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2009-06-03 by djbrow54
Anyone have any service information on this controller? The NiCd leaked real bad on the motherboard. I think there are probably several runs destroyed but it's hard to trace since they are all short runs to vias. I'm assuming I'll have to lift all the affected pins and wire them up off-PCB. I've never seen a NiCd cause so much damage. It's destroyed runs on both the front and back. Schematics, diagnostics, PCB artwork ... anything? Dave
2009-06-03 by Brian Davies
Have you tried Peavey, they are usually very helpful with technical info. Regards Brian G3OYU www.g3oyu.co.uk _____
From: vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of djbrow54 Sent: Wednesday, 03 June 2009 02:00 To: vintagesynthrepair@yahoogroups.com Subject: [vintagesynthrepair] Peavey DPM C8 Anyone have any service information on this controller? The NiCd leaked real bad on the motherboard. I think there are probably several runs destroyed but it's hard to trace since they are all short runs to vias. I'm assuming I'll have to lift all the affected pins and wire them up off-PCB. I've never seen a NiCd cause so much damage. It's destroyed runs on both the front and back. Schematics, diagnostics, PCB artwork ... anything? Dave
2009-06-03 by Wayne Griffin
From: djbrow54
Subject: [vintagesynthrepair] Peavey DPM C8
To: vintagesynthrepair@yahoogroups.com
Date: Tuesday, June 2, 2009, 5:59 PMAnyone have any service information on this controller? The NiCd leaked real bad on the motherboard. I think there are probably several runs destroyed but it's hard to trace since they are all short runs to vias. I'm assuming I'll have to lift all the affected pins and wire them up off-PCB. I've never seen a NiCd cause so much damage. It's destroyed runs on both the front and back.
Schematics, diagnostics, PCB artwork ... anything?
Dave
2009-06-03 by Noel Buhagiar
----- Original Message -----From: djbrow54Sent: Wednesday, June 03, 2009 02:59Subject: [vintagesynthrepair] Peavey DPM C8Anyone have any service information on this controller? The NiCd leaked real bad on the motherboard. I think there are probably several runs destroyed but it's hard to trace since they are all short runs to vias. I'm assuming I'll have to lift all the affected pins and wire them up off-PCB. I've never seen a NiCd cause so much damage. It's destroyed runs on both the front and back.
Schematics, diagnostics, PCB artwork ... anything?
Dave
2009-06-03 by Brian Davies
The other point here is to replace the NiCad with NiMH, and I too have mounted a replacement elsewhere in the cabinet and then hard wired to the PCB Regards Brian G3OYU www.g3oyu.co.uk _____
From: vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of Noel Buhagiar Sent: Wednesday, 03 June 2009 12:32 To: vintagesynthrepair@yahoogroups.com Subject: Re: [vintagesynthrepair] Peavey DPM C8 All that damage if not a 'beyond economical repair' just not to come out with 2 wires from the mother board and put the NiCd battery to the side somewhere in a small safe container. I usually do this when I see the battery mounted on mother board of any synth/keyboard when it a re-chargeable one. Used to put it safe in a 'Kinder Sorpresa' plastic container.. the ones you buy from a candy store! I wish I could have helped but sorry do not have service manual for this. Its worth a try.. good luck eons ----- Original Message ----- From: djbrow54 <mailto:davebr@...> To: vintagesynthrepair@ <mailto:vintagesynthrepair@yahoogroups.com> yahoogroups.com Sent: Wednesday, June 03, 2009 02:59 Subject: [vintagesynthrepair] Peavey DPM C8 Anyone have any service information on this controller? The NiCd leaked real bad on the motherboard. I think there are probably several runs destroyed but it's hard to trace since they are all short runs to vias. I'm assuming I'll have to lift all the affected pins and wire them up off-PCB. I've never seen a NiCd cause so much damage. It's destroyed runs on both the front and back. Schematics, diagnostics, PCB artwork ... anything? Dave
2009-06-03 by Brian Fuller
I had one in storage with the same problem. I got lucky and just cleaned up the leak and the most of the traces were intact. I just took a chance and it turned out great. I also had to replace some switches which Peavey still had at the time. It's the best controller I have ever used, it blows all the others away.YMMV.
From: vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of Wayne Griffin Sent: Wednesday, June 03, 2009 3:17 AM To: vintagesynthrepair@yahoogroups.com Subject: Re: [vintagesynthrepair] Peavey DPM C8 I found mine from the dumpster of a local Catholic school discarded for this very reason. Peavey was no help to me when this happened in 2007. I had wished they might have some NOS motherboards that would just pop in. Anyways, I spent a night under bright light and with some 22 gauge wire and put humpty back together again. I consider this success to have been nothing more than luck- you're right the damage can be extensive. Had some Hi res shots but they were claimed in a HD failure last year. Take your time and give it a try, it's a nice controller. I was just playing my Xpander from it moments ago- brilliant.[w] --- On Tue, 6/2/09, djbrow54 <davebr@...> wrote: From: djbrow54 <davebr@...> Subject: [vintagesynthrepair] Peavey DPM C8 To: vintagesynthrepair@yahoogroups.com Date: Tuesday, June 2, 2009, 5:59 PM Anyone have any service information on this controller? The NiCd leaked real bad on the motherboard. I think there are probably several runs destroyed but it's hard to trace since they are all short runs to vias. I'm assuming I'll have to lift all the affected pins and wire them up off-PCB. I've never seen a NiCd cause so much damage. It's destroyed runs on both the front and back. Schematics, diagnostics, PCB artwork ... anything? Dave
2009-06-07 by djbrow54
Thanks for all the replies. I'm still trying to repair this DPM C8 but seeing all the damage made me pause and examine mine. The battery had also leaked, but no where near as much. All the damage was on the top side of the PCB only. I was really worried about the corrosion continuing to damage the traces so I ended up jumpering all of the traces or vias that had damage. It works! I put some photos on my site at http://modularsynthesis.com/electronic/info.htm#DPM_C8 Now to try this same method on the one I'm trying to repair. There is a lot more damage so I think it will be several evenings of tracing out the runs. Peavey has never answered my email. I think I will try and send an email directly to Hartley. Dave --- In vintagesynthrepair@yahoogroups.com, "djbrow54" <davebr@...> wrote: >Anyone have any service information on this controller?
2009-06-27 by djbrow54
I finally got through to Peavey. They supply the schematics on discontinued products so I have a set. It will certainly help on repairing the second controller. - Dave --- In vintagesynthrepair@yahoogroups.com, "djbrow54" <davebr@...> wrote:
> Thanks for all the replies. ... I ended up jumpering all of the traces or vias that had damage. It works! > > I put some photos on my site at > http://modularsynthesis.com/electronic/info.htm#DPM_C8 > > Peavey has never answered my email. I think I will try and send an email directly to Hartley. > > Dave > > --- In vintagesynthrepair@yahoogroups.com, "djbrow54" <davebr@> wrote: > >Anyone have any service information on this controller?