[GreenKeys] Model 33 Q1 transistor replacement

Erik Bruchez erik at bruchez.org
Tue Jul 22 15:09:27 EDT 2025


>
> if you leave the machine plugged in to AC and turn off the LINE/OFF/Local
> switch to OFF, there is still current running thru the large toasty resistor


I noticed that the electronics were on when I had my multimeter plugged and
the switch OFF. You could get a shock trying to remove the SMD card, in
particular. Of course, I would have known this if I had read your page
ahead of time ;)

On Tue, Jul 22, 2025 at 11:00 AM WAYNE <teletypeparts at comcast.net> wrote:

> On a good 33 ASR, if you leave the machine plugged in to AC and turn off
> the LINE/OFF/Local switch to OFF, there is still current running thru the
> large toasty resistor.
>
> Unplug when not in use.
>
> Wayne
>
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