Casio VL-Tone fried?

Gnome · August 24, 2009, 06:24:49 PM

Hey I just bought a Casio VL-Tone and came home to try it out...forgetting to buy batteries. I then used an ac adapter which was too powerful for the casio, I heard a hummmmm then a pop then I seen smoke.

Is my Casio done for?
Will it work with batteries? Thanks

Circuitbenders · August 26, 2009, 02:44:09 PM

Check for burnt componentss near the power input on the board. I'd be willing to bet you'll find a blown diode somewhere around that area.

Gnome · August 26, 2009, 03:58:38 PM

Yeah will do. The damn things hard to open! thanks for the advice.

Gnome · August 26, 2009, 04:08:32 PM

Hmmmm a furry inside but no burns. Also a dropped off diode can't see where its from but.

Dylan · August 26, 2009, 04:20:27 PM

The diode is detatched? Well there's your problem. I'm guessing it's somewhere near the power supply. Maybe this will help you find it http://weltenschule.de/TableHooters/picts/Casio_VL-1_pcb.jpeg

Gnome · August 26, 2009, 05:00:33 PM

Ah ha. Turns out the lid of one of my Rubycon capacitors has came off. It appears rubycon do capaciotors for sound quality, which will explain my lack of sound. Thanks for all the help.

Circuitbenders · August 26, 2009, 07:38:48 PM

If you have a diode thats dropped off you may want to find out where it came from. I'm guessing it might be a polarity protection diode thats stops the machine being fried if you use a power supply with the wrong polarity, which might have been your problem in the first place.

Gnome · August 26, 2009, 09:31:32 PM

Yeah the diodes sorted. Just the broken capacitor that needs fixed, I'm assuming thats why I have no sound but have a display, unless i jiggle the two prongs inside the capacitor around which makes the display dissapear and do all sorts of crazy stuff.