Brother International MFC-7050C Service Manual - Page 24

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3. CONTROL ELECTRONICS 3.1 Configuration The hardware configuration of the facsimile equipment is shown below. 12-pin NCU PCB -.- Line • External telephone -I.- Handset 2-pin 2-pin 2-pin 2-pin 2-pin 6-pin Main PCB*l 7-pin -I Control panel PCB CIS unit 5-pin Scanner motor Video PCB Video signal Cover sensor PCB*2 Hook switch PCB*3 Speaker Battery Documentsensor PCB*4 SCANNER UNIT 23-pin 23-pin 4-pin 4-pin 4-pin 7-pin 8-pin 10-pin 11-pin Sensor FPC Ink cartridges -FINK JET LPRINTER UNIT Carrier transport motor Paper feed motor Ink empty *6 sensor PCB LI LI LI Interface PCB 6-pin 36-pin Centronics interface Power supply PCB *1 On the main PCB 's the registration sensor. *2 On the cover sensor PCB is the cover sensor. *3 On the hook switch PCB is the hook switch sensor. *4 On the document sensor PCB are these sensors: • Document front sensor (PH1) • Document rear sensor (PH2) *5 On the sensor FPC is the carrier home position sensor. *6 On the ink empty sensor PCB is the ink empty sensor. Configuration of Facsimile Equipment III - 13

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3.
CONTROL
ELECTRONICS
3.1
Configuration
The
hardware
configuration
of
the
facsimile
equipment
is
shown
below.
12
-pin
2
-pin
2
-pin
2
-pin
2
-pin
2
-pin
6
-pin
Main
PCB*l
7
-pin
5
-pin
23
-pin
23
-pin
4
-pin
4
-pin
4
-pin
7
-pin
8
-pin
10
-pin
11
-pin
NCU
PCB
Video
PCB
•
—.-
Line
External
telephone
—I.-
Handset
Video
signal
Cover
sensor
PCB*
2
Hook
switch
PCB*
3
Speaker
Battery
—I
Control
panel
PCB
Document
sensor
PCB*
4
CIS
unit
Scanner
motor
Sensor
FPC
Ink
cartridges
Carrier
transport
motor
Paper
feed
motor
SCANNER
UNIT
—
FINK
JET
LPRINTER
UNIT
Ink
empty
*
6
sensor
PCB
LI LI LI
Interface
PCB
6
-pin
36
-pin
Power
supply
PCB
Centronics
interface
*1
On
the
main
PCB
's
the
registration
sensor.
*2
On
the
cover
sensor
PCB
is
the
cover
sensor.
*3
On
the
hook
switch
PCB
is
the
hook
switch
sensor.
*4
On
the
document
sensor
PCB
are
these
sensors:
•
Document
front
sensor
(PH1)
•
Document
rear
sensor
(PH2)
*5
On
the
sensor
FPC
is
the
carrier
home
position
sensor.
*6
On
the
ink
empty
sensor
PCB
is
the
ink
empty
sensor.
Configuration
of
Facsimile
Equipment
III
-
13