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Icom IC-M506 Service Manual

Icom IC-M506
45 pages
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S-15102XZ-C1
September 2014
VHF MARINE TRANSCEIVER

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Questions and Answers:

Icom IC-M506 Specifications

General IconGeneral
TypeMarine VHF Transceiver
Frequency Range (Receive)156.000 - 163.425 MHz
Waterproof RatingIPX7
DSCYes
Output Power25W
Weight2.2 lbs
DisplayFull Dot Matrix LCD
NMEA ConnectivityNMEA 0183

Summary

Introduction and Important Notes

Cautions and Repair Notes

Key safety precautions and repair guidelines for the transceiver.

Section 2 Inside Views

Logic Unit Internal View

Identification of components on the Logic Unit PC board.

Main Unit Top View

Identification of components on the Main Unit PC board (top).

Main Unit Bottom View

Identification of components on the Main Unit PC board (bottom).

Section 3 Disassembly Instruction

Removing the Logic Unit

Step-by-step guide to remove the Logic Unit.

Removing the Main Unit

Step-by-step guide to remove the Main Unit.

Section 4 Circuit Description

Receive Circuits

Explanation of the transceiver's receive signal path.

RX AF Circuits and Audio Output Paths

Description of AF signal processing and output routes.

Transmit Circuits

Detailed explanation of the transceiver's transmit signal path.

Modulation Circuits

Explanation of how the modulation signal is generated.

Frequency Synthesizer Circuits

Explanation of the frequency generation and control circuits.

AIS Receiver Unit (UX-231)

Description of the Automatic Identification System receiver.

NMEA2000 Data Routing Circuits

Description of data routing for the NMEA2000 network.

Section 7 Board Layouts

Logic Unit Board Layout (Top View)

Visual layout of components on the Logic Unit PC board.

Logic Unit Board Layout (Bottom View)

Visual layout of components on the Logic Unit PC board (bottom).

Main Unit Board Layout (Top View)

Visual layout of components on the Main Unit PC board (top).

Dial Unit Board Layout (Top View)

Visual layout of components on the Dial Unit PC board (top).

Vol/SQL Unit Board Layout (Top View)

Visual layout of components on the Vol/SQL Unit PC board (top).

Connect Unit Board Layout (Top View)

Visual layout of components on the Connect Unit PC board (top).

Dial Unit Board Layout (Bottom View)

Visual layout of components on the Dial Unit PC board (bottom).

Main Unit Board Layout (Bottom View)

Visual layout of components on the Main Unit PC board (bottom).

Section 8 General Wiring

Logic Unit Wiring Diagram

Wiring connections for the Logic Unit.

Main Unit Wiring Diagram

Wiring connections for the Main Unit.

Section 9 Block Diagram

Section 10 Voltage Diagram

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