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Icom IC-Q7E Service Manual

Icom IC-Q7E
39 pages
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О
ІСОМ
SERVICE
MANUAL
VHF/UHF
FM
TRANSCEIVER
IC-Q7A
IC-Q7E
Icom
Inc.

Questions and Answers:

Icom IC-Q7E Specifications

General IconGeneral
ModulationFM
Power Output5W
Supply voltage7.2 V DC
Battery7.2 V
Receiver Sensitivity0.16 μV (12 dB SINAD)
Channel spacing5 kHz, 10 kHz
ModeFM

Summary

SECTION 1 SPECIFICATIONS

Receiver Sensitivity Specifications

Receiver sensitivity values for various frequency bands and modes.

SECTION 2 INSIDE VIEWS

Logic Unit Internal Layout

Internal components and layout of the Logic Unit board.

RF Unit Internal Layout

Internal components and layout of the RF Unit board.

SECTION 3 DISASSEMBLY INSTRUCTIONS

Rear Panel Disassembly

Steps to remove the rear panel of the transceiver.

Logic Unit Disassembly

Steps to remove the Logic Unit from the transceiver.

RF Unit Disassembly

Steps to remove the RF Unit from the transceiver.

SECTION 4 CIRCUIT DESCRIPTION

Receiver Circuits Description

Details various receiver circuits including antenna switching, duplexer, and mixer stages.

SECTION 4 CIRCUIT DESCRIPTION

Receiver IF and Demodulator Circuits

Describes 1st/2nd IF stages and demodulation for FM, WFM, AM.

AF Amplifier Circuit Description

Details the amplification of audio signals for speaker output.

SECTION 4 CIRCUIT DESCRIPTION

Transmitter Circuits Description

Covers microphone amplification, modulation, and PLL circuits.

PLL Circuits Description

Details the Phase-Locked Loop circuits for frequency stability.

SECTION 4 CIRCUIT DESCRIPTION

VCO and Power Supply Circuits

Explains VCO circuits and voltage supply lines.

SECTION 4 CIRCUIT DESCRIPTION

CPU Port Allocations

Details the function of each CPU port on the Logic Unit.

SECTION 5 ADJUSTMENT PROCEDURES

Adjustment Preparation

Lists required test equipment and data for adjustments.

Entering Adjustment Mode

Steps to enter the transceiver's adjustment mode.

SECTION 5 ADJUSTMENT PROCEDURES

Adjustment Connection Diagram

Illustrates test equipment connections for adjustments.

Cloning Cable Modification

Details modifications for the cloning cable.

SECTION 5 ADJUSTMENT PROCEDURES

PLL Adjustment Procedures

Procedures for adjusting VCO lock voltages and reference frequency.

SECTION 5 ADJUSTMENT PROCEDURES

Receiver Sensitivity Adjustment

Steps to adjust receiver sensitivity for VHF and UHF.

S-Meter Adjustment

Steps to adjust the S-meter reading based on signal input.

SECTION 5 ADJUSTMENT PROCEDURES

FM Deviation Adjustment

Adjusts FM deviation for VHF and UHF transmitter outputs.

Tone Call Deviation Adjustment

Adjusts tone call deviation for VHF and UHF.

CTCSS Deviation Adjustment

Adjusts CTCSS deviation for VHF and UHF.

SECTION 6 PARTS LIST

Logic Unit Parts List

Lists electronic components for the Logic Unit board.

RF Unit Parts List

Lists electronic components for the RF Unit board.

SECTION 7 MECHANICAL PARTS AND DISASSEMBLY

Cabinet Parts and Accessories

Lists chassis parts and accessories for the transceiver.

Logic Unit Mechanical Parts

Lists mechanical parts for the Logic Unit assembly.

RF Unit Mechanical Parts

Lists mechanical parts for the RF Unit assembly.

SECTION 8 SEMI-CONDUCTOR INFORMATION

Transistor and FET Information

Diagrams and symbols for transistors and FETs used in the transceiver.

Diode Information

Diagrams and symbols for diodes used in the transceiver.

SECTION 9 BOARD LAYOUTS

Logic Unit Top View Layout

Top view of the Logic Unit board with component placement.

SECTION 9 BOARD LAYOUTS

Logic Unit Bottom View Layout

Bottom view of the Logic Unit board with component placement.

SECTION 9 BOARD LAYOUTS

RF Unit Top View Layout

Top view of the RF Unit board with component placement.

SECTION 9 BOARD LAYOUTS

RF Unit Bottom View Layout

Bottom view of the RF Unit board with component placement.

SECTION 10 BLOCK DIAGRAM

Block Diagram Overview

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

SECTION 11 VOLTAGE DIAGRAM

Logic Unit Voltage Diagram

Detailed voltage diagram for the Logic Unit.

SECTION 11 VOLTAGE DIAGRAM

RF Unit Voltage Diagram

Detailed voltage diagram for the RF Unit.

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