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> Fixing A Faulty Control Board, External trigger not functioning.
benardobenz
Posted: January 27, 2015 06:26 pm
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Hi,

I have been working with a 13 year old (expensive) camera, and the external trigger has stopped working. A temporary fix has been to remove the timing control board and plug it back in, although this does not work every time. Everything else is functioning properly. When I looked over the control board I did not notice any obvious issues.

Is there a realistic way to diagnose the source of the problem, or can anyone please offer some advice to fix it? My suspicion is the sealed pin connectors (I'm not sure if this is the proper name) on the timing board are not forming a good connection.

I am willing to provide any information needed!
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kellys_eye
Posted: January 27, 2015 07:38 pm
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If you can post pics (via Photobucket or somesuch) we might be able to offer pointers.

Without seeing the parts, I can make a guess that the pins may indeed be dodgy. Sometimes bending the pin(s) very slightly off-centre makes a firmer connection but you run the risk of the pin being folded flat if you over-do this - it's a 'fix' that more experienced people may try but not ideal for amateurs.



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benardobenz
Posted: January 27, 2015 10:26 pm
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Here are some pics with descriptions: http://imgur.com/a/YNic7

I can't get into the controller box to bend the pins easily. Is there a good way to clean these types of pins?

Please let me know if you notice anything :)

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Sch3mat1c
Posted: January 28, 2015 02:53 am
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Uhhhhhhhhh...

Just how *expensive* a "camera" are we talking here?

That board's chock-a-block with 100k ECL... sub-nanosecond stuff...

Is this one of those bastards that takes X-ray photos of bombs going off, or something?! ohmy.gif

Tim


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jlsgp
Posted: January 28, 2015 07:04 am
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It appears to be an intermittent connection problem, likely at the male and female connectors on the two boards. Vibration of the boards is transmitted to the joints, so resulting in solder adhesion failure.

Go over with a good magnifying glass to look at all the pins involved for cracked or suspected dry solder joints at both boards. Solder these joints with fresh solder.

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CWB
Posted: January 28, 2015 01:24 pm
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better yet ...
re-solder all the pins on the connector with a good grade of thin rosin core solder (the kind with lead in it) .
follow up by cleaning off the rosin with a suitable solvent (such as tri-chlor) , old toothbrush and q-tips .


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