Brother International HL-3400CN Service Manual - Page 83
Developing
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CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS (2) Motors (Refer to Fig.4-30.) No. Name 1 Main motor 2 Developing motor (Developer drive motor) Code MM DM Function To drive the OPC belt and the paper transport system. To drive the toner cartridge and the developing system. 3 Scanner motor SCM To scan the laser beam 4 Ozone fan motor (Cooling fan motor) 5 Fuser fan motor (Cooling fan motor) 6 Controller fan motor (Cooling fan motor) 7 Interlock switch 7-1 Front cover switch 7-2 Top cover switch 7-3 Rear access cover (TR unit cover) switch OZFAN To exhaust the ozone from the (OZ) printer (charger unit). HTFAN (EX) CTLFAN (PS) To exhaust the heat of the fusing unit. To exhaust the heat of the power supply unit and Interface Controller. DSW1 DSW2 DSW3 These are the safety interlock switches that operate when the covers are opened. Layout of Motors 5. Fuser fan motor 7-2. Top cover switch 6. Controller fan motor 4. Ozone fan motor 1. Main Motor 2. Developing motor 7-3. Rear access cover switch 3. Scanner motor 7-1. Front cover switch Fig. 4-30 4-32