The Icom IC-2725E service manual provides detailed instructions for the setup, operation, and troubleshooting of the dual-band FM transceiver, including specifications, disassembly instructions, circuit descriptions, and parts lists. It emphasizes safety precautions, such as avoiding exposure to liquids and ensuring correct power supply connections, to prevent damage to the transceiver.
Overview
The IC-2725E is a dual-band FM transceiver manufactured by Icom Inc. The service manual provides detailed service information for this model, including specifications, disassembly instructions, circuit descriptions, parts lists, and board layouts. The manual also includes repair notes and safety warnings, such as not connecting the transceiver to an AC outlet or a DC power supply exceeding 16 V, and avoiding exposure to liquids. The transceiver supports FM and AM modes, with a frequency range of 144.000–146.000 MHz and 430.000–440.000 MHz for the European version. It features a double-conversion superheterodyne receiver system, selectable output power levels, and various circuit components for signal processing.
Specifications
- Frequency range: EUR 144.000—146.000, 430.000—440.000; ITR 144.000—146.000, 430.000—434.000, 435.000—438.000
- Mode: FM, AM (AM range is 118.0 — 135.995 MHz and Rx only for USA and EXP)
- Number of memory channels: 212 (including 2 call channels and 10 scan edges)
- Usable temperature range: -10°C to +60°C; +14°F to +140°F
- Frequency resolution: 5, 10, 12.5, 15, 20, 25, 30 and 50 kHz
- Frequency stability: +10 ppm (-10°C to +60°C; +14°F to +140°F)
- Power supply requirement: 13.8 V DC +15 % (negative ground)
- Current drain (at 13.8 V DC): Receive Standby (squelched) 1.2A; Max. audio output 1.8A; Transmit at VHF 50 W/UHF 35 W 12.0 A/11.0A
- Antenna connector: SO-239 (50 Q)
- DATA connector: Mini DIN 6 pin
- Dimensions: Controller 140(W)x50(H)x27(D) mm; Main unit 140(W)x40(H)x187(D) mm
- Weight: Controller 150g; Main unit 1.4 kg
- TRANSMITTER
- Output power: VHF 50 W/25 W/5 W (selectable); UHF 35 W/25 W/5 W (selectable)
- Modulation system: Variable reactance frequency
- Maximum frequency deviation: +5.0 kHz
- Spurious emissions: Less than —60 dB
- Microphone connector: 8-pin modular jack (600 Q)
- RECEIVER
- Receive system: Double-conversion superheterodyne
- Intermediate frequency: 1st IF 38.85 MHz/46.05 MHz; 2nd IF 450 kHz/455 kHz
- Sensitivity: Less than 0.18 uV (at 12 dB SINAD)
- Squelch sensitivity: Less than 0.13 pV (at threshold)
- Selectivity (wide/narrow): More than 12 kHz/-6 dB; Less than 30 kHz/ -60 dB
- Spurious and image rejection: More than 60 dB
- Audio output power (at 13.8 V): More than 2.4 W at 10% distortion with an 8 © load
- * External speaker connector: 2-conductor 3.5(d) mm (14")/8 Q
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
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Operation
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Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Service manual (PDF – 3.6 MB)
Icom IC-2725E Service Manual PDF (3.6 MB): Guide for troubleshooting, repairing, and maintaining the IC-2725E radio model.
- Brand: Icom-ic-2725e-service
- Model: MANUAL
- Type: Service manual
- File size: 3.6 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-2725E Service Manual Overview
The Icom IC-2725E is a high-performance dual-band mobile transceiver designed for reliable two-way communication in various professional and amateur radio applications. This service manual provides comprehensive technical information, including circuit diagrams, parts lists, and detailed repair instructions to assist technicians and users in maintaining and servicing the device effectively.
Main Features and Specifications
- Dual-band operation: VHF 144–148 MHz and UHF 430–450 MHz
- High power output up to 50 watts for clear communication
- 128 programmable memory channels with alpha-numeric display
- CTCSS and DCS tone squelch for interference-free operation
- Wide/narrow FM channel spacing selectable
- Built-in noise blanker and automatic noise limiter
- Emergency alert function for safety communications
- Compact and rugged design suitable for mobile environments
Basic Usage and Operation Tips
To operate the IC-2725E, first select the desired frequency band and channel using the front panel controls. Adjust the volume and squelch settings to optimize audio clarity and reduce background noise. Utilize the programmable memory channels to quickly access frequently used frequencies. For emergency situations, activate the emergency alert feature to broadcast your location. Always ensure the antenna is properly connected and positioned for optimal signal reception and transmission.
Troubleshooting and Maintenance Notes
If you experience weak transmission or reception, verify antenna connections and check for any physical damage. Refer to the service manual’s circuit diagrams to diagnose common issues such as power supply faults or audio problems. Regularly clean the device’s exterior and connectors to prevent dust buildup. Avoid exposing the transceiver to extreme temperatures or moisture. For any internal repairs, follow the step-by-step instructions in this manual to ensure safe and accurate servicing.
Safety Reminder
Always disconnect the power source before performing any maintenance or repairs on the IC-2725E. Use only manufacturer-recommended replacement parts to maintain device integrity and safety. Avoid operating the transceiver while driving to prevent distractions. Follow all local regulations regarding radio frequency transmissions to ensure legal and safe usage.