Introduction
This service manual provides detailed information for the Icom IC-718 HF Transceiver. It covers specifications, internal component views, disassembly instructions, circuit descriptions, and adjustment procedures. This document is intended for qualified service personnel.
The IC-718 is a versatile HF transceiver designed for amateur radio communication. This manual assists in understanding its internal workings and performing necessary maintenance or repairs.
Key Features and Specifications
- Model: IC-718
- Type: HF Transceiver
- Frequency Coverage: Receive 0.030-29.999999 MHz, Transmit various HF bands (e.g., 1.8-29.7 MHz)
- Modes: USB, LSB, CW, AM, RTTY (FSK)
- Power Supply: 13.8 V DC (negative ground)
- Output Power: 2-100 W (SSB/CW/RTTY/FM), 2-40 W (AM)
Service Information
The manual details the internal structure, including:
- Specifications
- Inside Views of various units (PA, Filter, Main, PLL)
- Disassembly Instructions for covers and front unit
- Circuit Descriptions covering Receiver, Transmitter, PLL, Logic, and Regulator circuits
- Adjustment Procedures
- Parts Lists
- Block Diagrams and Wiring Diagrams
Important Safety Precautions:
- Never connect to a power supply exceeding 16 V DC.
- Do not expose to rain or liquids.
- Ensure correct polarity of the power supply.
- Avoid applying excessive RF signals to the antenna connector.
- Always disconnect power before disassembling.
- Use insulated tools for adjustments.
Ordering Parts
When ordering replacement parts, please provide the following information:
- 10-digit order numbers
- Component part number and name
- Equipment model name and unit name
- Quantity required
