Icom IC-7000 - Service Manual

SERVICE
MANUAL
HF/VHF/UHF ALL MODE TRANSCEIVER
S-14214HZ-C1
Dec. 2005

Icom IC-7000 Specifications

General

Input voltage	13.8 V
Microphone included	Yes
Product type	Portable CB radio
Product color	Black
Housing material	-
Frequency range	0.5 - 455000 MHz
Channels quantity	503 channels

Weight and Dimensions

Depth	180 mm
Width	167 mm
Height	58 mm

Summary

Introduction and Safety Information

Critical Safety Warnings

Highlights dangers related to power supply, liquids, and RF signal levels.

Specifications

Receiver Specifications

Transmitter Specifications

Circuit Description - Receiver Circuits

HF50 MHz RF Circuitry

Details the HF/50 MHz RF filters and signal path from antenna to main unit.

VHF and UHF RF Circuitry

Explains the VHF/UHF RF circuits, filtering, and amplification stages.

Circuit Description - Receiver Signal Path

Preamplifier Circuit Details

Describes the function of the preamplifier circuit for wide band reception.

First Mixer Circuit Operation

Explains how the first mixer converts RF signals to the first IF frequency.

First IF Circuit Function

Details the filtering and amplification of the first IF signal.

Second Mixer and IF Circuits

Describes the mixing and filtering of signals for the second IF frequency.

Circuit Description - Signal Processing

Third Mixer and IF Circuitry

Explains the third mixer's function and the third IF signal processing.

Demodulator and DSP Circuits

Details demodulator circuits for WFM and the DSP circuit functions.

AF Amplifier Circuitry

Describes the AF amplifier stage that drives the speaker.

Circuit Description - Control and Metering

AGC and Squelch Circuitry

Explains Automatic Gain Control and Squelch circuit operations.

Transmitter Input Circuits

Circuit Description - Transmitter Signal Path

Transmitter Mixer and IF Stages

Explains the mixer and IF stages for the transmitter signal path.

RF Circuitry and Amplification

Details the RF circuit's amplification and filtering for signal transmission.

Circuit Description - Power Amplification Control

Drive and Power Amplifier Circuits

Describes the drive and power amplifier circuits for output power.

ALC and APC Circuitry

Explains Automatic Level Control and Automatic Power Control circuits.

Circuit Description - Metering and DDS

RF, ALC, SWR Metering

DDS Circuit Overview

First LO Signal Generation

Explains the generation of the 1st LO signal by the DDS unit.

Circuit Description - DDS and Logic

Second and Third LO Generation

Describes the generation of 2nd and 3rd LO signals by the DDS unit.

Adjustment Procedures - Preparation

Entering Adjustment Mode

Step-by-step instructions on how to enter the adjustment mode.

Operating Modes in Adjustment

Describes how to navigate and operate within the adjustment mode.

Adjustment Procedures - DDS and Display

DDS Adjustment Steps

Detailed steps for performing DDS adjustments.

Display Adjustment Steps

Detailed steps for performing display adjustments.

Transmitter Adjustment - Idling Current

Procedure for adjusting transmitter drive and final idling current.

Adjustment Procedures - Transmitter Tuning

SWR Detector Adjustment

Procedure for adjusting the SWR detector settings.

TX Peak Adjustment

Procedure for adjusting the transmitter peak output.

TX Total Gain Adjustments

Steps for adjusting total transmitter gain across different bands.

Adjustment Procedures - Transmitter Power Output

HF Output Power Adjustment

Procedure for adjusting HF band output power levels.

HF APC Adjustment

Procedure for adjusting the HF Automatic Power Control.

AM Output Power Adjustment

Procedure for adjusting AM mode output power.

50 MHz Output Power Adjustment

Procedure for adjusting 50 MHz band output power levels.

Adjustment Procedures - Transmitter Power Tuning

144 MHz Output Power Adjustment

Procedure for adjusting 144 MHz band output power levels.

VHF APC Adjustment

Procedure for adjusting the VHF Automatic Power Control.

430 MHz Output Power Adjustment

Procedure for adjusting 430 MHz band output power levels.

Adjustment Procedures - Transmitter Controls and Tuning

ALC and Drive Min Adjustments

Procedures for ALC and minimum drive level adjustments.

SWR Adjustment

Steps for adjusting SWR measurement settings.

ID APC and Residual AM Adjustments

Procedures for ID APC and Residual AM adjustments.

Receiver Adjustment - HF50 MHz

RX Peak Adjustment (HF50 MHz)

Procedure for adjusting the receiver's peak response in HF/50 MHz bands.

Total Gain Adjustment (HF50 MHz)

Procedure for setting the total receiver gain in HF/50 MHz bands.

Receiver Adjustment - VHFUHF and WFM

Receive Sensitivity Adjustment (VHFUHF)

Procedure for adjusting receiver sensitivity in VHF/UHF bands.

RX Total Gain Adjustment (VHFUHF)

Procedure for setting total receiver gain in VHF/UHF bands.

WFM Distortion Adjustment

Procedure for adjusting WFM demodulator distortion.

Semi-Conductor Information - Transistors and FETs

Transistor and FET Types

Semi-Conductor Information - Diodes

Diode Types

Wiring Diagram

System Wiring Overview

Block Diagram

System Block Diagram Overview

High-level block diagram showing the functional units and signal flow.

Circuit Diagrams - Display, VR, Connect Units

DisplayVRConnect Unit Circuit Diagrams

Detailed circuit schematics for the display, VR, and connect units.

Circuit Diagrams - Display Unit Details

Display Unit Circuit Diagram

Detailed circuit schematics for the display unit (part 2).

Circuit Diagrams - Main Unit

Main Unit Circuit Diagram

Detailed circuit schematics for the main unit (part 1).

Circuit Diagrams - Main Unit Details

Main Unit Circuit Diagram (Continued)

Circuit Diagrams - Logic Unit

Logic Unit Circuit Diagram

Circuit Diagrams - Logic Unit Details

Logic Unit Circuit Diagram (Continued)

Circuit Diagrams - PADriver Units

PADriver Unit Circuit Diagrams

Circuit Diagrams - PA Unit Details

PA Unit Circuit Diagram

PA Unit Circuit Diagram (Continued)

Circuit Diagrams - DDS Unit

DDS Unit Circuit Diagram

Circuit Diagrams - DDS Unit Details

DDS Unit Circuit Diagram (Continued)