JVC-KB600

[Trebor51]

I wonder if anyone here has had experience repairing one of these vintage keyboards. I am at my wits end trying to find the problem. It switches on and the light light up but when a key is pressed the sound is just a high pitch piano key and then it fades rapidly where no sound occurs at all. I have checked the caps but cannot see any that are obvious, replaced a few that I suspected, soldered some joints that were lose but still no luck. I have only basic electronic knowledge after repairing my Casio Celviano piano.
Any help would be appreciated.
Thanks.

 

[happyrat1]

Look around for a service manual if you can find one.

 

[Trebor51]

Look around for a service manual if you can find one.

I found a service manual but it doesn't help me much. I really want some guidance about where to be looking.

 

[mris]

Hi
In the service manual look at the power section.
Check the voltages after the rectifier ( + 15volt and -15 volt is normal for devices of that generation.
A higher voltage (20v tot 30 v is also needed for the power amp.
Check the fuses
I'll try to find the manual to view more.
Good luck
Mris

 

[RedEyeC]

Service manuals... ... I remember 20 years ago choosing a workstation - between Yamaha Motif, Korg Triton, and Roland Fantom. I chose the Roland (Fantom X6 and Xa). The manuals of course were severely limited. After a whole lot of searching I found a Forum website called "Fantomized". The site's Fantom users taught this computer illiterate musician every nook and cranny of the Roland Fantom. I learned 95% of that synth from that Forum website, and 5% from the limited manual. I know it is probably a long shot, but continue your quest in looking for people who have known and played your JVC synth model - best of luck.