[ICOM] HM-56 Microphone schematics?

[Gary Fiber]

Chris,

When the HM-56 causes a rig to transmit, generally one of the electrolytic 
caps in the mic has dried up and shorted. I am pretty sure there is one 
connected directly to the PTT line. I don't have a schematic but used to 
have calls on that issue when I worked for Icom.
Hopefully others here have a print and can direct you directly to the 
problem cap.

Gary


>Does anyone have a scanned copy of the HM-56 microphone schematics they 
>could email me? Mine's died, it is exhibiting the keying-rig-to-transmit 
>problem. It's sat unused for a few years, and the battery is dead. I've 
>tried replacing the battery, still doesn't want to work.
>
>73
>Chris
>N3JLY

Gary Fiber K8IZ
GROL PG-19-6691
Washington State Resident