig. 7-36
7-27
HL-3450CN SERVICE MANUAL