On Fri, Feb 27, 2015 at 01:59:20AM -0800, borislav.wurst@... [korgpolyex] wrote:
It's time to get oldschool, the way we used to fix drifty problems in TVs and VCRs back when we fixed them instead of throwing them out. Get at it with a tin of freezer spray and a hair dryer. Gently heat and cool bits until you find one that seems excessively sensitive to heat.
I'd put a very small wager on you finding that it's either a regulator tranny or a disc ceramic capacitor somewhere in the PSU.
--
Gordonjcp MM0YEQ
> hiCan you measure the filter CV as you power it up? Could it be heat related?
>
> it is the coil for tuning
>
>
> the powersupply is fine! works perfectly on my ex800
>
>
> the voltages are right, -5 and +5v coming directly after turning on.
>
>
> what else wonders me is that it sounds like the filter frequencies is sweeping up with the tune...
>
It's time to get oldschool, the way we used to fix drifty problems in TVs and VCRs back when we fixed them instead of throwing them out. Get at it with a tin of freezer spray and a hair dryer. Gently heat and cool bits until you find one that seems excessively sensitive to heat.
I'd put a very small wager on you finding that it's either a regulator tranny or a disc ceramic capacitor somewhere in the PSU.
--
Gordonjcp MM0YEQ