Re: [AH] Issues with Oberheim Matrix 6R

From sines
Sent Fri, Dec 14th 2018, 05:50

I just rotated all of the CEM3396s again and now all 6 voices are =
working at regular volume.
But the gibberish still shows up 5 out of 6 reboots. :/ and it=E2=80=99s =
annoying AF


Todd

> On Dec 13, 2018, at 11:56 PM, Tristan <xx@xxxxxxxxx.xxx.xx> wrote:
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> Have you measured the power supply rails? Are they operating within =
spec?
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> /Tristan
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> On Fri, Dec 14th, 2018 at 3:40 PM, sines <xxxxx_xxxx@xxxxx.xx> wrote:
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>> I had a local buyer to take this off my hands, but before I packed it =
up, I
>> checked it out again.=20
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>> My biggest fear manifested:
>> =C3=A2=C2=80=C2=A2 5 out of 6 times after rebooting, I get a =
scrambled gibberish screen
>> =C3=A2=C2=80=C2=A2 super faint audio output of headphones, virtually =
nothing out of main L+R
>> output
>> =C3=A2=C2=80=C2=A2 volume slider is silent at top and bottom of =
fader, only gives sound at
>> middle
>> =C3=A2=C2=80=C2=A2 stuck / legato notes upon startup, and with each =
key press
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>> Thankfully it makes a very quiet sound, but.. it=C3=A2=C2=80=C2=99s =
really quiet.
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>> I did the following:
>> =C3=A2=C2=80=C2=A2 Recapped the 2 10=C3=82=C2=B5F caps on the volume =
slider sub-PCB.
>> =C3=A2=C2=80=C2=A2 Reseated the CEM3396s and reordered them just to =
make sure. No bent pins
>> =C3=A2=C2=80=C2=A2 Reseated legal version of Bob Grieb / Tauntek's OB =
Matrix OS 2.14 EPROM
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>> I am not sure where to go with it next. Help!
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>> Todd
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