Block Diagram - Brother HL-4140CN Service Manual

2.4

Block Diagram

Front cover sensor
Toner/New sensor PCB
Drum position sensor PCB
Develop release sensor PCB
T1 registration front/rear sensor PCB
MP paper empty/registration front sensor PCB
T1 paper edge sensor PCB
T2 sensor PCB
T2 registration sensor PCB
Plate motor
T2 solenoid
Low-voltage power supply PCB
Polygon motor
Belt unit temperature sensor
Internal temperature sensor
Center thermistor
Side thermistor
Fuser unit
T2 Relay
PCB ASSY
Paper tray 2
LD PCB
Laser unit
Paper eject
sensor PCB
Engine PCB
Paper eject unit
EL emission circuit
Toner sensor
(emission)
High-voltage
power supply PCB
CPU
External temperature/
humidity sensor
Main PCB
Fig. 2-4
2-8
Develop drive motor
PF drive motor
Drum drive motor
Develop release motor
T1 paper pick-up solenoid
MP paper pick-up solenoid
Registration solenoid
Mono solenoid
Paper eject motor
Back cover sensor
Waste toner sensor
Shutter solenoid
Fuser fan
Blower
Power fan
LCD
Panel PCB
Back light module
USB host relay PCB
Wireless LAN PCB
Registration mark L PCB
Registration mark R PCB
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