Vintage Synth Repair

Replace the relay at the output pcb.

regards,




> Hello. I just purchased a CZ-1 only to discover that it has a very
annoying
> problem. I was 
> only able to try it out with headphones - which emitted a loud,
intermittent
> crackling sound 
> that diminished in frequency (fewer occurrences of the crackling and
> steadier output) the 
> longer the synth was on. The crackle is accompanied by near loss in
volume
> of both crackle 
> and the intended output signal. I thought at the time that there was
> something wrong with 
> the headphone output or jack, but when I got home, I discovered that the
> exact same thing 
> happens via the line out jack. After playing around with the unit, I
noticed
> that hitting the 
> keys hard often triggers a very loud instance of the crackle
followed by a
> period of non-
> crackly, full-volumed output. Has anyone else had this issue? I can
imagine
> (and I know 
> very very little about electronics) that the sound I am hearing is
more like
> that of a dying 
> capacitor or faulty resistor than of a bad jack (I put some Deoxit
DL-100 in
> the jacks to no 
> avail). If anyone can point me in the right direction of some
components to
> test and possibly 
> a schematic to accompany, I would be very thankful.
> 
> Thanks in advance!
>  
> 
> 
> 
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