OBERHEIM SYNTH

Pretty sure the CPU does not read anything back from the display, so
if the display is not working, it should not prevent the synth from working.

Does the synth do anything at all?   

The display uses a higher voltage than the rest of the circuits.   If that's not present,
then the display would not work, but everything else should.   Also, there is a fuse
on the front panel board for the display voltage.  You might want to check that.

Are you saying that you replaced CEM chips as preventive maintenance?
If so, can I have the ones you removed?  :-)

Bob


--------------------------------------------
On Fri, 2/19/16, fknchino@... [oberheim] <oberheim@yahoogroups.com> wrote:

 Subject: [oberheim] Oberheim Matrix 6 Display Issues?
 To: oberheim@yahoogroups.com
 Date: Friday, February 19, 2016, 11:36 AM
 
 
 
 
 
 
 
 
 
 
         
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Hey everybody!
 A while back my Matrix started playing up one day at
 a friends house and kept on turning off randomly.
 One day I took it home and from what I can remember,
 the sounds were completely off and the display was jumbled,
 then shortly after it stopped turning on. 
 
 I performed a diy fixes myself and replaced the caps
 and rails, assuming it could have been a PS problem.
 
 Replaced some buttons, bought and
 replaced some CEM chips, replaced the battery, hell I even
 replaced most caps with 'audiophile' grade nichicon
 caps for fun.
 
 Currently, I've got my Matrix
 6 with a tech right now and he thinks there might be
 something wrong with the display- hence why the matrix
 isn't booting at all.
 The power supply was tested and found
 nothing wrong.
 It's been over a few months and I havn't
 brought it up since, he suggested it could be a tricky job
 trying to identify the root cause.
 Can anyone help with this?
 Would love to see this baby home safe soon.