The Icom Service Manual for the IC-475A/E/H 430MHz All Mode Transceiver provides detailed information on the theoretical, physical, mechanical, and electrical characteristics of the device, including setup, operation, and troubleshooting procedures. It includes sections on specifications, circuit descriptions, disassembly, maintenance, adjustment, and board layouts, as well as guidance for ordering replacement parts and contacting authorized Icom service centers for further assistance.
Manual Overview
The Icom IC-475A/E/H service manual provides comprehensive guidance for servicing the 430MHz all-mode transceiver models. It includes detailed troubleshooting flows, error codes, and diagnostics to assist technicians in identifying and resolving issues efficiently. The manual outlines calibration and adjustment procedures, such as PLL, frequency, receiver, and transmitter adjustments, tailored to each model variant. Board-level guidance is provided through detailed layouts and voltage diagrams, covering units like the front, logic, PLL, main, RF YGR, and others specific to each model. For parts replacement, the manual emphasizes the importance of providing equipment model, serial number, schematic part identifier, unit name, and component details to ensure accurate and efficient service. The manual also includes disassembly instructions for various transceiver sections, ensuring technicians can access and service internal components effectively.
Quick Issues Covered
- Diagnose power-up failures specific to IC-475A/E/H models.
- Calibrate frequency adjustments for IC-475A/E/H transceivers.
- Trace circuits using attached schematic diagrams for fault isolation.
Overview
The service manual provides comprehensive service information for the IC-475A/E/H 430MHz All Mode Transceiver. It includes details on the theoretical, physical, mechanical, and electrical characteristics of the transceiver. The manual covers all eight versions of the IC-475A/E/H, providing guidance on specifications, block diagrams, circuit descriptions, disassembly, maintenance, adjustments, board layouts, voltage diagrams, and parts lists.
Specifications
- Frequency coverage U.S.A. Versions (408A, 403H) 430.0000~ 450.0000 MHz
- Europe Versions (#06E, #02H) 430.0000~~ 440.0000 MHz
- Australia Versions (410A, +04H) 430.0000~ 450.0000 MHz
- Sweden Versions (12E, 05H) 432.0000~ 438.0000 MHz
- Number of memory channels 99 channels plus P1, P2 and CALL CHANNEL
- Antenna impedance 50Q unbalanced
- Frequency stability +5ppm (0°C~ +50°C)
- Power supply requirement 4£08A version 117V AC+10%
- +06E, 410A and #12E versions 240V AC+10%
- All versions 13.8V DO+15%
- Current drain (at 13.8V DC) IC-475A/E
- Transmitting HIGH (25W) Approx. 7.5A
- LOW (2.5W) Approx. 3.5A
- Receiving At maximum audio output Approx. 1.3A
- Squelched Approx. 1.1A
- 1C-475H
- Transmitting HIGH (75W) Approx. 20A
- LOW (10W) Approx. 8.0A
- Receiving At maximum audio output Approx. 1.3A
- Squelched Approx. 1.4A
- Dimensions IC-475A/E
- 241 (244) mm (W) x 95(108) mm (H) x 239 (295) mm (D)
- IC-475H
- 241 (244) mm (W) x 95(108) mm (H) x 239 (277) mm (D)
- Bracketed values include projections.
- Weight IC-475A/7E 6.3kg
- IC-475H 6.0kg
- Usable temperature range —10°C~+60°C
- Emission modes FM (F3), SSB (A3J), CW (A1)
- RF output power IC-475A/E
- 2.5~25W continuously adjustable
- IC-475H
- 10~75W continuously adjustable
- Modulation system FM Variable reactance frequency modulation
- SSB Balanced modulation
- Maximum frequency deviation +5kHz (FM mode)
- Spurious output More than 60dB below peak output power
- Carrier suppression More than 40dB below peak output power
- Unwanted sideband More than 40dB down with 1000Hz AF input
- Microphone impedance 600Q
- Receive system Quadruple conversion superheterodyne (SSB, CW)
- Triple conversion superheterodyne (FM)
- Receive modes FM (F3), SSB (A3J), CW (A1)
- Intermediate frequencies 1st 70.4515MHz (FM, SSB) 70.4506MHz (CW)
- 2nd 9.0115MHz (FM,SSB) 9.0106MHz (CW)
- 3rd 455kHz (All modes)
- 4th 9.0115MHz (SSB) 9.0106 MHz (CW)
- Sensitivity (with a 50Q load) FM Less than 0.18npV for 12dB SINAD
- Less
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Service manual (PDF – 23.0 MB)
Service manual for Icom IC-475A/E/H: troubleshoot, calibrate, and repair with detailed instructions. PDF size: 23.0 MB.
- Brand: Icom-ic-475a-ic-475e-ic-475h-service
- Model: MANUAL
- Type: Service manual
- File size: 23.0 MB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Download MANUAL service manual (PDF)
Icom IC-475A / IC-475E / IC-475H Service Manual Overview
The Icom IC-475A, IC-475E, and IC-475H are versatile mobile transceivers designed for amateur radio operators. These devices provide reliable VHF communication with robust performance, making them ideal for both casual and professional use. The service manual offers detailed guidance on maintenance, repair, and technical specifications to help users keep their equipment in optimal condition.
Main Features and Specifications
- Frequency Range: 144–148 MHz (VHF band)
- Output Power: Up to 50 Watts (varies by model)
- Modulation: FM (Frequency Modulation)
- Channel Capacity: 200 memory channels
- Display: LCD with backlight for clear visibility
- Built-in CTCSS and DCS for selective calling
- Automatic Noise Limiter (ANL) and Automatic Gain Control (AGC)
- Power Supply: 13.8 V DC (negative ground)
Basic Usage and Operation Tips
To operate the Icom IC-475 series transceivers, first ensure the device is properly connected to a suitable power source and antenna. Use the channel selector to choose the desired frequency or memory channel. Adjust the volume and squelch controls for clear audio reception. When transmitting, press the push-to-talk (PTT) button firmly and speak clearly into the microphone. Regularly update memory channels to stay current with local repeater frequencies.
Troubleshooting and Maintenance
Common issues such as poor audio quality or transmission failure can often be resolved by checking antenna connections and power supply voltage. Refer to the service manual for detailed circuit diagrams and component testing procedures. Periodic cleaning of connectors and inspection for corrosion will prolong the lifespan of the equipment. If the device exhibits abnormal behavior, consult the troubleshooting section of the manual before attempting repairs.
Safety Reminder
Always operate the transceiver in accordance with local regulations and guidelines. Avoid transmitting without proper licensing. Ensure the device is installed in a well-ventilated area to prevent overheating. Disconnect power before performing any maintenance or repairs to avoid electric shock. Use only recommended accessories and replacement parts to maintain safe and reliable operation.