Then the price will all of a sudden go up. What I'm scared of is getting it working right in front of him. Year Released: 1999 Keyboard: 88 keys with velocity and aftertouch Polyphony: 64 notes Multitimbral: 16 parts ROM: 16MB Dimensions: 1379.5 mm x 356 mm x 109. To further complicate matters, he's lost the PSU, so I'll have to see about bumming one. Anyone happen to know what the voltage should read on the ribbon jack coming out of the power board, and which pins to measure? I would think that if it's getting juice coming off of the power board, and into the next board, that it will be an expensive fix. And I'll go over all the ribbon connectors. I'll try to meter it after the switch too. I'll check where the PSU plugs in at, and meter it there.

He said he has a couple other people coming to look at it, but if they can't offer more than me, he'd call me back.Īfter talking with a few other folks too, I am going to go back and look a little further. If I knew exactly what the problem was, and that it would be a cheap and easy fix, the most I could pony up right now is $300, but of course I didn't tell him that. (little oddity - there is actually a board named the 'itty-bitty button board.I did offer up to $100, no dice. The backlight ps has 16v unregulated in, +5 volt regulator feeding an inverter for high voltage low current output (couple of hundred volts if I remember, not marked on the schamatic).

I would also check for shorted voltage rails in the power supply - there is +5v backlight supply, +5v fan supply from the J102 area, and lots of voltages from J101 area: +3, +3 sensing, +5, -5, +12, -12, +15, and -15. If fuse holds with one of those plugs removed, might help some in locating. Power supply board J101 and 102 come from the power transformer with 17 and 7 volt AC on 101 and 16 volt AC on 102. Easiest to find things would be power supply board or backlight board - maybe shorted electrolytic capacitor or voltage regulator IC. Discrete components are in the power supply board, the backlight board, and some of the audio boards. Looking at the manual, most all of the synth section and logic section boards are largely large scale ICs. However, there are some manuals floating around on the Internet, probably from one of the Yahoo Kurzweil forums (I don't remember where). If you do have some electronics skills and test equipment: Kurzweil does not release service manuals. If there is nothing visible, it is time to carry it to a good tech. Look carefully at all the inter-board wiring (when Kurzweils are buttoned up, there is wiring that passes between metal parts, and can get squeezed and short out). If the replacement fuse blew, there is something shorted somewhere.

Kurzweil pc2x power supply wiring