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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Old January 20th 05, 03:31 PM
Thomas Abell
 
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Default Zenith Flyback...generic replacement

Does anyone recall anything concerning a shutdown problem after replacing a
Zenith flyback with a generic? I have a SL2784BT using a 9-1268 sweep board
that will shutdown after about 20 seconds. Turning the set back on causes
the cycle to repeat. I used a generic fly from Tritronics. Thanks!



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Old January 21st 05, 10:19 PM
Arnold stewart
 
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Default

I had the same problem with a Hitachi set. After some hours of
searching, it turned out to be a leaky capacitor between the collector
and the emitter of the H.O.Transistor (.39 mfd at 1.6 KV). It caused the
emitter voltage to rise slowly and then turn on the shutdown circuit.

Thomas Abell wrote:
Does anyone recall anything concerning a shutdown problem after replacing a
Zenith flyback with a generic? I have a SL2784BT using a 9-1268 sweep board
that will shutdown after about 20 seconds. Turning the set back on causes
the cycle to repeat. I used a generic fly from Tritronics. Thanks!




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