RE: Sega G-80 PSU - Audio Amp

You would have to add an audio amp to drive the speaker though.

I'm sure these old power supplied just need to be re-capped! They are a pretty hefty linear supply design.

If they didn’t take out the logic boards, chances are good the summing amp in the speech board is bad; I've seen that happen a couple times and it makes it sound like ALL sounds are bad. Should be a TL084 or some such op-amp on the speech board.

Thanks,

Chris Brooks
713-341-9850
-----Original Message-----
From: owner-vectorlist@vectorlist.org [mailto:owner-vectorlist@vectorlist.org] On Behalf Of Pat Danis
Sent: Friday, March 04, 2011 1:24 PM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Sega G-80 PSU - Audio Amp

I recently pulled my storage unit Star Trek out and repaired it and got
it up and running. In the process I went through 3 power supplies. All
of them failed. The one that lasted the longest went for 2 days.
Granted, they hadn't been run in years and probably needed a cleaning,
but in the process of failing, they took out 2 different sound boards.

I checked the voltages before hooking anything up to them and they were
all good. I really am not too thrilled that I now have 2 bad sound
boards. I don't have the smarts to trouble shoot them (sound boards)
but certainly will go through each of the power supplies and rebuild
each of them.

I think the idea of a switcher replacement board is a great idea. I
have seen numerous Sega vector games with switchers hacked into them and
would prefer a cleaner approach. I am looking forward to your results.

Pat
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Received on Fri Mar 4 14:40:42 2011