Control Electronics - Brother MFC8500 Service Manual

3.

CONTROL ELECTRONICS

The hardware configuration of the facsimile equipment is shown below.
VC
connector
PCB *
Line
External TEL NCU PCB
Handset
Hook switch
PCB *
Speaker
SCANNER
UNIT
CIS unit
Scanner
motor
Low-voltage
power supply
PCB
Heater (FU)
lamp
Heater
thermistor
Jam sensor
Heat-fixing unit
1
* Provided on models supporting LAN interface.
2
* Models supporting the video capture are not available now.
3
* Provided on models equipped with a handset.
4
* Provided on models available with a 2nd paper cassette (as an option or standard).
5
* Provided on European models.
LAN
1
board *
Centronics
parallel
interface
2
5
*
3
Main PCB
Engine PCB
(Manual insertion sensor,
registration sensor, and
cassette sensor)
High-voltage
power supply
PCB
Configuration of Facsimile Equipment
Control panel PCB ASSY
USB
Control panel
PCB
(Document
front sensor)
Paper ejection
sensor PCB
(Paper ejection
sensor)
In-casing temperature
sensor (thermistor)
Laser diode
Polygon
motor
2nd cassette
relay PCB *
Main motor
Toner sensor PCBs
(Toner sensor LED,
light-receiver, and
cover sensor)
Fan Solenoid
LASER PRINTING UNIT
III - 12
WWW.OASD.CN
Document
sensor PCB
(Document rear
sensor)
LASER UNIT
2nd paper cassette *
2nd cassette
sensor PCB
(2nd cassette
sensor & 2nd
registration sensor)
4
Solenoid
WWW.OASD.CN
4