Yaesu FT-707 - Service Manual

128 pages

Save Page as PDF

To Next Page

Main Page

Index2
General5
General Description6
Specifications7
Semiconductors8
Accessories8
Front Panel Controls and Switches9
Rear Panel Connections11
Microphone Connections12
Installation13
Antenna Considerations13
Ground Connections13
Power Requirements13
Power Cord Connections14
Base Station Installation15
Power Supply FP-707 Circuit Diagram16
FP-707 Power Transformer Primary Connections16
Interconnections17
Relay Box FRB-70718
Antenna Tuner FC-70719
Operation20
Initial Check20
Frequency Determination20
Receive Operation20
SSB Mode21
AM Mode21
CW Mode21
Technical Notes22
SSB/CW Mode RX23
AM Mode RX24
SSB Mode TX25
CW Mode TX26
AM Mode TX27
RX Frequency Relationships28
Crystal Data: FT-70728
TX Control Line Circuit29
Circuit Description30
AF Unit (PB-2095)35
Marker Generator35
Transmitter36
Ssb36
Cw36
ALC Circuit37
Common Circuit38
VOX Circuit38
VFO Unit (PB-2097)38
Premix Circuit (AF Unit)39
Counter Unit (PB-2086A)40
Servicing43
Outer Cover Removal44
Front Panel Removal (A)45
Front Panel Removal(B)46
Rear Panel Removal47
100W PA Unit Removal48
Main Chassis Exploded View49
Board Layout50
Soldering and Desoldering Technique on Printed Circuit Boards52
Insertion of Parts on Circuit Boards52
Circuit Trace Repair53
CW Filter Installation55
FIX (Crystal Controlled) Operation56
Modifications57
S/N Improvement on 80M Band57
Modification to Eliminate "Clicking" Noise on CW57
TX IMD Distortion Improvement58
Marker Modification59
Premix Modification59
Receiver Input Circuit Modification60
WARC TX Modification61
Counter Unit62
Maintenance and Alignment64
Equipment Required64
Note Regarding Measurement Levels65
Vox Adjustment65
S-Meter Alignment65
AF Unit Alignment Points65
CW Sidetone Level Adjustment66
Marker Alignment66
IF Unit Alignment Points66
Carrier Balance Adjustment67
CW Carrier Point Alignment67
VFO Unit67
Local Oscillator Circuits67
Premix Bandpass Filter68
RF Unit Alignment Points68
Antenna Coil/Rf Bandpass Filter Alignment69
Antenna Coil Adjustment69
RF Bandpass Filter Adjustment69
RF Bandpass Filter69
Antenna Trap Coil Alignment70
Clarifier Alignment70
PO Meter Setting70
LPF Unit70
Directional Coupler Balance71
ALC Circuit Alignment71
Fault Identification and Localization72
Troubleshooting73
Fundamental Analysis of the Trouble73
Mechanical Defects73
Electrical Defects73
Receive Mode74
Relay Connection Information79
Parts Layout80
Voltage Chart81
AVR Unit Parts Layout (PB-2099A)92
Voltage Chart (DC Volts)94
Counter Unit Parts Layout95
VFO Assembly97
VFO Unit (PB-2097A)97
VFO Unit Parts Layout (PB-2097A)98
VFO Unit Exploded View98
LPF Unit Parts Layout (PB-2128)99
LPF Unit Mounting Detail100
100W PA Unit (PB-2013)101
100W PA Unit Parts Layout102
100W PA Unit Assembly103
HPF/FAN Motor Control Unit Parts Layout (PB-2101)104
Level Meter (Indicator) Unit Parts Layout (PB-2100)105
SW Unit Parts Layout (PB-2102)106
VR Unit A/B (PB-2103A)106
Switch Assemblies107
Band Switch Assembly107
Mode Switch Assembly107
Potentiometer Assemblies108
Repair Parts110
Parts List and Ordering Data111
Parts Order Example111
Parts List112
Power Supply FP-707125
Schematic Diagram126
FT-707 Connection Diagram127
Wiring Diagram128

Brand	Yaesu
Model	FT-707
Category	Transceiver
Language	English

Yaesu FT-707 - Service Manual

Table of Contents

Other manuals for Yaesu FT-707

Yaesu FT-707 Specifications

Related product manuals