Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!decwrl!dickns.dec.com!macdonald
From: macdonald@dickns.dec.com (Paul MacDonald, CUP/ASG, 223-3439, PKO3-1/W30  16-Oct-1989 0853)
Newsgroups: comp.sys.amiga
Subject: A2300 Circuit Flaw
Message-ID: <8910161256.AA01932@decwrl.dec.com>
Date: 16 Oct 89 12:55:59 GMT
Organization: Digital Equipment Corporation
Lines: 13


I installed an A2300 genlock in my 2000 the other day. However, when I
plugged my RGB cable into it, the sound to my Sony 1311 monitor
disappeared and was replaced with TV audio. After dissecting the RGB cable
and looking at the 2300 circuitry and circuit diagram, I discovered that
Commodore failed to provide +5VDC to pin 23 of the 2300's RGB port.
The 1311 requires +5VDC to drive the audio section when in mode (front 
panel switch). +5VDC is normally supplied on pin 23 of the 2000's RGB port.
I suspect other monitors require a similar voltage.

A couple dabs of solder to add a jumper on the 2300 solved my problem.

-Paul