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2013-02-21 by fainardi83
hello all i have a korg kr33 that doesn't start i check voltage everything is ok except that there is no +5v i have the schematics of the kr55 but it is not complient with the kr33 does anyone have the schematics of the kr33 ? or does anyone know how can i fix the problem of the +5v regards all
2013-02-21 by Daniel Forró
Hi, let me guess... power supply? If there's no +5 Volt line, then probably not everything is OK :-) It's logical it can't start without that voltage. Begin from there. Measure output voltage, check or change voltage regulator, change electrolytic capacitors for new ones... usual staff. Old linear power supplies are not so complex, and I would suppose there's such one, not switching one. Daniel Forro
On 21 Feb, 2013, at 5:15 PM, fainardi83 wrote: > hello all > i have a korg kr33 that doesn't start > i check voltage everything is ok except that there is no +5v > i have the schematics of the kr55 but it is not complient with the > kr33 > > does anyone have the schematics of the kr33 ? > or does anyone know how can i fix the problem of the +5v > > regards all
2013-02-21 by fainardi83
hi you're right ok let's go for a new capacitor and a new transistor regards --- In vintagesynthrepair@yahoogroups.com, Daniel Forró <dan.for@...> wrote:
> > Hi, > > let me guess... power supply? If there's no +5 Volt line, then > probably not everything is OK :-) It's logical it can't start without > that voltage. > > Begin from there. Measure output voltage, check or change voltage > regulator, change electrolytic capacitors for new ones... usual staff. > Old linear power supplies are not so complex, and I would suppose > there's such one, not switching one. > > Daniel Forro > > > On 21 Feb, 2013, at 5:15 PM, fainardi83 wrote: > > > hello all > > i have a korg kr33 that doesn't start > > i check voltage everything is ok except that there is no +5v > > i have the schematics of the kr55 but it is not complient with the > > kr33 > > > > does anyone have the schematics of the kr33 ? > > or does anyone know how can i fix the problem of the +5v > > > > regards all >