The Icom service manual for the IC-F21 and IC-F22 series UHF transceivers provides detailed information on specifications, disassembly instructions, circuit descriptions, and adjustment procedures necessary for setup, operation, and troubleshooting. It includes safety warnings, such as avoiding connections to an AC outlet or a DC power supply exceeding 8.6 V, and emphasizes the importance of using proper tools and techniques during repairs to prevent damage or hazards.
Manual Overview
The Icom service manual for the IC-F21 and IC-F22 series UHF transceivers provides detailed guidance for troubleshooting, diagnostics, and maintenance. It emphasizes the importance of verifying internal issues before disassembly and advises against opening the transceiver while connected to a power source. Calibration and adjustments require careful handling of variable components using insulated tools to avoid circuit shorts. The manual includes a comprehensive list of error codes and diagnostic procedures to identify and resolve issues effectively. It provides board-level guidance, including detailed descriptions of the receiver circuits, antenna switching, and IF and demodulator circuits. The manual outlines the disassembly process, highlighting the removal of the chassis and main unit with specific instructions on unscrewing and unplugging components. It also covers the adjustment procedures necessary for optimal performance, ensuring technicians can maintain and repair the transceivers accurately. Additionally, the manual includes a parts list and ordering information for replacement components, ensuring technicians have access to necessary parts for repairs.
Quick Issues Covered
- Diagnose power-up failures with voltage diagram guidance.
- Calibrate receiver circuits using detailed adjustment procedures.
- Trace circuits with comprehensive schematics and board layouts.
Overview
This service manual provides the latest service information for the IC-F21 and IC-F22 series UHF transceivers. It includes details on specifications, disassembly instructions, circuit descriptions, adjustment procedures, parts lists, and more. The manual also warns against improper connections and handling that could cause damage or hazards.
Specifications
- Frequency coverage 440.000 MHz—470.000 MHz, 462.550 MHz—469.550 MHz, 462.550 MHz—467.725 MHz
- Type of emission 16KOF3E/8K50F3E (at 25 / 12.5 kHz: W/N-type), 8K50F3E (at 12.5 kHz: N-type)
- Number of channels 2 ch. (IC-F21BR / F21S / F22S), 15 ch. (IC-F21GM / F22SR), 16 ch. (IC-F21 / F22)
- Power supply requirement 7.2 V (negative ground)
- Antenna impedance 50 Q normal
- Input impedance (Mic) 2.2 KQ normal
- Output impedance (Audio) 8 Q normal
- Intermediate frequency 1st: 46.350 MHz, 2nd: 450 kHz
- Operating temperature range -30 °C to +60 °C, —25 °C to +55 °C
- High power 1.6 A (4 W) except; 1.2 A (2 W) except; 0.5 A (0.5 W ERP) only
- Low power 0.8 A (1 W)
- Stand-by 70 mA
- Rated audio 250 mA
- Dimensions 54(W) x 128(H) x 37(D) mm; 2148(W) x 5125(H) x 11542(D) inch
- Weight 310 g; 10.1 oz (with BP-209), 300 g; 10.6 oz (with BP-222)
- RF output power (at 7.2 V DC) High: 4.0 W, Low1: 2.0 W, low2: 1.0 W
- Modulation system Variable reactance frequency modulation
- Max. permissible deviation + 5.0 kHz (25 kHz), + 2.5 kHz (12.5 kHz)
- External mic.connector 3-conductor 2.5 mm (2 kQ)
- Frequency error +2.5 ppm +1.5 kHz
- Spurious emissions 73 dBc (typical) 0.25 uW <= 1 GHz, 1.00 uW > 1 GHz
- Adjacent channel power 70 dB (25 kHz), 60 dB (12.5 kHz)
- Audio harmonics distortion 3 % typical at 1 kHz, 40 % deviation 5 % typical at 1 kHz 60 % deviation
- FM Hum and noise 46 dB typ. (25 kHz), 40 dB typ. (12.5 kHz)
- Residual modulation — 45 dB typ. (25 kHz), 43 dB typ. (12.5 kHz)
- Limiting charact of modulator 70 % — 100 % of max. deviation
- Receive system Double-conversion super heterodyne
- Intermediate frequencies 1st: 46.350 MHz, 2nd: 450 kHz
- Sensitivity 0.25 uV (typical) for 12 dB SINAD 0.63 pV EMF (typical) for 20 dB SINAD
- Audio output power (at 7.2 V
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
NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 8.6 V. Such a connection could cause a fire hazard and/or electric shock. DO NOT expose the transceiver to rain, snow or any liquids. DO NOT reverse the polarities of the power supply when connecting the transceiver. DO NOT apply an FF signal of more than 20 dBm (100mW) to the antenna connector. This could damage the transceiver’s front end. DO NOT open the transceiver until the transceiver is disconnected from its power source. DO NOT force any of the variable components. Turn them slowly and smoothly. DO NOT short any circuits or electronic parts. An insulated turning tool MUST be used for all adjustments. DO NOT keep power ON for a long time when the transceiver is defective. DO NOT transmit power into a signal generator or a sweep generator. ALWAYS connect a 40 dB to 50 dB attenuator between the transceiver and a deviation meter or spectrum analyzer when using such test equipment. READ the instructions of test equipment thoroughly before connecting equipment to the transceiver.
Download MANUAL Service manual (PDF – 1.6 MB)
Icom IC-F21/IC-F22 Service Manual PDF (1.6 MB): Guide for troubleshooting, repairing, and maintaining radio communication devices.
- Brand: Icom-ic-f21-ic-f22-service
- Model: MANUAL
- Type: Service manual
- File size: 1.6 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-F21 / IC-F22 Service Manual Overview
The Icom IC-F21 and IC-F22 are rugged, handheld two-way radios designed for reliable communication in demanding environments. Widely used by professionals in industries such as construction, security, and event management, these radios offer clear audio quality and durable construction to ensure consistent performance in the field. This service manual provides detailed instructions for maintenance, repair, and troubleshooting to keep your Icom radios operating at peak efficiency.
Main Features and Specifications
- Frequency Range: VHF (IC-F21) and UHF (IC-F22) bands
- Power Output: Up to 5 Watts for extended communication range
- Channel Capacity: 16 programmable channels
- Battery: Rechargeable Ni-Cd or Ni-MH battery pack
- Durability: Water-resistant and dustproof design (IP54 rating)
- Audio: Built-in speaker and microphone with noise-cancelling capability
- Emergency Features: Emergency alert function and priority scan
- Accessory Support: Compatible with various microphones, earpieces, and battery options
Basic Usage and Operation Tips
To operate the IC-F21 or IC-F22, power on the device using the volume knob and select the desired channel with the channel selector. Press and hold the push-to-talk (PTT) button to transmit your message; release it to listen. For optimal battery life, fully charge the battery before use and avoid exposing the radio to extreme temperatures. Regularly check and clean the antenna connection to maintain clear signal transmission. Utilize the scan function to monitor multiple channels efficiently.
Troubleshooting and Maintenance Notes
If you experience weak audio, intermittent transmission, or no power, first verify the battery charge and antenna condition. Clean the battery contacts and antenna connectors to ensure proper connectivity. For persistent issues, consult the detailed troubleshooting section in the service manual, which covers common faults such as speaker failure, microphone problems, and circuit board diagnostics. Regularly inspect the radio for physical damage and replace worn-out parts promptly to avoid further complications.
Safety Reminder
Always use the Icom IC-F21 and IC-F22 radios according to the manufacturer’s guidelines to prevent injury or equipment damage. Avoid operating the radio near explosive gases or in hazardous environments unless it is specifically rated for such conditions. Do not attempt unauthorized repairs; instead, refer to the service manual or contact authorized service centers. Keep the device dry and avoid prolonged exposure to direct sunlight or moisture to maintain safe operation.