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How to locate vertical output ic on mainboard

I have a sharp tv 32u-s50b.I want to fix it myself.somebody told me that it is the vertical output ic.but I don't know where it is.i have the service manual ,but it does'nt say nothing about that part.Please help


                                                            Thankyou
                                                                      Raul 

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This should be a small flat IC attached to a heatsink and will be marked TA8427. I think this one has about 11 pins in it.

Dan

Posted on Jan 26, 2009

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Where is horizontal scan out put section?


Hi Majid
Just contact any service technician to repair your TV. It will be best for you.
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I have a sharp tv. the problem is when i turn on the unit it shows a single horizontal line then immediately relays clicks then turns to stand by mode. i already change the vertical ic.


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In most cases the vertical output IC and possibly a fusible resistor off of the high voltage transformer are bad. The vertical output IC is located on a heat sink and usually right next to the vertical yoke winding connectors that are green and yellow in most sets. Please take a moment to rate my answer..Thanks...

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Hello yyimerr1,

This is a vertical deflection problem, These are the possible causes:

1) bad vertical coupling capacitor
2) bad vertical output IC
3) bad vertical driver IC
4) bad CRT deflection yoke

Troubleshooting needed:
1) using the TVs schematic locate the driver IC the output IC and the CRT yoke transformer.
2) using an oscilloscope look at the vertical driver signal it should be a sawtooth signal from the driver to the yoke (increasing in amplitude for each section, i. e. driver and output).
3) if no sawtooth patter is seen that is your problem, look for the component in the section where signal is entering but nothing is coming out.
4) replace the components

Now let me tell you something, don't continue to play the TV with the line present with brightness applied, this will burn the image of the line into the phosphorous coating of the CRT.

I hope this helps

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Maybe a problem in deflection section. If there is a problem in these section the micom ic is trying to protect to continue anymore short circuit. Or there is a leakege in power supply section. This could be fixed by service technician only. Better to call nearby service people.

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It is a simple trouble, tv has got dry solder joints in the vertical deflection circuit. Resolder vertical output ic pins and related components, this will be okay.

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