Re: 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
>
>
> ---------------------------------------------------------------------------
>
> ** Unsubscribe, subscribe, or view the archives at
> http://www.vectorlist.org
> ** Please direct other questions, comments, or problems to
> chris@westnet.com
>

-- 
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"
---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com