Hi Michael,
thanks for the reply, i didnt see this until after i posted my last one...
one thing im not sure about is which settings on the multimeter to use and what the resistance values should be.
pete.
--- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@...> wrote:
>
>
>
> Hi Pete,
>
> the problem is more likely NOT the actual clock circuit itself (found on the
> main board using half of IC36 and half of IC28 and sundry other discreet
> components). For details of that circuit see section "4" on the main circuit
> schematic in the files section.
>
> More likely is that there is a problem with the speed slider pot itself or the
> the connector CN2.
>
> The annoying part of this is that the service manual doesn't include an exact
> schematic diagram of the speed pot wired into the clock circuit.
>
> So you will need to do some tracing yourself. But I would start by checking that
>
> the slider pot runs through a range of resistance first. You will need a
> multimeter for that. If you don't have a multimeter then you will need to find
> someone that does or else go buy one.
>
> And then I would check to see that the three wires going from the main board to
> the display board via CN2 are not broken. Make sure all thee connections have
> continuity.
>
> Mike
>