Sony tv there is sound but no picture only horizontal line
Hey buddy! i am a newbie technician i repair a sony tv model
no.kv-19apr2, it has sound but no picture only horizontal line. i
don'thave service manual, i have suspected that the problem might be
abroken vertical IC, supply voltage at vertical section a diode or
anopen resistor maybe. i look this IC number at the ECG replacement
guidefor me to know what is the supply voltage for this IC and what pin
buti didn't find it in there. so pls. help me, what more i need to
checkand test before i replace the this vertical IC...
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You have stated that your TV has a lot of horizontal lines before it went off picture. We say that lines as retrace lines. So many of them will there on the entire screen, at about one inch or so apart, horizontaly scattered along with picuture. At that time, you may be unable to down the brightness control also. Even though you have reduced the brightness control to zero position, there will be some brightness level on the screen. You should have to repair that fault at the begining. There is a voltage going to the picture tube base, known as screen voltage. That voltage determine the emission of the picture tube, and we call it a bias voltage. When it goes higher than normal, this trouble ie retrace lines will occur. In long run it may spoil the picture tube itself. I don't know what the case of yours.
Anyway it is best for you to consult an experience technician in this case. Ok.
6 blinks usually means a loss of the horizontal signal. This can be as simple as a bad capacitor or jungle IC. I'll look up your specific model, but do you intend to repair this yourself? If so, please update this and I'll provide additional details and instructions.
the problem there is a loose connection on the board,you said that you smacked the right side of the tv and it goes normal.there are parts that should be resolder on the board in order to back into normal operation.
There are no adjustments for this problem,if the unit has been working good for 3 years and suddenly gives you this pix is time to call a qualified technician,among many reasons you might have loose solder conections in the horizontal drive circuit or poor regulation problem in the power supply,if you dont know how and where be safe and call a Technician.