Icom Ic705 Service Manual May 2026

Reverse the disassembly steps. Power on and test on several bands. Confirm the original problem is resolved.

The service manual contains warnings that must be strictly followed. Opening the IC-705 presents specific risks: icom ic705 service manual

Based on service bulletins and owner reports, here’s what to look for: Reverse the disassembly steps

  • Symptom: High RX noise floor on 40m.

  • Symptom: Battery not charging, runs only on external DC. The service manual contains warnings that must be

    • The opening sections provide an overview of the radio’s architecture. The IC-705 is a direct sampling SDR for HF and 6m, while VHF/UHF uses a separate superheterodyne receiver. The block diagram shows how the RF signal flows from the antenna connector through low-pass filters, preamps, attenuators, and into the RF/IF ICs. Understanding this flow is the first step in any hardware-level diagnosis.