Block Diagram - Brother HL-L9300CDW Service Manual

2.4

Block Diagram

Laser unit
BD sensor
PCB ASSY
Polygon motor
Front cover sensor
Back cover sensor ASSY
Waste toner sensor
Blower
Power fan
Fuser fan
Registration mark sensor unit
Registration mark sensor L PCB
Registration mark sensor R PCB
Internal temperature sensor
Center thermistor
Side thermistor
Heater
Fuser unit Fuser unit
Low-voltage power supply
PCB unit
MP registration front sensor
T2 paper tray unit T2 paper tray unit
T2 paper feed/plate origin sensor PCB
T2 registration sensor PCB
T3 paper tray unit T3 paper tray unit
T3 paper feed/plate origin sensor PCB
T3 registration sensor PCB
LD SUB
PCB ASSY
LD PCB ASSY
High-voltage
power supply
PCB ASSY
EL emission
circuit
Toner sensor
(Light emission)
External temperature/
humidity sensor
Main PCB ASSY
Eject
sensor
PCB ASSY
T2 plate motor
T2 solenoid
T3 plate motor
T3 solenoid
Control panel
Panel PCB ASSY
Control panel
Panel control
PCB ASSY
Panel relay
PCB ASSY
Model with touch panel
USB host relay PCB ASSY
Wireless LAN PCB
Toner/new sensor PCB ASSY
(Light reception)
Main drive unit
T1 solenoid
Registration solenoid
Process drive unit
Main motor
Process motor
Develop clutch
Develop release drive unit
Develop release clutch
Develop release sensor PCB ASSY
Paper eject ASSY
Switch back solenoid
Paper eject origin sensor
Paper feed unit
Registration front/rear sensor
PCB ASSY
T1 paper feed sensor PCB ASSY
MP solenoid
MP paper empty/
registration front sensor PCB ASSY
T2 relay
PCB ASSY
T3 relay
PCB ASSY
Fig. 2-3
2-8
Model without touch panel
2Line LCD
Key PCB ASSY
1.8-inch Color LCD
Touch panel
LCD unit
Confidential