On 25 Apr 2004 09:17:39 -0700, (AGH) wrote:

When i move loose my sm-20 Icom microphone schematic, can somebody
indicate or send me a copy or scan of this? or tell me where can i
download it?

The wiring pin out is here, if that helps at all:
http://www.mods.dk/view.php?ArticleId=2290

1. microphone output white
2. +8 VDC input red
3. frequency up/down blue
4. no connection
5. PTT yellow
6. GND (PTT ground) black
7. GND (mic ground) shield
8. No connection