[sdiy] Polysix Repair - Panel/Ground Electrified!?

[ASSI]

On Thursday, July 20, 2017 4:49:44 AM CEST Ian Michael Ferguson wrote:
> While prodding around I then noticed the panel and all grounds were
> electrified (because they shocked me)! 

When you say you got shocked, what exactly does that mean?  You say you've 
tried different places so I'm guessing that it wasn't a very hard shock that 
made you throw everything away.  But please do no further experiments without 
using an RCD (30mA trip point or less)!  Make sure you are isolated from 
earth, put one hand in your pocket and keep it there.  Then (using your other 
hand), measure the voltage of the chassis against some known-good earth 
potential and then measure it again across some not-too-small resistance 
(~33kOhm) you put between chassis and earth (while the power is 
disconnected!).  Chances are that there is a leaky input filter (look for Y- 
or X-capacitors) or improperly connected electrostatic shield in the 
transformer.  Otherwise you're probably having an isolation fail in the 
transformer (which will most likely trip the RCD when you connect the resistor 
to earth), which you'd need to replace immediately in that case.


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

Wavetables for the Waldorf Blofeld:
http://Synth.Stromeko.net/Downloads.html#BlofeldUserWavetables