The signals at pins 4 and 10 should both be nice low or high level digital
signals. They are both logical combinations of P16 and P23, but are different
signals, so only one would be low at a time, to enable either IC18 or 19.
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On Tue, 8/23/16, 7zlwncpbis4x22jwvkd4oc5hzu2njcsjeup42is6@yahoo.com [PolySix] <PolySix@yahoogroups.com> wrote:
Subject: [PolySix] Re: Trying to Restore a P6.
To: PolySix@yahoogroups.com
Date: Tuesday, August 23, 2016, 10:39 PM
After looking at Bob's files, and checking
P20-22, I find that almost everything seems to be in
order.However, P23 is fine until it enters IC23,
but when it exits via pins 4 and 10, I get two differing
waveforms. One looks much like Bob's example of the P23
trace, basically a square wave, but the other is not the
same. I understand that the original P23 wave is
being modulated by the wave coming from P16, but
shouldn't the outputs on 4 and 10 look the
same? I can see the clock clearly at TP4,
and as mentioned above, can see the pattern change on TP2 as
I move front panel controls. Any tips, clues,
or suggestions are
appreciated. Thanks.