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2-7
Confidential
2.4
Block Diagram
Fig. 2-3
Main PCB ASSY
Registration front/rear sensor PCB
Registration front sensor
Registration rear sensor
Panel PCB ASSY
Error LED
Wireless LAN
PCB ASSY
Drum LED
Toner LED
Ready LED
Go Key
T1 clutch ASSY
REG clutch ASSY
Main motor
Fuser Unit
Center thermistor
Side thermistor
Low voltage power supply PCB
Heater Switch
Paper Edge Sensor PCB
(HL-2250DN/2270DW/
2275DW only)
Paper Edge Sensor
New toner sensor
Polygon motor
Laser unit
Fuser FAN
Back cover/DX
High voltage power supply PCB
Front cover sensor
Paper eject sensor PCB
Paper eject sensor
LD control PCB ASSY
BD sensor