Disklavier

Hi,

My power supply has been blowing its 7A fuse with increasing regularity.

Does anyone have a service manual or schematic for this early disklavier?

Any suggestions on what might cause the current draw to go up? 

Here's a picture of my power supply 

Jeff
Sent from my Apple Newton

I’m a technician and I went to all the seminars 20 years ago on this model when it was new and have since forgotten most of what I was taught however, suffice it to say that diagnostics didn’t give me any clues.

It plays a disk until it quits ....  which is usually random but sometimes in the same spot.  The piano keys don’t move but the index keeps running and the “activity indicator” shows it’s still reading the disk.

the media is not scratched
happens with any disk
sometimes plays for almost the entire disk, other times it plays two notes and quits
factory  technician suggested a bad regulator or a bad electrolytic capacitor  .....  which is what it sounds like to me.  Erratic hash being imposed on the DC voltage somewhere.

Any first hand experiences out there?
Any rebuilt or working power supplies for sale out there?

Larry Fisher RPT  503-310-6965  text or call US west coast time zone PST/PDT