Korg Poly800/EX800 Users

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
>