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Old 04-12-2016, 07:41 PM
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vts1134 vts1134 is offline
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Join Date: Apr 2011
Location: Pittsburgh, PA
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Horizontal Not Running

I have a 621ts on the bench that I've recapped. The horizontal oscillator is not running so I get no high voltage. I'm hoping some one will shout out something I've overlooked. The circuit is below.



Voltages on V108
Pin 1= -154
Pin 2= 145
Pin 3= -120
Pin 4= -154
Pin 5= 50
Pin 6= -120
Pin 7= 6.2vac
Pin 8= 0

I've got 253v on the "left" side of R157 and -120v on the "bottom" side of C134.
R155, R156, R157, and R158 are all on spec and I've swapped C133. The primary and secondary on T104 both read on spec. I've swapped V108 (although only once).

Reference waveform:



Actual:



Reference waveform:



Actual:



What could I be missing?
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