Opinions on sh101 erratic behavior

[Jeroen Bruintjes]

It's got to be the power supply. When running on batteries, my SH-101 
flashes its powerLED when the battery voltage is too low. If the 
voltage is around the minimum required voltage, the thing will become 
erratic, with all the symptoms you described. Any lower voltage and 
it won't do a thing. 


> From:          "quinton fulsom" <qfulsom at kdi.com>
> To:            <synth-diy at horus.sara.nl>
> Subject:       Opinions on sh101 erratic behavior
> Date:          Mon, 14 Apr 1997 19:56:35 -0500

> I would like any assist on my diagnosis on an sh-101 I am
> troubleshooting. This thing was banged up bad and I am restoring it,
> cosmetically I have finished but it has a problem I believe to be
> capacitor damage probably from the wrong voltage being applied. 
> When turned on it will not show the power light to be on until about
> 6-10 seconds later, sometimes it comes right on.  Then it will flash
> on and off intermittently.  Then the load, hold etc. leds will light
> randomly.  It should come on with a solid power led and light up the
> hold and then transpose (reversed on power down). Additionally it
> will play a sound but it kinda dies out as if losing power.
>  This is how it performs most of the time but sometimes it performs
>  totally
> normally leaving me to believe that it is not a problem w/ the rom
> as if it were the case it would probably never work correctly.  Are
> my diagnoses correct possibly and has anyway else experienced this? 
> Any help, especially a service manual would be boo coop appreciated
> (is that french?).
> 
> Thanks, quint
> 

---===>> BRUN <<===---