Consider sending the radio to an if:
The IC-705 is a current-production, software-defined radio (SDR). Many adjustments require and jigs . A service manual alone may not allow full alignment without factory tools.
Before you dive into the IC-705 service manual, it is vital to remember that opening your radio will likely void your manufacturer warranty. Furthermore, the IC-705 contains sensitive CMOS components that can be destroyed by static electricity.
If the manual is not directly available via Icom's consumer site, technicians often use trusted repositories.