In TV if three is no brightness but sound is normal, the trouble could

1.	In TV if three is no brightness but sound is normal, the trouble could be in
A.	horizontal oscillator
B.	vertical oscillator
C.	both [a] and [b]
D.	none of the above
Answer» B. vertical oscillator

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In TV if three is no brightness but sound is normal, the trouble could be in

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