I have a SANYO AVM-3289G with no vertical deflection, just a vertical line and audio. Can you please tel me which transistor is the the vertical output on this set? I have ordered the SAMS photofact, just would like to order the parts also.
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Re: SANYO AVM-3289G no vertical deflection
It isn't a transistor, It will be an I.C. with a part number that
probably starts with an LA_ _ _ _ . It will be on a heat sink and
be in the vicinity of the connector going up to the yoke. Try
replacing that. But first, check all the electrolytic caps around
it for testing dry (sorry - takes a special meter to do it in circuit)
or just replace them. May have lost power to the I.C. as well.
Look the I.C. up in the free NTE crossreference at nte.com get a
diagram of its pinout to find what pins the power and outputs are on.
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this is a capacitor that has gone bad in the vertical delfection stage of the tv. it is an very easy and cheap fix if you know someone who knows how to solder and replace electronic components. If not then you'll just have to get another tv as taking it into a tv repair shop is not worth the cost. You could get another tv for what they will charge you to repair it,
Vcc is on Pin 6 of the vert. output IC so you can trace that back to it's feed resistor (not sure the location number but you can find it easily by following the circuit trace).
Depending on what your problem is you may need to replace some
electrolytic capacitors as well. Follow pin 7(pump up) back to it's electrolytic
cap. and look for swelling or bulging. Look for other bulged capacitors in the vertical section. You may also identify a bad resistor by a discolored look but not always, if in doubt meter it. Let me know if you need some more info.
If the vertical is not defective or shorted there is a possiblity of bad solder connections on the vertical ic. If connections are good and has b+ voltage to the chip replace chip which is IC 501 LA7841 or LA7845 and change c511 (decimal point 1 film capacitor)
I don`t know where you live and it makes a BIG difference, the cost of doing business is waaay more in NYC than Peoria. At my shop if you brought it in, approximately $110 plus tax (6% here in Fl.) I`m basing this on the fact it needs the output IC, you may not need the IC it`s possible the 26 volt line is missing to the IC but you asked for a generic guess and that`s what it would cost you here, remember: Big City means big rent which means much higher bill, I`m in a little town in western Fl. hope this answers your question, good luck