Table Of Contents - Icom IC-720A Instruction Manual

Table of Contents

Table Of Contents3
Specifications4
Features5
Outstanding Receiver Performance5
Pass-Band Tuning And Speech Processor5
Additional Circuits5
Installation6
Unpacking6
Recommendations For Installation6
Power Supply6
Antenna7
Ground7
Microphone7
Cw Key7
Rtty8
External Speaker8
Headphones8
Cooling Fan8
Operating Controls9
Front Panel9
Multi-Function Meter10
Rf Power Control10
Mic Gain Control10
Power Switch10
Dial Lock Button11
Tuning Control Knob11
Mode/Frequency Display11
Dial Lock Indicator11
Controls Under The Access Cover12
Agc (Automatic Gain Control) Switch12
Noise Blanker Switch12
Attenuator Switch12
Rear Panel Connections13
Meter Switch13
Vox Gain Control13
Swr Set Control13
Low Band Antenna Terminal14
Transverter/Scope Terminal14
Acc Socket Connections14
Fuse Holder14
Operating Instructions15
How To Tune15
Frequency Display In Each Mode15
Tuning Knob15
Tuning Speed Button16
Vfo Switch16
Vfo Equalizing Switch17
Simplex/Duplex17
Ham/General Cover Switch17
Band Up/Down Switches17
Rit18
Ssb Operation18
Receiving18
Noise Blanker19
Automatic Gain Control19
How To Use The Vox Circuit20
Cw Operation20
Transmitting20
Sw Side-Tone20
Rtty Operation21
Am Operation22
General Coverage Receiver22
Meter Functions23
Wwv Reception23
Simple Frequency Alignment23
Satellite Communication24
Low Band Antenna24
Receiver Antenna Terminals24
Transverter Connection25
Scope Terminal25
Linear Amplifier Connection26
Band Control Voltage Chart26
Circuit Description27
Swr Unit27
Low-Pass Filter Unit27
Rf Unit27
Main Unit28
Driver Unit28
Pa Unit28
Logic Unit28
Logic Unit Block Diagram29
Pll Unit Block Diagram29
Rtty Unit29
Lda Unit29
Inside Views30
Top View30
Bottom View31
Lpf Unit31
Pll Unit32
Option Installation33
Installation Of Cw Narrow Filter33
Installation Of Am Filter33
Maintenance And Adjustment34
Measuring Instruments Required For Adjustment34
Receiver Adjustment34
Bfo Frequency Adjustment34
P.b.t. Frequency Adjustment35
Receiver If Gain Adjustment35
S-Meter Adjustment35
Transmitter Adjustment36
Idling Current Adjustment36
Alc Adjustment36
Carrier Suppression Adjustment36
Speech Processor Adjustment37
Am Modulation Adjustment37
Ic Meter Adjustment37
Overcurrent Apc Adjustment37
Pll Adjustment38
Tracking Adjustment38
2Nd Lo Adjustment38
Rit Frequency Adjustment38
Trobleshooting39
Block Diagram41
Options42