The Icom service manual for the IC-W21A/E Dual Band FM Transceiver provides detailed instructions for setup, operation, and troubleshooting, including specifications, disassembly instructions, circuit descriptions, adjustment procedures, and parts lists. It also includes safety warnings such as avoiding exposure to liquids and ensuring correct power supply connections to prevent damage to the transceiver.
Manual Overview
The Icom IC-W21A/E service manual provides detailed technical guidance for servicing the dual band FM transceiver. It includes troubleshooting flowcharts and error code diagnostics to assist technicians in identifying and resolving issues. Calibration and adjustment procedures are outlined, particularly for PLL, receiver, and transmitter circuits, ensuring optimal performance. The manual emphasizes safety precautions, such as avoiding exposure to liquids and ensuring correct power connections to prevent damage. Board-level guidance is provided, detailing the layout and components of the logic, VHF, and UHF units. Technicians are advised to use insulated tools for adjustments and to follow specific procedures for disassembly and reassembly. The manual also includes a comprehensive parts list with ordering instructions, emphasizing the importance of using correct part numbers and quantities. Voltage and block diagrams are provided for further technical reference, aiding in the precise servicing and repair of the transceiver.
Quick Issues Covered
- Diagnose power-up failures with voltage diagram reference.
- Adjust PLL circuits for frequency stability.
- Utilize schematics for circuit tracing and fault isolation.
Overview
This service manual provides the latest service information for the IC-W21A/E Dual Band FM Transceiver. It includes specifications, disassembly instructions, circuit descriptions, adjustment procedures, parts lists, mechanical parts, and board layouts. The manual also provides safety warnings and guidelines for ordering parts and conducting repairs.
Specifications
- Frequency coverage: VHF 144-148 MHz, UHF 440-850 MHz (USA)
- Mode: F3 (FM)
- Antenna impedance: 50 Ω (unbalanced)
- Usable temperature range: -10 °C to +60 °C
- Frequency stability: ±5 ppm (0 °C to +50 °C)
- External DC power supply: 6-16 V DC (negative ground)
- Current drain (Typical): Transmit High 1.4A, Low 500 mA; Receive Rated audio output 150 mA
- Dimensions: 57 (W) x 125 (H) x 35 (D) mm; 57 (W) x 153 (H) x 35 (D) mm (with BP-132)
- Weight: 390 g (with BP-131); 380 g (with BP-130)
- Sensitivity: Less than 0.16 μV for 12 dB SINAD
- Receive system: Double-conversion superheterodyne
- Intermediate frequencies: VHF 1st 43.100 MHz, 2nd 455 kHz; UHF 1st 35.800 MHz, 2nd 455 kHz
- Selectivity: More than 15 kHz/-6 dB, less than 30 kHz/-60 dB
- Audio output power: More than 0.2 W at 10 % distortion with an 8 Ω load
- Spurious rejection: Less than -60 dB
- Output power (at 13.5 V): 5 W (HIGH), 3.5 W (LOW3), 1.5 W (LOW2), 0.5 W (LOW1), 0.015 W (ELOW)
- Modulation system: Variable reactance frequency modulation
- Max. frequency deviation: ±5 kHz
- Spurious emissions: Less than -60 dB
- Microphone impedance: More than 2 kΩ
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
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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 16 V. This will ruin the transceiver. 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 RF signal of more than 20 dBm (100 mW) to the antenna connector. This could damage the transceiver’s front end.
Download MANUAL Service manual (PDF – 4.1 MB)
Icom IC-W21A/IC-W21E Service Manual PDF: 4.1 MB. Assists technicians in troubleshooting, repairing, and maintaining radio equipment.
- Brand: Icom-ic-w21a-ic-w21e-service
- Model: MANUAL
- Type: Service manual
- File size: 4.1 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-W21A / IC-W21E Service Manual Overview
The Icom IC-W21A and IC-W21E are compact, handheld VHF transceivers designed for reliable two-way communication in various outdoor and professional environments. These radios are widely used by amateur radio enthusiasts, security personnel, and event coordinators for clear and efficient voice communication over short to medium distances.
Main Features and Specifications
- Frequency Range: VHF 144–148 MHz
- Power Output: 5 Watts (High), 1 Watt (Low)
- Channel Capacity: 16 programmable channels
- Battery Type: Rechargeable NiMH battery pack
- Operating Voltage: 7.2 V DC
- Built-in CTCSS and DCS for privacy signaling
- Compact and lightweight design for portability
- Durable construction with water-resistant casing
Basic Usage and Operation Tips
To operate the IC-W21A/E, first ensure the battery is fully charged. Turn on the radio by rotating the volume knob clockwise. Select the desired channel using the channel selector dial. Press the Push-to-Talk (PTT) button to transmit your voice; release it to listen. Use the built-in squelch control to reduce background noise. For extended battery life, switch to low power mode when communicating over shorter distances.
Troubleshooting and Maintenance
If you experience weak or no transmission, check the antenna connection and ensure the battery is adequately charged. Intermittent audio issues may be resolved by cleaning the microphone and speaker grills. Regularly inspect the battery contacts and clean them if corroded. Store the radio in a cool, dry place when not in use to prevent moisture damage. Refer to the service manual for detailed repair procedures and parts replacement instructions.
Safety Reminder
Always operate the Icom IC-W21A/E in accordance with local regulations and licensing requirements. Avoid using the radio near explosive gases or in hazardous environments. Do not attempt to disassemble the unit unless qualified, as improper handling may cause electric shock or damage. Use only manufacturer-approved batteries and accessories to ensure safe operation.