Icom HM-98 Schematics, hope this helps!

http://www.mods.dk/downloadmanual.ph...67054634h4.zip

http://www.mods.dk/downloadmanual.ph..._Schematic.pdf

73's

wrote in message
oups.com...
I too am having this mic problem (HM98s) with my IC-2100h radio.
The mic lights up and the red indicator on the mic lights when PTT is
actuated
but the mic does not communicate with the radio. Functions , DTMF ,
PTT,audio, dont work for days at a time then all is well again without
having done anything
to the radio. The radio lives indoors on a power supply, has had very
little
transmitting time. There is no indication on the bar graph output power
level display indicating that PTT has been pressed. I did a CPU reset.
Nothing. I dont think its the mic itself because I tried a mic from
another working radio and still no response. Taking the mic from this
unit and trying it on the other working radio, it works fine. The
function buttons on the radio itself all work fine. The lock is not
engaged on the radio or the mic.

Has anybody resolved this since it was posted in 2002?
Bryan

Mike wrote:
Just recently, my HS-98 microphone has ceased working. If I plug it
in, the
key pad lights up, but nothing works, and everytime a button or PTT
is
pushed, the red light lights up on the mic. Should I send it in and
have it
repaired, or should I spend the $90 to get a new one? Or does
somebody have
fix for my mic. Any help would be graetfully appreciated.
73's
Mike
KC2JGA

--
From the desk of KC2JGA