The Icom service manual for the AT-130, AT-130E, and AT-140 HF Automatic Antenna Tuners provides detailed information on specifications, circuit descriptions, adjustment procedures, and troubleshooting guidelines. It emphasizes the importance of proper setup, such as ensuring the correct power supply and avoiding exposure to liquids, while also offering repair notes to prevent damage during maintenance.
Manual Overview
The Icom AT-130/AT-130E/AT-140 HF Automatic Antenna Tuner service manual provides detailed guidance on troubleshooting, diagnostics, calibration, and board-level adjustments. The manual emphasizes the importance of ensuring a problem is internal before disassembling the tuner and advises against opening the tuner while it is connected to a power source. It is crucial to avoid forcing variable components and to use insulated tuning tools for adjustments to prevent short circuits. The manual includes a troubleshooting flow that involves checking the forward power detector, SWR detector, phase detector, and impedance detector circuits. Each circuit’s function is explained, such as the forward power detector ensuring input power is manageable and the SWR detector providing detection voltage from reflected power. The logic circuit, controlled by the CPU, manages the antenna matching network by processing data from these detectors. Calibration involves setting relays and tuning programs based on input RF power and impedance differences. The manual also includes board layouts and voltage diagrams to assist technicians in performing precise adjustments and repairs.
Quick Issues Covered
- Diagnose power-up failures with voltage diagram in Section 10.
- Error codes for SWR and phase detector circuits in Section 3.
- Schematics and circuit tracing in Section 9, Block Diagram.
Overview
The Icom HF Automatic Antenna Tuner models AT-130, AT-130E, and AT-140 are designed to match the antenna system to a transceiver using various detector circuits. The service manual provides detailed service information, including specifications, circuit descriptions, adjustment procedures, and parts lists. It warns against connecting the tuner to inappropriate power sources and emphasizes careful handling during repairs. The manual covers specifications such as frequency range, input power, and tuning accuracy, as well as the internal components and circuitry involved in the tuner’s operation.
Specifications
- Number of memory channels 745
- Frequency range 1.6 MHz to 30 MHz with a 7 m (23 ft) or longer antenna element
- Maximum input power 150 W PEP, 100 W continuous
- Input impedance 7502
- Minimum operating input power 5 to 15 W
- Automatic tuning time Approx. 2 to 3 sec. (max. 15 sec.), Approx. 1 sec. (Returning to a memorized frequency)
- Tuning accuracy (VSWR) Less than 2.0:1 (after tuning; except for multiples of 1 A)
- Antenna required Marconi-type with suitable RF ground (More than 7 m (23 ft) is suggested)
- Power supply required DC 13.6 V + 15 % (supplied from HF transceiver)
- Current drain Less than 2A
- Usable temperature range -30°C to +60°C; —22°F to +140°F
- Dimensions 230(W) x 80(H) x 340(D) mm, 9342(W) x 3342(H) x 131342(D) in
- Case construction Weatherproof
- Weight (AT-130/AT-140) Approx. 2.5 kg; 5 lb 8 oz, (AT-130E) Approx. 2.7 kg; 6 Ib
- Control cable OPC-420 (For [IC-77/78]), OPC-566 (For [IC-M700PRO], [IC-M710/RT]), OPC-1147 (For [IC-M802]), OPC-1186 (For [IC-F7000])
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 antenna tuner to an AC outlet or to a DC power supply that uses more than 16 V. This will ruin the antenna tuner. DO NOT expose the antenna tuner to rain, snow or any liquids. DO NOT reverse the polarities of the power supply when connecting the antenna tuner. Make sure a problem is internal before disassembling the antenna tuner. DO NOT open the antenna tuner until it 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 tuning tool MUST be used for all adjustments. DO NOT keep power ON for a long time when the antenna tuner is defective. READ the instructions of test equipment thoroughly before connecting equipment to the antenna tuner.
Download MANUAL Service manual (PDF – 1.3 MB)
Icom AT-130/AT-130E/AT-140 Service Manual PDF: Troubleshoot and calibrate efficiently. File size: 1.3 MB.
- Brand: Icom-at-130-at-130e-at-140-service
- Model: MANUAL
- Type: Service manual
- File size: 1.3 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 AT-130 / AT-130E / AT-140 Service Manual Overview
The Icom AT-130, AT-130E, and AT-140 are high-quality automatic antenna tuners designed to optimize the performance of HF radio transceivers. These devices automatically match the impedance between the transceiver and the antenna, ensuring efficient signal transmission and reception across a wide frequency range. Ideal for amateur radio operators and professionals, the tuners enhance communication clarity and reduce signal loss.
Main Features and Specifications
- Frequency Range: 1.8 MHz to 54 MHz covering HF and 6-meter bands
- Automatic tuning with memory for quick frequency changes
- Power Handling: Up to 125 watts (AT-130/AT-130E) and 200 watts (AT-140)
- Compact and rugged design suitable for mobile and base station use
- LED indicators for tuning status and operation feedback
- Built-in antenna impedance matching network
- Compatible with most Icom transceivers and other brands
Basic Usage and Operation Tips
To operate the Icom AT-130 series tuner, connect your transceiver and antenna according to the manual’s wiring diagrams. Power on the tuner and initiate the tuning process by pressing the tuning button or enabling automatic tuning mode on your transceiver if supported. Allow the tuner to complete its cycle; the LED indicator will confirm successful tuning. For best results, perform tuning at the frequency you intend to use. Avoid rapid retuning to prolong component life.
Troubleshooting and Maintenance Notes
If the tuner fails to achieve a proper match, verify all cable connections and ensure the antenna is functioning correctly. Inspect the coaxial cables for damage or corrosion. Periodically clean the tuner’s exterior and connectors with a dry cloth. Internal components should only be serviced by qualified technicians to prevent damage or voiding the warranty. Consult the service manual for detailed diagnostic procedures and parts replacement instructions.
Safety Reminder
Always disconnect power from your transceiver and tuner before performing any maintenance or internal inspection. Avoid operating the tuner at power levels exceeding the specified limits to prevent overheating or damage. Use the equipment in a well-ventilated area and keep it away from moisture and extreme temperatures to ensure safe and reliable operation.