The Icom service manual provides detailed instructions for setting up, operating, and troubleshooting the IC-F5021, IC-F5022, IC-F5023/H, IC-F5026/H, and IC-F5028H VHF mobile transceivers. It includes sections on specifications, disassembly instructions, circuit descriptions, adjustment procedures, and parts lists to assist with maintenance and repair.
Manual Overview
The Icom Service Manual for VHF Mobile Transceivers models IC-F5021, IC-F5022, IC-F5023/H, IC-F5026/H, and IC-F5028H provides detailed technical guidance for servicing these devices. For troubleshooting, it emphasizes verifying internal issues before disassembly and ensuring the transceiver is disconnected from power. It advises against forcing variable components and highlights the importance of using insulated tuning tools to avoid short circuits. The manual outlines a structured approach to calibration and adjustments, including frequency, transmit, and receive adjustments, with specific sections dedicated to each. For diagnostics, it includes error codes and board-level guidance, detailing the layout of the front and main units. The manual stresses the importance of using appropriate test equipment, such as attenuators and deviation meters, and provides a comprehensive parts list for ordering replacements. Disassembly instructions are precise, with steps for removing covers and panels, and unsoldering specific points. The manual also includes circuit descriptions, voltage diagrams, and block diagrams to aid in troubleshooting and repairs.
Quick Issues Covered
- Diagnose power-up failures due to incorrect power supply connections.
- Calibrate frequency and transmit adjustments for optimal performance.
- Use schematics for circuit tracing and troubleshooting internal issues.
Overview
This service manual provides technical information for the IC-F5021, IC-F5022, IC-F5023/H, IC-F5026/H, and IC-F5028H VHF mobile transceivers.
Specifications
- Frequency coverage 136-174 MHz [USA], [CHN], [EXP] 136-174 MHz
- 146-174 MHz [RUS]
- Type of emission Wide 16KOF3E (25.0 kHz)
- Middle – 14KOF3E (20.0 kHz)
- Narrow 11KOF3E (12.5 kHz) 8K50F3E (12.5 kHz)
- Number of programable channels 128 channels (8 zones)
- Antenna impedance 50 Q (nominal)
- Operating temperature range -30°C to +60°C (-22’F to +140°F) -25°C to +55°C
- Power supply requirement (nominal) 13.6 V DC (Negative ground) 13.2 V DC (Negative ground)
- Current drain RX Stand-by 300 mA
- Max.audio 1200 mA
- at 25 W 7.O0A
- TX
- at 50 W 14.0A
- Dimensions [25 W ver.] 150 (W) x 40 (H) x 117.5 (D) mm; (5 29/82 (W) x 1 9/16 (H) x 4 5/8 (D) in)
- (projections not included) ‘50 W ver] 150 (W) x 40 (H) x 167.5 (D) mm; –
- (5 29/32 (W) x 1 9/16 (H) x 6 19/32 (D) in)
- Weight [25 W ver.] 0.8 kg (1 3/4 Ib) 0.8 kg
- [50 W ver.] 1.1 kg (2 7/16 Ib) –
- Transmit output power [25 W ver.] 25 W (High), 10 W (Low2), 2.5 W (Low1)
- [50 W ver.] | 50 W (High), 25 W (Low2), 5.0 W (Low1) | –
- Modulation Variable reactance frequency modulation
- Max. permissible deviation Wide +5.0 kHz
- Middle ~ | +4.0 kHz
- Narrow +2.5 kHz
- Frequency error +2.5 ppm +1.5 kHz
- Spurious emission 70 GB typ. 0.25 uW (<1 GHz), 1.0 kW (>1 GHz)
- Adjacent channel power Wide 70 dB min.
- Middle – | 70 dB min.
- Narrow 60 dB min.
- Audio frequency response +1 dB to —3 dB of 6 dB/octave (from 500-2500 Hz)
- Audio harmonic distortion 3% typ. (with 1 kHz AF 40% deviation)
- FM hum and noise Wide More than 40 dB (46 GB typ.) –
- (without CCITT filter) Narrow More than 34 dB (40 GB typ.) –
- Residual modulation Wide – More than 45 dB (55 GB typ.)
- (with CCITT filter) Middle – More than 43 dB (53 dB typ.)
- Narrow – More than 40 dB (50 GB typ.)
- Limiting charact of modulation 70—100% of max. deviation
- Microphone impedance 600 Q
- Receive system Double
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
This service manual includes several safety warnings and precautions for the VHF mobile transceivers:
1. Never connect the transceiver to an AC outlet or to a DC power supply that uses more than specified, as this will ruin the transceiver.
2. Do not expose the transceiver to rain, snow, or any liquids.
3. Do not reverse the polarities of the power supply when connecting the transceiver.
4. Do not apply an RF signal of more than 20 dBm (100 mW) to the antenna connector, as this could damage the transceiver’s front-end.
5. Ensure the problem is internal before disassembling the transceiver.
6. Do not open the transceiver until it is disconnected from its power source.
7. Do not force any of the variable components; turn them slowly and smoothly.
8. Do not short any circuits or electronic parts; an insulated tuning tool must be used for all adjustments.
9. Do not keep power on for a long time when the transceiver is defective.
10. Do not transmit power into a Standard Signal Generator or a Sweep Generator.
11. Always connect a 50 dB to 60 dB attenuator between the transceiver and a Deviation Meter or Spectrum Analyzer when using such test equipment.
12. Read the instructions of test equipment thoroughly before connecting it to the transceiver.
Download MANUAL Service manual (PDF – 2.0 MB)
Service manual for Icom IC-F5021/22/23/26/28: troubleshoot, repair, and maintain radio models. File size: 2.0 MB.
- Brand: Icom-ic-f5021-ic-f5022-ic-f5023-ic-f5026-ic-f5028-service
- Model: MANUAL
- Type: Service manual
- File size: 2.0 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-F5021 / IC-F5022 / IC-F5023 / IC-F5026 / IC-F5028 Service Manual Overview
The Icom IC-F5021, IC-F5022, IC-F5023, IC-F5026, and IC-F5028 series are professional-grade handheld two-way radios designed for reliable communication in demanding environments. These models are widely used in industries such as public safety, construction, and event management, providing clear voice transmission and robust performance. This service manual offers detailed guidance on maintenance, repair, and troubleshooting to ensure optimal operation of these radios.
Main Features and Specifications
- Frequency Range: VHF and UHF bands depending on model
- Power Output: Up to 5 Watts for extended communication range
- Channel Capacity: Supports up to 128 programmable channels
- Durability: MIL-STD-810 compliant for shock, vibration, and water resistance
- Battery Life: Long-lasting rechargeable battery with quick charging options
- Display: Backlit LCD for easy readability in low light conditions
- Emergency Features: Built-in emergency alert and lone worker functions
- Audio: High-quality speaker and noise-cancelling microphone
Basic Usage and Operation Tips
To operate the Icom IC-F502x series radios, first ensure the battery is fully charged. Turn on the device using the power knob and select the desired channel with the channel selector. Use the push-to-talk (PTT) button to transmit your message, releasing it to listen. Adjust the volume using the volume control knob. For optimal communication, hold the radio about 2-3 inches from your mouth and speak clearly. Utilize programmable function keys for quick access to frequently used features.
Troubleshooting and Maintenance Notes
If you experience poor audio quality or intermittent transmission, check the antenna connection and battery charge level. Regularly clean the microphone and speaker openings to prevent dust buildup. In case of device malfunction, refer to the diagnostic procedures outlined in this manual before attempting repairs. Always use recommended replacement parts to maintain device integrity. Store the radio in a dry, cool environment when not in use to prolong its lifespan.
Safety Reminder
Always follow safety guidelines when operating the Icom radios. Avoid using the device near explosive materials or in hazardous environments unless it is specifically rated for such use. Do not attempt to disassemble the radio beyond the instructions provided in this manual. Use only manufacturer-approved batteries and accessories to prevent damage or injury. Keep the radio away from extreme temperatures and moisture to ensure safe and reliable operation.