The Icom Service Manual for the IC-2SRA/E 144 MHz FM Transceiver provides detailed instructions on setup, operation, and troubleshooting, including specifications, circuit descriptions, adjustment procedures, and parts lists. It emphasizes safety precautions such as avoiding exposure to high voltage and liquids, and includes repair notes to ensure proper handling and maintenance of the transceiver.
Manual Overview
The Icom IC-2SRA/E service manual provides comprehensive guidance for servicing the 144 MHz FM Transceiver. It includes detailed troubleshooting flows, error codes, and diagnostics to identify and resolve issues effectively. The manual emphasizes the importance of ensuring problems are internal before disassembly and advises against connecting the transceiver to power sources exceeding 16 V to prevent damage. Calibration and adjustments are covered, with specific instructions for PLL, receiver, and transmitter adjustments. Technicians are cautioned to use insulated tools and avoid prolonged power application when the device is defective. Board-level guidance is provided through detailed layouts for various units, including the logic, VHF RF, and AF units. The manual also includes a parts list with ordering instructions, emphasizing the need for accurate component identification. Additionally, the manual outlines the necessary precautions when using test equipment, such as connecting attenuators between the transceiver and test devices to avoid damage.
Quick Issues Covered
- Diagnose power-up failures due to incorrect voltage connections.
- Adjust PLL circuits for frequency stability and accuracy.
- Trace circuit schematics for logic unit troubleshooting.
Overview
The service manual provides detailed service information for the IC-2SRA/E 144 MHz FM Transceiver. It includes specifications, circuit descriptions, adjustment procedures, parts lists, mechanical parts and disassembly instructions, board layouts, optional units, voltage diagrams, and block diagrams. The manual is intended to assist with servicing and repairing the transceiver, ensuring it operates within specified parameters and safety guidelines.
Specifications
- Current drain
- External DC power supply: 6~16 V DC (negative ground)
- Usable temperature range: —10°C~+60°C; +14°F~+140°F
- Dimensions and weight
- IC-2SRA (#05): 54 (W) x 170 (H) x 36 (D) mm, 510g, BP-24
- IC-2SRA (#07): 54 (W) x 135 (H) x 36 (D) mm, 395g, BP-82
- IC-2SRE (#02~04): 2.1 (W) x 5.3 (H) x 1.4 (D) in, 13.9 oz
- IC-2SRA (#09): 54 (W) x 154 (H) x 36 (D) mm, 440g, BP-90
- IC-2SRE (#12~14): 94 (W) x 154 (H) x 36 (D) mm, 430g, BP-83
- HAM BAND
- Frequency coverage
- IC-2SRA (#05, #09): 140~150 MHz (Transmit)
- IC-2SRE (#04, #14): 138~174 MHz (Receive)
- IC-2SRE (#02, #03, #12, #13): 144~146 MHz
- IC-2SRA (#07): 144~148 MHz
- Mode: FM
- Frequency stability: ±5 ppm (0°C~ +50°C; +32°F~+122°F)
- Antenna impedance: 50Ω (nominal)
- Transmitter
- Output power (at 13.5 V): 5W, 3.5 W, 1.5 W and 500 mW
- Max. frequency deviation: ±5 kHz
- Spurious emissions: Less than —60 dB
- Receiver
- Receive system: Double-conversion superheterodyne
- Intermediate frequencies: 1st 30.85 MHz, 2nd 455 kHz
- Sensitivity: Less than 0.16 μV for 12 dB SINAD
- Squelch sensitivity: Less than 0.18 μV at threshold
- Selectivity: More than 15 kHz/—6 dB, Less than 30 kHz/—60 dB
- Spurious response rejection: More than 60 dB
- Audio output power: 180 mW at 10% distortion with an 8Ω load
- RECEIVER BAND
- Frequency coverage: 25~950 MHz
- Mode: AM, FM and WFM
- Receive system: Triple-conversion superheterodyne
- Intermediate frequencies: 1st 266.700 MHz, 2nd 10.700 MHz, 3rd 455 kHz
- Sensitivity (Typical): AM 1.8 μV for 10 dB S/N, FM 0.56 μV for 12 dB SINAD, WFM 1.8 μV for 12 dB SINAD
- Selectivity: AM, FM More than 15 kHz/6 dB, WFM More than 150 kHz/6 dB
- Audio output power: 180 mW at 10% distortion with an 8Ω load
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
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Safety & Warnings
NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V as 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 AF signal of more than 20 dBm (100 mW) to the antenna connector as this could damage the transceiver’s front end.
Download MANUAL Service manual (PDF – 22.7 MB)
Icom IC-2SRA/IC-2SRE Service Manual PDF (22.7 MB) aids technicians in troubleshooting and calibrating radio components efficiently.
- Brand: Icom-ic-2sra-ic-2sre-service
- Model: MANUAL
- Type: Service manual
- File size: 22.7 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-2SRA / IC-2SRE Service Manual Overview
The Icom IC-2SRA and IC-2SRE are compact, handheld amateur radio transceivers designed for reliable two-way communication. These models are widely used by amateur radio enthusiasts for local and regional communication, offering clear audio quality and robust performance in a portable form factor. The service manual provides detailed technical information, schematics, and repair instructions to assist technicians and users in maintaining and servicing these radios.
Main Features and Specifications
- Frequency Range: VHF band operation for versatile communication
- Output Power: Adjustable power settings for efficient battery use
- Channel Memory: Multiple programmable channels for quick access
- Compact and Lightweight Design: Easy to carry and operate in the field
- Built-in Squelch Control: Reduces background noise for clearer reception
- Battery Operation: Long-lasting rechargeable battery for extended use
- Durable Construction: Designed to withstand everyday use and outdoor conditions
Basic Usage and Operation Tips
To operate the IC-2SRA/IC-2SRE, first ensure the battery is fully charged. Turn on the radio and select the desired frequency or channel using the tuning knob or keypad. Adjust the volume and squelch controls to optimize audio clarity. Use the push-to-talk (PTT) button to transmit your voice, and release it to listen. Regularly program frequently used channels into memory for faster access during communication.
Troubleshooting and Maintenance Notes
If you experience weak transmission or poor reception, check the antenna connection and battery level first. Replace or recharge batteries as needed. For audio distortion or intermittent operation, inspect the speaker and microphone connections. Refer to the service manual’s schematic diagrams for detailed troubleshooting procedures. Regularly clean the exterior and connectors to prevent dust buildup and corrosion, ensuring optimal performance.
Safety Reminder
Always operate the radio in accordance with local regulations and licensing requirements. Avoid using the transceiver near explosive materials or in hazardous environments. Handle batteries with care to prevent leaks or damage, and dispose of used batteries properly. For repairs, follow the service manual instructions carefully to avoid electrical hazards and ensure safe operation.