Re: Tempest Restoration Blog

William Boucher wrote:
>
> While none of that could really hurt anything, I have never had to do
> this sort of thing on any Atari vector games and I own several. I
> think you guys are confusing these 6100 monitors/games with Sega GO8
> which is a whole other story.
>
> The worst common supply problem with Atari games that have an AVR
> board is when the either the +5V or ground edge fingers burn due to
> bad edge connector terminals. Once the main positive or negative
> supply paths are compromised, the 10 ohm resistors on the AVR board
> will burn up. It's not the wires that aren't heavy enough, it's the
> terminals inside the connectors that need replacing and the edge
> fingers that need fixing (simple self-adhesive solderable copper tape
> works wonders).
>
> William Boucher
>
Indeed, this is not nearly as needed as for the GO-8s! However when the
card edge connections start to fail this will give the common/ground
shift that can take out the transistors on the monitor...

Consider it preventative maintenance.

John :-#)#
>
> ----- Original Message ----- From: "John Robertson" <pinball@telus.net>
> To: <vectorlist@vectorlist.org>
> Sent: Saturday, September 13, 2008 12:13 PM
> Subject: Re: VECTOR: Tempest Restoration Blog
>
>
>> I think the easiest route is to make a couple of solid common/ground
>> connections - one on the logic board (bolt/solder a wire to the
>> ground plane, a similar one on the regulator, and lastly one on the
>> monitor chassis. These should be tied together with a separate wire -
>> 18 gauge - with the tie point being the power supply. So you will
>> have two wires, one from the power supply to the boards, and the
>> second to the monitor.
>>
>> This should help reduce or eliminate the risk of ground/common
>> potential voltage drift which burns out driver transistors...
>>
>> (Of course installing the LV2000 kit on W.G XYs is HIGHLY recommended
>> - I do that on every Wells Gardner colour XY monitor that comes near
>> our shop!)
>>
>> John :-#)#
>>
>> Colin Davies wrote:
>>>
>>> Thanks - Yes I had that in mind, but not sure how I'll aproach it
>>> yet. I did notice the power wiring from P7 (5v out connector) looks
>>> a little thin indeed.
>>>
>>> I've read this before somewhere, wasn't there an article in one of
>>> the FAQ's (b+w one perhaps) - I'm sure your name was quoted in there.
>>>
>>> A friend has a issue with his starwars, the monitor keep going
>>> wrong... I'm sure its a similar issue.
>>>
>>> Regards, Colin
>>>
>>> ----- Original Message ----- From: "John Robertson" <pinball@telus.net>
>>> To: <vectorlist@vectorlist.org>
>>> Sent: Friday, September 12, 2008 8:34 PM
>>> Subject: Re: VECTOR: Tempest Restoration Blog
>>>
>>>
>>>> Make sure you upgrade the common/ground connections between the
>>>> loig boards, power supply and monitor!
>>>>
>>>> John :-#)#
>>>>
>>>> Colin Davies wrote:
>>>>>
>>>>> Finished the brick rebuild - Repaired, sense modded and tested an
>>>>> ARII (not checked the audio yet) - Got good healthy voltages...
>>>>>
>>>>> Plugged all the looms in and the pcb, but it does not seem to be
>>>>> doing anything at the moment (got a nice healthy 5v) - I'll need
>>>>> to try diagnose the pcb shortly when I can make some space - might
>>>>> be a first use of the fluke 9010a :-) - Not got any bleeps or
>>>>> bloops .. must investigate further... Can't find my scope probes
>>>>> for a start !!
>>>>>
>>>>> Dare not plug in an XY monitor just yet....
>>>>>
>>>>> Cheers, Colin

-- 
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
                 www.flippers.com 
"Old pinballers never die, they just flip out"
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