[sdiy] Help needed for a HOHNER Pianet “T”

[David Moylan]

If it's not a particular key then it's something common which is either 
a solder joint, wire, transformer, cap, and don't forget the jack (I 
would start there).  If you suspect the cap you can pull it out and 
retest and replace if need be.  Be careful with the heat on old boards 
so you don't lift any traces.

You can find the simple schematic at clavinet.com, but it won't tell you 
much you don't already know.

Dave

Stavros Gregoriou wrote:
> Hi everyone,
> 
> Anyone familiar with this 5 octaves electromechanical vintage keyboard from 
> HOHNER please?
> 
> It operates without electrical power and with no batteries. It only has a Mono 
> output that needs to be connected to an external preamplifier before going to 
> the amplifier.
> For almost 50 years it has worked with no problems! Lately its output comes and 
> goes.
> 
> The only electronic parts that it contains (which I am not sure at all what they 
> are), other than the electromechanical directly associated with the keyboard 
> keys, is a small PCB populated with a ceramic cap(?) and a transformer(?) 
> similar box, on a pin of which the single insulated copper wire coming from the 
> keys is soldered. The Mono output jack is connected to this PCB.
>  
> I will appreciate your help in solving this problem and getting the “Pianet” 
> back in order!
>  
> Many thanks
>  
> Stavros 
> 
> 
>       
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