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Icom IC-M506 - Service Manual

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

Table of Contents

Other manuals for Icom IC-M506

Preview: Instruction Manual
Instruction Manual124 pages
Preview: Specifications
Specifications4 pages

Questions and Answers

  • L
    Laura NicholsAug 17, 2025
    What to do if there is no sound from my Icom Transceiver speaker?
    • K
      Kendra HornAug 17, 2025
      If you experience little or no sound from your Icom Transceiver speaker, there are several possible reasons. First, the squelch level may be set too high; in this case, set the squelch to the threshold point. Second, the volume level could be set too low; adjust the volume to a suitable level. Finally, if the speaker has been exposed to water, try removing the water using the earthquake function.
  • S
    Scott WilliamsAug 19, 2025
    Why is transmitting impossible or high power not selectable on my Icom Transceiver?
    • D
      Daisy GrahamAug 19, 2025
      If transmitting is impossible or high power cannot be selected on your Icom Transceiver, it could be due to a couple of reasons. Some channels may be programmed for low power or receive only due to regulations; try changing channels. Alternatively, the output power might be set to low; push the power button to select high power.
  • M
    Mark WhiteAug 22, 2025
    How to fix Icom Transceiver that does not turn on?
    • B
      Brenda HouseAug 22, 2025
      If your Icom Transceiver does not turn on, check the connection to the transceiver and power supply.
  • A
    Adam WalkerAug 25, 2025
    How to enable beep sounds on Icom IC-M506?
    • H
      hineskennethAug 26, 2025
      If you are not hearing any beep sounds on your Icom Transceiver, the beep tones may be turned off. To resolve this, turn the beep tones on in the configuration menu.
  • F
    Francis JonesAug 27, 2025
    What to do if scan does not start on Icom IC-M506 Transceiver?
    • R
      Rodney WalkerAug 28, 2025
      If the scan function does not start on your Icom Transceiver, it may be because favorite channels are not programmed. To fix this, set the desired channels as favorite channels.
  • L
    Laura KnappAug 30, 2025
    Why distress calls cannot be transmitted on Icom Transceiver?
    • C
      cardenasamandaAug 30, 2025
      If distress calls cannot be transmitted on your Icom Transceiver, the DCS SELF ID code may not be programmed. Program the DCS SELF ID code to resolve this issue.
  • R
    Robert MartinezSep 2, 2025
    Why is there little or no sound coming from my Icom IC-M506 speaker?
    • Q
      qsharpSep 2, 2025
      If you're getting little or no sound from your Icom Transceiver's speaker, the squelch level might be set too high. Try setting the squelch to the threshold point. Also, ensure the volume level isn't too low by adjusting it to a suitable level. If the speaker has been exposed to water, use the AquaQuake function to remove it.
  • D
    dale80Sep 5, 2025
    What to do if transmitting is impossible on Icom Transceiver?
    • W
      whitakertroySep 5, 2025
      If you cannot transmit or select high power on your Icom Transceiver, it might be because some channels are programmed for low power or receive only due to regulations. Try changing channels. Alternatively, the output power might be set to low; push the [HI/LO] button to select high power.
  • D
    Daniel StevensSep 8, 2025
    Why does scan not start on my Icom IC-M506?
    • D
      David CollinsSep 8, 2025
      If the scan does not start on your Icom Transceiver, it could be because fewer than two favorite channels are programmed. Set the desired channels as Favorite channels to resolve this.
  • M
    Marcus DennisSep 12, 2025
    How to turn on beep sounds on Icom IC-M506?
    • A
      anthony48Sep 12, 2025
      If you are not hearing any beep sounds on your Icom Transceiver, the beep tones may be turned OFF. Go to the CONFIGURATION menu and turn the beep tones ON.

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).

Vol;SQL Unit Board Layout (Bottom View)

Connect Unit Board Layout (Bottom View)

NMEA2000 Unit Main Unit Board Layout

NMEA2000 Unit Connect Unit Board Layout

AIS Unit Connect Unit Board Layout

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

Front Unit Block Diagram

Logic Unit Block Diagram

Main Unit Block Diagram

NMEA2000 Unit Block Diagram

AIS Unit Block Diagram

Section 10 Voltage Diagram

Logic Unit Voltage Diagram

Main Unit Voltage Diagram (Part 1)

Main Unit Voltage Diagram (Part 2)

NMEA2000 Main Unit Voltage Diagram

NMEA2000 Connect Unit Voltage Diagram

AIS Main Unit Voltage Diagram

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

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