Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

 
 
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Chris F.
 
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Default Replacing Unknown Transistor

This may sound like a tough question, but it probably isn't. The unit in
question is an Infiniti SM785 monitor (17", 1996). I acquired this years ago
and obviously attempted a repair, because I left a large TO-3P transistor
(Q604) removed from the circuit, and of course it is long-since lost. Funny
thing is, it's not the horizontal output. Doesn't seem to be a pincushion
amp either, because the monitor will not start without it - a regulator of
some sort maybe?. Anyway, there were several smaller blown transistors
nearby, so I replaced them and then attempted to take a guess on the missing
TO-3P. The only one that allowed the monitor to power and work normally was
an NTE2324, however I only left it on for a few seconds because I didn't
want to risk damaging anything. Does anyone know what the function of that
transistor is, and what would probably make a good sub?

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