RE: Asteriods losing voltage

[I sent this to Dean off-list yesterday; some of you more experienced folks
please add/correct as necessary]

Hi Dean,
Try replacing the 7805 regulator on the Regulator/Audio II board, and the
caps on that board that filter the +5. Probably a good idea to replace the
power transistor on the heatsink as well (from memory, I think it's a
2n3055), and the "big blue" cap on the power/transformer assembly as well.
Bob Roberts has all these parts - some of them in a kit specifically for the
R/A II. You might also want to consider disabling the "sense" circuit (I
think Atari used that in Asteroids; I know it's in BZ and Red Baron).
Lewis

-----Original Message-----
From: owner-vectorlist@synthcom.com [mailto:owner-vectorlist@synthcom.com]On
Behalf Of RSDAINC@aol.com
Sent: Wednesday, December 12, 2001 1:00 PM
To: vectorlist@synthcom.com
Subject: Re: VECTOR: Asteriods losing voltage

Ok, the problem is not the card edge guys. Yes, I get +5VDC at the harness
when not connected, and +2.4 on the board when it is, but I have discovered
that the voltage lowers even at the harness when it is plugged on the PCB.
Once it has a load, the voltage drops. So the problem is the PS PCB. Dean
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Received on Wed Dec 12 11:59:37 2001