Vintage Synth Repair

--- In vintagesynthrepair@yahoogroups.com, "Brian Davies" <brian@...> wrote:
>
> Hi
>  
> I've done a search of the Yamaha Service Manual website but the PF15 is not
> listed.  The two nearest are the PF12 and the PF1500.

Are the Manuals a free download? I would check them out if they are.

>  
> Most of this type of Yamaha seem to come apart by removing 4 or 6 screws
> from the bottom panel, 2 or 3 from each end.  The top cover then hinges up
> from the front.  If you simply want to clean a key - that is the plastic
> bits - you need to remove each key from the key-frame assembly.  The method
> varies from model to model, but tends to be a need to lift the back of the
> key and then sliding forward and lifting upward.

I'll try this. 

>  
> If you have a problem with faulty key operation and want to clean the
> contacts this is a different ball game.  You will need to remove the PCB
> underneath the keys, how you do this varies also from model to model.
> Without the service manual you may have a problem working out this is done
> unless you are familiar with all the various systems in use.  Some can be
> done from underneath the key frame, others need you to remove all keys to
> gain access to the contacts.
>  
> Regards
> Brian G3OYU
> www.g3oyu.co.uk