Crumar Musical Instruments User Group.

Ok thanks for the input Mike, I have given everything a clean up and the keyboard section is definitely doing something as well as the voice selection circuit, but I cant seem to get anything to and from the "do sol re la mi si fa" board which I presume is the signal generator. I just have a multimeter just now so maybe will have to get a scope for a shot if I can. 
If anyone else has a schematic or any other input that would be great.

Cheers,

Phin


--- In crumar@yahoogroups.com, "Michael Mehalshick" <mikem245@...> wrote:
>
> Hi Phin I have never worked on a Roadrunner I only experience is with a Crumar accordion tone generator. You should try to get a schematics and you will need a good scope It probably uses chips for output and you need to know the proper pins so you can look and trace the waveforms, good luck.  Mike  
>   ----- Original Message ----- 
>   From: chocolatepistons 
>   To: crumar@yahoogroups.com 
>   Sent: Saturday, July 23, 2011 7:51 AM
>   Subject: [crumar] Roadrunner 2 - help with repair / schematics
> 
> 
>     
>   Hi guys,
> 
>   I just found this old Crumar in the back corner of a charity warehouse amongst a pile of electrical chaos marked 'to be tested or binned'. They couldn't test it, but the look of it made me nostalgic so I gave them a tenner for it anyhow.
> 
>   Now I don't have much experience with old synth's etc, but work in car diagnostics and tuning so have a degree of electrical knowledge, maybe not heaps on the circuit level though.
> 
>   It doesn't look too complicated inside and I can gauge an idea of what each board is doing from the wiring but I cant get any sound out of the thing. I've got it powered up and am getting a couple of DC outputs from the transformer circuit thing (around 15v which feeds most of the boards, and 30v which feeds the main bar where the keyboard acts on).
>   I'm not really sure where to go from here though, any pointers? or does anyone know where I can get a service manual or schematics that might help me? bearing in mind I'm on a pretty non existent budget.
> 
>   Thanks in advance for any feedback,
> 
>   Phin
>