OBERHEIM SYNTH group photo

Yahoo Groups archive

OBERHEIM SYNTH

Index last updated: 2026-04-28 23:39 UTC

Message

Re: Oberheim Matrix 6, Dead?

2012-08-05 by wesleyknick

Assuming you were to replace the diodes on the power supply, is there a suitable substitute?  I'm having some trouble identifying the 2 different diode types visually.  6 of the diodes on the power supply are marked with what appears to be a 'T85' followed in smaller font by a '5D' or '5C'.  The two separate spherical diode types are marked with what appears to be a 'T3B5H'.  A Google search of any combination of the markings brings up very little in the way of any reference to diodes.  None of the manuals uploaded on various websites have any additional information and the only place the diodes are depicted is the block diagram.  Anybody have a parts list out there they can upload?  Most of the Korg and Roland service manuals have a parts list...

--- In oberheim@yahoogroups.com, jim finch <jahg88@...> wrote:
>
> You didn't mention how you were reading the powersupply voltages-but I didn't read the whole thread.If you use a O-scope you can see what is actually there,not just the D.C component. Most likely there is garbage riding on the +5V rail making the digital components see it as logic level shifts.
>

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.