: A popular modification involves replacing the stock micro-USB port with a USB-C control board

: Deep-dive explanations of the PA Unit, RF Unit, and Main Unit logic.

Highly professional and clear; described as "one of the best seen in a long time".

A complete service manual for the IC-705 should contain the following sections:

Since Icom typically restricts these to dealers, you can find digital copies on specialized archive sites: Icom Japan Support : Usually hosts the User Manual , but sometimes lists technical supplements.