[ICOM] AH4 help needed.

[D & M Pendergast]

Hello all,

I hope someone can help.  I have an AH4 tuner that has suddenly decided to
stop working.  I have checked all the usual things like control cable and
coax, which all test OK and even substituted another radio but it still
doesn't want to work.

The radio I use with it is an IC-706Mk2G.  Is there anyone out there that
can help with some technical information or even a circuit diagram of the
unit and maybe even a place to start looking for faults.  It seems to be
getting power but the tune sequence fails to start for some reason.

I could send it to Icom for repair but am afraid I won't be able to afford
it.  The unit is not under warranty by the way.

Hope someone can help.

Best 73,

Des - VK3DMP.