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Yaesu Manuals
Transceiver
FT-707
Maintenance service manual
Table Of Contents - Yaesu FT-707 Maintenance Service Manual
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Also See for FT-707
:
Instruction manual
(56 pages)
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Instruction manual
(56 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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Table of Contents
Index
2
General
5
General Description
6
Specifications
7
Semiconductors
8
Accessories
8
Front Panel Controls And Switches
9
Rear Panel Connections
11
Microphone Connections
12
Installation
13
Antenna Considerations
13
Ground Connections
13
Power Requirements
13
Power Cord Connections
14
Base Station Installation
15
Power Supply Fp-707 Circuit Diagram
16
Fp-707 Power Transformer Primary Connections
16
Interconnections
17
Relay Box Frb-707
18
Antenna Tuner Fc-707
19
Operation
20
Initial Check
20
Frequency Determination
20
Receive Operation
20
Ssb Mode
21
Am Mode
21
Cw Mode
21
Technical Notes
22
Ssb/Cw Mode Rx
23
Am Mode Rx
24
Ssb Mode Tx
25
Cw Mode Tx
26
Am Mode Tx
27
Rx Frequency Relationships
28
Crystal Data: Ft-707
28
Tx Control Line Circuit
29
Circuit Description
30
Af Unit (Pb-2095)
35
Marker Generator
35
Transmitter
36
Ssb
36
Cw
36
Alc Circuit
37
Common Circuit
38
Vox Circuit
38
Vfo Unit (Pb-2097)
38
Premix Circuit (Af Unit)
39
Counter Unit (Pb-2086A)
40
Servicing
43
Outer Cover Removal
44
Front Panel Removal (A)
45
Front Panel Removal(B)
46
Rear Panel Removal
47
100W Pa Unit Removal
48
Main Chassis Exploded View
49
Board Layout
50
Soldering And Desoldering Technique On Printed Circuit Boards
52
Insertion Of Parts On Circuit Boards
52
Circuit Trace Repair
53
Cw Filter Installation
55
Fix (Crystal Controlled) Operation
56
Modifications
57
S/N Improvement On 80M Band
57
Modification To Eliminate "Clicking" Noise On Cw
57
Tx Imd Distortion Improvement
58
Marker Modification
59
Premix Modification
59
Receiver Input Circuit Modification
60
Warc Tx Modification
61
Counter Unit
62
Maintenance And Alignment
64
Equipment Required
64
Note Regarding Measurement Levels
65
Vox Adjustment
65
S-Meter Alignment
65
Af Unit Alignment Points
65
Cw Sidetone Level Adjustment
66
Marker Alignment
66
If Unit Alignment Points
66
Carrier Balance Adjustment
67
Cw Carrier Point Alignment
67
Vfo Unit
67
Local Oscillator Circuits
67
Premix Bandpass Filter
68
Rf Unit Alignment Points
68
Antenna Coil/Rf Bandpass Filter Alignment
69
Antenna Coil Adjustment
69
Rf Bandpass Filter Adjustment
69
Rf Bandpass Filter
69
Antenna Trap Coil Alignment
70
Clarifier Alignment
70
Po Meter Setting
70
Lpf Unit
70
Directional Coupler Balance
71
Alc Circuit Alignment
71
Fault Identification And Localization
72
Troubleshooting
73
Fundamental Analysis Of The Trouble
73
Mechanical Defects
73
Electrical Defects
73
Receive Mode
74
Relay Connection Information
79
Parts Layout
80
Voltage Chart
81
Avr Unit Parts Layout (Pb-2099A)
92
Voltage Chart (Dc Volts)
94
Counter Unit Parts Layout
95
Vfo Assembly
97
Vfo Unit (Pb-2097A)
97
Vfo Unit Parts Layout (Pb-2097A)
98
Vfo Unit Exploded View
98
Lpf Unit Parts Layout (Pb-2128)
99
Lpf Unit Mounting Detail
100
100W Pa Unit (Pb-2013)
101
100W Pa Unit Parts Layout
102
100W Pa Unit Assembly
103
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 Assemblies
107
Band Switch Assembly
107
Mode Switch Assembly
107
Potentiometer Assemblies
108
Repair Parts
110
Parts List And Ordering Data
111
Parts Order Example
111
Parts List
112
Power Supply Fp-707
125
Schematic Diagram
126
Ft-707 Connection Diagram
127
Wiring Diagram
128
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