Fig. 3-28- Page 64

CHAPTER 3  THEORY OF OPERATION

3-22

Laser

Main PCB

Engine 

PCB

Polygon Motor

Laser Unit

Cover Sensor (A)

Main Motor

Solenoid

Fan Motor

Toner Sensor PCB (light emission)

Toner Sensor PCB (light reception)

Thermistor (for Heat Roller)

Panel PCB

Low-Voltage

Power Supply

PCB

Fixing Unit

Halogen 
Heater 
Lamp

Front Registration 

Sensor

Rear Registration 

Sensor

Upper Paper
Cassette Sensor
(HL-1250/1270N)

Lower Paper
Cassette 
Registration Sensor
(HL-1250/1270N)

High-

Voltage

Power

Supply

PCB

Drum Unit

Primary Charger (Corona Wire)

Primary Charger (Grid)

Supply Roller

Transfer Roller

Development Roller

Network

Board

(HL-1270N)

Cover Sensor (B)

Fig. 3-28