The Icom IC-28A/E/H service manual provides detailed instructions for the setup, operation, and troubleshooting of the FM mobile transceiver across different regional versions, including the U.S.A., Europe, Australia, Spain, and Italy. It includes sections on specifications, circuit descriptions, disassembly and assembly diagrams, maintenance and adjustment procedures, board layouts, voltage/circuit diagrams, and a troubleshooting guide.
Manual Overview
The Icom IC-28A/E/H service manual provides comprehensive guidance for servicing and maintaining these FM mobile transceivers. The manual includes detailed troubleshooting flows to assist technicians in diagnosing and resolving issues efficiently. Error codes and diagnostic procedures are outlined to identify faults within the system. Calibration and adjustment sections cover PLL, transmitter, and receiver adjustments, ensuring optimal performance. Board-level guidance is provided with clear layouts and circuit descriptions for the EF, main, and RX units across different versions. Disassembly and assembly diagrams offer step-by-step instructions for accessing internal components. Voltage and circuit diagrams support in-depth analysis and repair. The manual also includes specifications, parts lists, and optional unit configurations to aid in comprehensive servicing. Technicians are encouraged to contact authorized Icom dealers or service centers for additional support. The manual ensures that technicians can maintain the transceivers’ sophisticated design and functionality across various regional versions.
Quick Issues Covered
- Diagnose power-up failures with IC-28A/E/H models.
- Calibrate transmitter and receiver for optimal performance.
- Trace circuits using detailed schematic diagrams for IC-28 series.
Overview
The ICOM IC-28A/E/H is a versatile FM mobile transceiver known for its sophisticated design, compact size, and ease of operation. It incorporates the latest ICOM engineering techniques and is available in four versions tailored for the U.S.A., Europe, Australia, and Spain/Italy. The service manual provides comprehensive coverage for all versions, detailing specifications, circuit descriptions, disassembly and assembly diagrams, maintenance and adjustment procedures, board layouts, voltage/circuit diagrams, troubleshooting, parts list, optional units, and schematic diagrams.
Specifications
- Frequency coverage: U.S.A. 144.00 ~ 148.00 MHz, Europe 144.00 ~ 146.00 MHz, Australia 144.00 ~ 148.00 MHz, Spain, Italy 144.00 ~ 148.00 MHz
- Frequency resolution: U.S.A., Australia versions 5, 10, 15, 20 or 25kHz, Europe, Italy, Spain versions 12.5 or 25kHz
- Frequency control: CPU based 5kHz (or 6.25kHz) step digital PLL synthesizer
- Memory channels: 21 channels
- Usable temperature range: —10°C ~ +60°C (+14°F ~ +140°F)
- Power supply requirement: 13.8V DC+15% (negative ground)
- Current drain: Transmit (IC-28/E versions) HIGH (25W) Approx. 6.0A, Low Approx. 3.0A, Receive Max audio output Approx. 800mA, Squelched Approx. 450mA, (IC-28H version) Transmit HIGH (45W) Maximum 9.5A, Low Approx. 3.5A, Receive Max audio output Approx. 800mA, Squelched Approx. 450mA
- Antenna impedance: 50 ohms unbalanced
- Dimensions: 140mm(W) x 50mm(H) x 133mm(D) (IC-28A/E versions), 140mm(W) x 50mm(H) x 148.5mm(D) (IC-28H version)
- Weight: 0.95kg (IC-28A/E versions), 1.2kg (IC-28H version)
- Output power: HIGH 25W, Low 5W (IC-28AV/E versions)
- Emission mode: 16KOFSE
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 – 14.3 MB)
Icom IC-28A/IC-28E/IC-28H Service Manual PDF: 14.3 MB. Provides troubleshooting, calibration, and assembly guidance for technicians.
- Brand: Icom-ic-28a-ic-28e-ic-28h-service
- Model: MANUAL
- Type: Service manual
- File size: 14.3 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-28A, IC-28E, IC-28H Service Manual Overview
The Icom IC-28A, IC-28E, and IC-28H are compact, reliable handheld transceivers designed for amateur radio enthusiasts and professionals. These models provide clear communication over VHF frequencies, making them ideal for local communication, emergency services, and outdoor activities. The service manual offers detailed guidance on maintenance, repair, and troubleshooting to ensure optimal performance and longevity of your device.
Main Features and Specifications
- Frequency Range: 144-148 MHz (VHF band)
- Power Output: Up to 5 Watts
- Channel Capacity: 128 memory channels
- Display: LCD with backlight for easy reading
- Battery: Rechargeable NiMH or optional Li-ion battery packs
- Modulation: FM (Frequency Modulation)
- Built-in CTCSS and DCS for privacy and selective calling
- Compact and lightweight design for portability
Basic Usage and Operation Tips
To operate the Icom IC-28 series radios, first ensure the battery is fully charged. Turn on the device using the power switch and select the desired channel using the channel selector knob or keypad. Adjust the volume and squelch controls to minimize background noise. Use the push-to-talk (PTT) button to transmit your voice. For extended communication, familiarize yourself with the memory channel programming and scan functions to quickly access active frequencies.
Troubleshooting and Maintenance Notes
If you experience weak transmission or reception, check the antenna connection and battery status. Regularly clean the device exterior and connectors to prevent dirt buildup. Refer to the service manual for detailed circuit diagrams and component replacement procedures. In case of persistent issues, consult a qualified technician or authorized service center to avoid damage from improper repairs.
Safety Reminder
Always use the Icom IC-28 radios in accordance with local regulations and licensing requirements. Avoid transmitting near sensitive electronic equipment or medical devices to prevent interference. Never operate the radio while driving or in hazardous environments where distraction could cause accidents. Proper handling and maintenance will ensure safe and reliable operation.