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ICOM IC-290A/E Transceiver Schematic Diagrams and Technical Reference

Document Overview

This document provides detailed schematic diagrams and board layouts for the ICOM IC-290A/E transceiver. It serves as a technical reference for the internal circuitry and component layout of the device. The diagrams illustrate various functional blocks, including the radio frequency (RF) and intermediate frequency (IF) stages, audio processing, modulation/demodulation circuits, control logic, frequency display, power management, and transmitter/receiver paths. Component identifiers, part numbers, and interconnections are shown throughout the schematics. The document also includes board layouts for different units within the transceiver, such as the main unit, RF unit, PLL logic unit, sensor unit, and power amplifier (PA) unit, aiding in component identification and troubleshooting.

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IC-290A E sch

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