Block Diagram - Brother DCP-L8400CDN Service Manual

2.4

Block Diagram

Laser unit
BD sensor
PCB ASSY
Polygon motor
Front cover sensor
Back cover sensor ASSY
High-voltage power
Waste toner
supply PCB ASSY
sensor
EL emission circuit
Blower
Power fan
External temperature/
Fuser fan
humidity sensor
Registration mark sensor unit
Registration mark sensor L PCB
Registration mark sensor R PCB
Internal temperature sensor
Center thermistor
Side thermistor
Heater
Fuser unit
Low-voltage power supply
PCB unit
MP registration front sensor
ADF unit
ADF cover/document
detection sensor PCB
First side document scanning
position sensor PCB
Second side document scanning
position sensor PCB
ADF motor
Second side CIS unit
MP paper empty/registration
front sensor PCB ASSY
T2 paper tray unit
T2 paper feed/
plate origin sensor PCB
T2 registration sensor PCB
T2 plate motor
T2 solenoid
LD SUB
PCB ASSY
LD PCB ASSY
Toner sensor
(Light emission)
Eject
sensor
PCB
ASSY
T2 relay
PCB ASSY
Control panel ASSY
Panel control
PCB ASSY
USB host relay PCB ASSY
Wireless LAN PCB
Toner/new sensor
PCB ASSY
Main drive unit
Registration solenoid
Process drive unit
Main PCB
Develop release drive unit
ASSY
Develop release sensor
PCB ASSY
Paper eject ASSY
Paper feed unit
Registration front/rear
sensor PCB ASSY
T1 paper feed sensor PCB ASSY
Document scanner unit
Document scanner motor
Fig. 2-5
2-11
NFC PCB ASSY
Key PCB ASSY
Touch panel
Color LCD
T1 solenoid
Main motor
Process motor
Develop clutch
Develop release clutch
Switch back solenoid
Paper eject origin sensor
MP solenoid
First side CIS unit
Speaker
Confidential