Re: Asteroids Deluxe / V2000 problem

That was it - thanks guys. Not sure why I didn't replace then in the first
place - I did pull a couple a while back to replace the transistor mounts as the
leafs were bad on a couple. But everything was "technically" working -- I guess
I figured if one of those was bad, you'd blow F600 or F700 and you'd lose your X
or Y signal altogether. Strange issue indeed.

Now to center the image - crosshatch pattern is off-center, about 2 inches to
the left. I take it that's done with the yoke? No centering adjustments on the
monitor or an Asteroids Deluxe PCB...

________________________________
From: Kevin Moore <talon.k@gmail.com>
To: vectorlist@vectorlist.org
Sent: Sat, November 27, 2010 11:06:30 AM
Subject: Re: VECTOR: Asteroids Deluxe / V2000 problem

I would agree with Andrew, I would suspect Q608, and Q709 or the section that
drives them.

Kevin

On Sat, Nov 27, 2010 at 8:21 AM, Andrew Welburn <andy@andysarcade.net> wrote:

You should take a picture of it in test mode, the crosshatch shows up whats
going on a lot better for me.
>
>Is the game pcb 100% ok? slim chance its an op-amp in the DAC section.
>
> It looks just like one of the monitor chassis transistors failing at the top
>end of its range/spec. You say you've changed the u57/u07 but don't mention
>anything about the 3716/3792? I'd guess you have a marginal chassis transistor
>that may well probably check good when metering out of circuit, but it will
>fail under stress in operating conditions, i have had this before.
> --
>Andrew Welburn
>http://www.andys-arcade.com
>----- Original Message -----
>>From: Scott Zeiser
>>To: vectorlist@vectorlist.org
>>Sent: Saturday, November 27, 2010 2:10 PM
>>Subject: VECTOR: Asteroids Deluxe / V2000 problem
>>
>>
>>Anybody ever seen this before?
>>http://www.youtube.com/watch?v=VH24sa23Er8 (Watch the left side of the
>>screen)
>>
>>Monitor has been recapped, new HV diode, new deflection power transistors
>>(U07/U57s), new big blue, AR-II board and game board have also been capped.
>>Problem has only gotten worse -- video is out of date, now the left 1/4 of
>>the screen is crushed in. Test pattern shows up normally for the most part,
>>it's not as smashed in as the game is, but the left edge sort of pulsates
>>back and forth...
>>
>>Recently picked up a cheap non-working AD board from ebay and repaired it.
>>Backup board exhibits the same behavior, which points back to the monitor.
>>But then recently I've had a friend swap in their deflection board and HV
>>cage with no change.
>>
>>Any ideas?
>>
>>
>>

      
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Received on Mon Nov 29 10:29:06 2010