Brother International FAX-170 Service Manual - Page 12

Transmission

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CONTENTS 1. OVERVIEW III-1 2. MECHANISMS 2.1 Transmitting Mechanism (Feeding and scanning documents) 2.1.1 Automatic document feeder (ADF) 2.1.2 Scanner 2.2 Receiving Mechanism (Feeding recording paper and printing data) 2.2.1 Anti-curl system (ACS) 2.2.2 Automatic cutter 2.2.3 Recorder 2.3 Power Transmission Mechanism 2.3.1 Structure of the gear train 2.3.2 Description of planetary gear system 2.3.3 Power transmission for four operation modes [ 1 ] Recording mode (Solenoid: OFF, Motor rotation: Forward) [ 2 ] Scanning mode (Solenoid: OFF, Motor rotation: Reverse) [ 3 ] Copying mode (Solenoid: ON-+OFF, Motor rotation: Forward) [ 4 ] Cutter driving mode (Solenoid: ON, Motor rotation: Reverse) 2.3.4 Power transmission route 2.4 Sensors and Actuators III-2 III-2 III-2 III-3 III-4 III-4 III-4 III-4 III-5 III-5 III-7 III-8 III-9 III-10 III-11 III-12 III-14 III-15 3. CONTROL ELECTRONICS 3.1 Configuration 3.2 Main PCB 3.3 NCU PCB 3.4 Control Panel PCB 3.5 Power Supply PCB III-17 III-17 III-18 III-31 III-34 III-35

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CONTENTS
1.
OVERVIEW
III
-1
2.
MECHANISMS
III
-2
2.1
Transmitting
Mechanism
(Feeding
and
scanning
documents)
III
-2
2.1.1
Automatic
document
feeder
(ADF)
III
-2
2.1.2
Scanner
III
-3
2.2
Receiving
Mechanism
(Feeding
recording
paper
and
printing
data)
III
-4
2.2.1
Anti
-curl
system
(ACS)
III
-4
2.2.2
Automatic
cutter
III
-4
2.2.3
Recorder
III
-4
2.3
Power
Transmission
Mechanism
III
-5
2.3.1
Structure
of
the
gear
train
III
-5
2.3.2
Description
of
planetary
gear
system
III
-7
2.3.3
Power
transmission
for
four
operation
modes
III
-8
[
1
]
Recording
mode
(Solenoid:
OFF,
Motor
rotation:
Forward)
III
-9
[
2
]
Scanning
mode
(Solenoid:
OFF,
Motor
rotation:
Reverse)
III
-10
[
3
]
Copying
mode
(Solenoid:
ON
-+OFF,
Motor
rotation:
Forward)
III
-11
[
4
]
Cutter
driving
mode
(Solenoid:
ON,
Motor
rotation:
Reverse)
III
-12
2.3.4
Power
transmission
route
III
-14
2.4
Sensors
and
Actuators
III
-15
3.
CONTROL
ELECTRONICS
III
-17
3.1
Configuration
III
-17
3.2
Main
PCB
III
-18
3.3
NCU
PCB
III
-31
3.4
Control
Panel
PCB
III
-34
3.5
Power
Supply
PCB
III
-35