Table Of Contents - Icom Ic-2820H Service Manual

Table of Contents

Product View2
Table Of Contents3
Specifications4
Inside Views5
Top View5
Bottom View5
Disassembly Instructions6
Removing The Top Cover6
Removing The Bottom Cover6
Removing The Main Unit6
Circuit Descriptions7
Receiver Circuits7
Rf Circuits Diagram7
Squelch Circuits8
Af Circuits8
2Nd If And Demodulator Circuits8
Ctcss/Dtcs8
Rf Circuits Description9
1St If Circuits9
Fm Demodulator9
Am Demodulator Circuits9
Transmitter Circuits10
Microphone Amplifier Circuits10
Transmit Power Amplifiers10
Apc Circuits10
Operation Of The Right Band11
Frequency Synthesizer12
Vco Configuration By Frequency12
Pll Circuits13
Left Band Vco Loop13
Right Band Rx Vco Loop13
Right Band Tx-Rx Vco13
Power Supply Circuits14
Cpu Port Allocation15
Adjustment Procedure17
Required Test Equipment17
Jig Cable17
Key Assignment In The Adjustment Mode17
Preparation17
Frequency Adjustment18
Transmit Adjustments19
Connections For Tx Power Adjustment19
Deviation Adjustment20
Connection For Modulation Adjustments20
Receive Adjustments22
Sensitivity Adjustment22
Connection For Receive Sensitivity And Rssi Adjustments22
S-Meter Adjustment24
Squelch Adjustment25
Section 6 Parts List26
Control Unit26
Main Unit27
Mechanical Parts List39
Exploded View40
Board Layouts41
Block Diagram43
Voltage Diagram45
Electrical Parts51