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Topic: help with gs1200
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Andrew Woodcock
Film God
Posts: 7477
From: Manchester Uk
Registered: Aug 2012
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posted August 22, 2014 06:15 PM
Nice post for Kevin that Colin, hopefully it will help with his problem which sounds very similar. I have offered Kevin the opportunity to send his machine to a vintage Audio Electronics expert in the North West, who for sure, will be able to diagnose the problem, and as long as the STK chip is still available, will be able to repair it for him.
Aside from the specialist (now often obsolete) IC Chipsets, I believe all other electronic components are pretty much readily available and this guy seems to work miracles, in all kinds of scenarios, to find now obsolete parts (Or improvise - see obsolete capacitor resolution on high end amps).
For anyone else within touching distance of the North West of England who may also be interested in such similar service for their machines, please refer to PR Audio Website, where if you look under the "other repairs" section and then "Beaulieu", you will see a detailed explanation and photo's of how this guy got my machine fully functional once again.
It took him less than 24hrs BTW to diagnose and repair!
Admittedly, probably quite a simple repair by this mans capabilities, but nevertheless, if you look through his past conquests, you cannot help but be impressed with his knowledge and capability when working on vintage electronic audio problems!
My machine was collected by me in identical cosmetic condition as when I dropped it off with him and now works perfectly fine, as when new.
I have just had a quick look and the Sanyo STK 443 IC as used by the GS1200 is still available on E Bay.
[ August 23, 2014, 03:24 AM: Message edited by: Andrew Woodcock ]
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"C'mon Baggy..Get with the beat"
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Andrew Woodcock
Film God
Posts: 7477
From: Manchester Uk
Registered: Aug 2012
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posted August 23, 2014 05:21 AM
That is the problem Maurice in trying to diagnose these type of problems, in that it can inevitably be one of many different reasons to establish the root cause of what appears at first glance to be the same problem as what someone else reported.
Dry joints often feature in there on these older machines but often that is coupled with a failed component etc. In these instances, it is often impossible for us mere mortals to just second guess a solution in complex faults even with test equipment and it is always a relief to find an expert in this vintage audio field to someone like me. Chances are they can get within an inch of the problem on the board immediately just from past experience alone.
Vintage electronic audio repair is, I feel, fast becoming a very specialized business and I cherish the people around who can still come to our aid.
Bill as we have all said, is superb, but he is reluctant nowadays to take on "stressful" Jobs as he has to watch his health nowadays, therefore it is important to me to find local alternatives for the future in order to carry out these type of repairs long after Bill eventually calls it a day.
I much prefer also to transport my machines myself as based on past experience, projectors, no matter how well packed, do not travel well via courier services generally speaking.
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"C'mon Baggy..Get with the beat"
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