Archive of the former Yahoo!Groups mailing list: Discussion about the Korg PolySix synthesizer

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Subject: Problem with a KORG EX-8000

From: "poly_user2002" <st@rinass.de>
Date: 2003-08-06

Hi all,


i know thislist is not for the EX-8000, but i could not find any
forums/user groups about the DW/EX-8000.

The Problem is, that only two Sounds came out while pressing eight
times a Key on the Keyboard.

The Oscillators themself work all correctly. Now, i´ve seen below the
OpAmps 16 Capacitors (yellow/black, 22 Microfarad), which are mostly
connectged to thosecustom-KORG 2260 ADA-Chips . When i make a bridge
on the connectors of one of these Capacitors, i´ll get a sound, but i
can´t change the cutoff-frequency, that means, that the sound which
passes the 2260 coming from the Opamp, is to 100% non-filtered.
Changing those Capacitors has also no effect, the problm is still the
same.

On the 2260 ADAs are all Voltages correct, except with the
difference, that the four capacitors on the right side of the not-
working chips shows no Voltage when pressing a key.

Now is my question: Is there any chip which triggers the 2260 or does
anyone knows that problem?

Greetings + thank you

Stef