Search found 230 matches

by Hyde
Thu Oct 13, 2016 4:26 pm
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Re: Ensoniq eps16 + main board issue

No, it's not a floppy issue. And yes, it can be the keyboard. Really the only practical way to narrow down what board it is on the EPS16 is to have a known good (working) one. Then you can swap each board in and see which one fixes it. Then you troubleshoot that bad board. That's the trouble with t...
by Hyde
Thu Oct 13, 2016 1:36 am
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Re: Ensoniq eps16 + main board issue

madtheory wrote:Disconnect SCSI and the extra memory, and see if it boots then.
to be doubly sure, i just pulled the scsi/memory boards, removed the attaching cabling. No change whatsoever.
by Hyde
Wed Oct 12, 2016 9:56 pm
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Re: Ensoniq eps16 + main board issue

If the floppy light is on, wouldn't that indicate that it's attempting to read from it, and possibly not going any further? Are you certain the floppy works? Also, I'm pretty sure the synth won't boot if there is an issue with the keyboard, since it runs through that before the main board. I'm just...
by Hyde
Wed Oct 12, 2016 6:40 am
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Re: Ensoniq eps16 + main board issue

work in progress here. Pulled the ribbon cables to the keyboard & floppy. tested them. both have continuity. bought two chip removal tools & reset all the chips. put it all back together & IT still comes up in "screen self test mode". i pulled the main board & took a closer look. nothing seems odd. ...
by Hyde
Tue Oct 11, 2016 9:17 pm
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Re: Ensoniq eps16 + main board issue

I can't remember if mine was stuck in self test mode (I recall it just displaying things when pressing the instrument buttons), but it wouldn't boot and 2 of my ribbon connectors were shot. I ended up just cutting the ends off, and moving them down the cable. You could check continuity on the ribbo...
by Hyde
Tue Oct 11, 2016 7:47 am
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Re: Ensoniq eps16 + main board issue

Tracking it down is going to be pretty tricky without either luck or experience on your side, but if reseating any socketed chips / ribbon cables, etc. and looking for anything visually wrong (broken traces, etc.) doesn't get you anywhere then pick up a logic probe. They're cheaper than you'd assum...
by Hyde
Mon Oct 10, 2016 5:53 pm
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Re: Ensoniq eps16 + main board issue

As in all vintage Ensoniq boards, clean every removable connector. They have a well-known problem with powdery corrosion. Remanufactured main board MAY be available from http://WWW.TheSoniq.com Not, cheap, but have gotten several mainboards from him and saved another Ensonic. Thanks for the link. W...
by Hyde
Mon Oct 10, 2016 8:04 am
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Re: Ensoniq eps16 + main board issue

In my view there is no easy way to fault find the board, I think a lot comes from experience. From memory the only chips in sockets are the 2 OS EPROMs, the 68000 and the 68k series I/O controller. Look at page 25 of the Service Manual and check page 8 then page 10 those are your starting points. A...
by Hyde
Mon Oct 10, 2016 2:11 am
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Re: Ensoniq eps16 + main board issue

madtheory wrote:Use a chip removal tool, or gain experience with levering out chips with a flathead screwdriver on some device you don't care about.
Any way to test said chips? Or is it a replace & see what happens s scenario?
by Hyde
Sun Oct 09, 2016 9:36 pm
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Re: Ensoniq eps16 + main board issue

"downloaded the service manual" - I bought mine from Syntaur, it does give a lot of useful clues and from memory some test codes. To my frustration it talks of a diagnostic floppy disk which I've never seen, but naturally would like. I've had an EPS16+ main board fail on me, took a while to find th...
by Hyde
Sun Oct 09, 2016 7:18 pm
Forum: HELP!
Topic: Ensoniq eps16 + main board issue
Replies: 25
Views: 9768

Ensoniq eps16 + main board issue

I picked up an eps16+ that is in screen self test mode. I've downloaded the service manual & deducted that it's an issue on the main board. That's where the manual stops. I'm happy to change out the main board but, I can't find one available. So I'm wondering if there are any other diagnostics I can...
by Hyde
Wed Jan 20, 2016 1:50 pm
Forum: General Synthesizers
Topic: Universal Freeware Midi-SysEx Utility
Replies: 19
Views: 5855

Re: Universal Freeware Midi-SysEx Utility

To avoid stating another thread...(Hope you don't mind) I have the same issue but I have a MAC. What are the MAC options ? Thanks 8-)
by Hyde
Tue Jan 19, 2016 10:41 am
Forum: Samplers
Topic: ASR Ensoniq power problems
Replies: 4
Views: 1543

Re: ASR Ensoniq power problems

I agree. Is why I'm asking. I tried to google similar problems & im coming up fairly empty.
by Hyde
Tue Jan 19, 2016 1:57 am
Forum: Samplers
Topic: ASR Ensoniq power problems
Replies: 4
Views: 1543

Re: ASR Ensoniq power problems

I should mention that the fuses have been "visually" checked.
by Hyde
Tue Jan 19, 2016 1:56 am
Forum: Samplers
Topic: ASR Ensoniq power problems
Replies: 4
Views: 1543

ASR Ensoniq power problems

Im looking at an ASR locally & the following description of the problems is what I'm looking at. Anyone have any ideas as to the problem. Trying to guage where I should be, pricewise. Thanks, Hyde The screen never comes on. Power on, and the pair of lights in the center (by the button) flash, someti...