hace 5 años
Greetings, this is a 21pg General Plus TV model CB2195F which has vertical failure (LA78040), already check the plate and solve cold welds, to have another LA78040, try changing it and the fault persists, I proceeded to measure voltages in the Vertical IC and I have the following:
pin 1 = 1v
pin 2 = + 13v
pin 3 = + 1v
pin 4 = -12v
pin 5 = -10v
pin 6 = + 13v
pin 7 = intermittent 1 and 0 volt
in the anode of the diode that goes between pin 3 and 6 there is + 13v, superficially I do not see deteriorated components near the vertical circuit, attentive to any suggestion
PD: there is no sweep only from the middle down
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