Brother International HL-3400CN Service Manual - Page 231
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HL-3400CN 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. Shield cover (Upper) IOD1 PWB Fig. 7-35 APRECAUTION When handling the 1001PWB, take care that no damage is caused due to electrostatic charges. 4.2.8 Control fan (CTFAN) ( ) / 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. Control fan assembly Ozone filter Fig. 7-36 7-27