Nice find..
On Thu, Jan 12, 2012 at 7:03 PM, John Robertson <pinball@telus.net> wrote:
> John Robertson wrote:
>
>> (Posted on newsgroups too)
>>
>> Doing some repairs to this board (Atari California Speed) but need
>> schematics (if possible) to find a problem in the video output section.
>>
>> If you even only have the video out section and can email me a scan it
>> would be appreciated!
>>
>> Thanks!
>>
>> John :-#)#
>>
>>
> Solved my problem, the problem was red worked with no load, but went away
> when connected to monitor. Original problem was the video amp (LT1253) was
> blown along with a 7407 (both surface mount). After replacing both had the
> three colours but no current available on the Red.
>
> The LT1253's colour pinout is Red - #1, Green #7, and Blue #8 - all three
> pass through 33R resistors on their way to the JAMMA connector. The Red 33R
> resistor was just off the #1 pin of the LT1253, whereas the Green and Blue
> were about an inch or so away - closer to the output LC network.
>
> So my end problem was the 33R Red series resistor was blown (about 5K or
> so now) and after replacing Red returned.
>
> John :-#)#
> PS if anyone has the schematic for the Seattle PCB I'd still like it for
> my files...
>
>
> --
> 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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Received on Thu Jan 12 20:15:58 2012
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