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Louie
Louie, Technician
Category: TV
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Experience:  25+ yrs. experience in the field and 5+ yrs. online, down to component level.
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What does the 15 volts look the y sustain board to make it

Customer Question

what does the 15 volts look for on the y sustain board to make it bad
Submitted: 11 months ago.
Category: TV
Expert:  TV Tech1 replied 11 months ago.

Do you mean what causes the 15 volt power supply to fail on the Ysus board? Usually it's the medium sized transistors short or the signal generator ICs that run those medium sized transistors. The large ones on the heatsinks affect the Vs or Va voltage to that board. Have you checked the Vs voltage pins for shorts too?