Update on the 1600S.

The power supply voltage was all good however, I found the RTC battery was dead as yesterdays chicken. The date code suggests it was made in August of 1994 , so I'm not surprised to find it died. The Smart Battery voltage reads good , so I'm gonna leave it alone. I did find ...

Wowbagger, I will do as you suggested on the 120B. It does have a sticker on the back that says "options" with some number that would probably mean something to you. My 1600S had no such data on it.

Thanks again to all

John

Many thanks to all who replied. I'll see if I can scrounge a service manual somewhere so I know which board to look for on the 1600S. I would like to get it working again and it does usb and lsb as well as CW. It was a big help when I built my Elecraft KX-1 CW rig. I really like the color display ...

Just found the forum online and am so glad to see there is some help available for my beloved service monitor's. Today my 1600S failed several self tests and I found the clock and date all jacked up as well as the unit operating time shows about a bazillion hours. I bought this unit from IFR several ...