Search found 5 matches

by Endeavour94
Fri Jun 28, 2019 1:44 am
Forum: HELP!
Topic: Ensoniq VFX-SD stuck in display self-test mode
Replies: 3
Views: 3729

Re: Ensoniq VFX-SD stuck in display self-test mode

Okay, so the DUART was sucking the Vres down and after replacing it things are looking good now - but I'm stuck with the infamous Keyboard Calibration Error. I checked the keyboard connections, and someone had hardwired the connectors together already, but they used real thin of wire and they looked...
by Endeavour94
Wed Jun 12, 2019 8:02 pm
Forum: HELP!
Topic: Ensoniq VFX-SD stuck in display self-test mode
Replies: 3
Views: 3729

Ensoniq VFX-SD stuck in display self-test mode

I've got an Ensoniq VFX-SD that I'm fixing up and I could use some advice. When I got it, it had a dead display board (display would only ever light up from the filament voltage) so I followed the flow chart in the service manual till it said I should replace the entire board, which I did and it is ...
by Endeavour94
Sun Nov 27, 2016 8:13 pm
Forum: HELP!
Topic: AX-80 O.S. hacking co-op?
Replies: 89
Views: 25119

Re: AX-80 O.S. hacking co-op?

Not without an oscilloscope, which I don't have access to. I guess I can always check the individual capacitance of them, and replace if necessary. I checked the voltages of the pins (P1-5, & the ICs) in the power supply and a few of them were off by 1-3V (with no load).
by Endeavour94
Sun Nov 27, 2016 6:46 pm
Forum: HELP!
Topic: AX-80 O.S. hacking co-op?
Replies: 89
Views: 25119

Re: AX-80 O.S. hacking co-op?

Thanks Rasputin. Yeah, $100 ain't bad even with some issues ;) . At first I thought my problem was a voice was out of tune or something, but I think the LFO might be affecting 1 of the voices more than the others. What exactly happens is that over only 1 octave of the keyboard (switches depending on...
by Endeavour94
Sat Nov 26, 2016 7:46 pm
Forum: HELP!
Topic: AX-80 O.S. hacking co-op?
Replies: 89
Views: 25119

Re: AX-80 O.S. hacking co-op?

This is all awesome! I recently acquired an AX80 for super cheap, but obviously it's got a couple issues with it. Do any of y'all have an idea of what to diagnose/replace regarding the voice chips? I *think* one is dead, and possibly the tuning is off on one. Shoot me a DM/reply, thanks!