Question about Sanyo HT32744 32" TV

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Sanyo DS31650 31

As a science and tech nut decided to take on the tv for learning problem and what i have done.. 1-typical power-on seconds later HV shutdown 2-replaced Horiz Out Transistor 3-it worked!,but, width became wavy and HV shutdown after 45 sec.Had trouble adjusting white balance. 4-replaced flyback transformer. improved white balance, still shutting down 5-voltage checks in multiple points on board seem to all be around 2x listed rating of said points. suggestions?????

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Re: Sanyo DS31650 31

If the set runs at all, your flyback and output transistor are good. If the set shuts down after a few seconds and the sides are wavy, it usually means that the main B+ in your power supply is too high and not regulating properly. I do not know what kind of power supply that model uses, but if has an old-style STR regulator (like the STR30130) then it is probably shorted, and if the set uses a switching power supply then look for an open or leaky electrolytic cap on the primary side. If the power supply is working correctly and the set shuts down, check for an open safety cap (the large 1.6 - 2Kv cap connected to the collector of the horizontal output transistor).

Posted on Aug 18, 2007

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SANYO TV WILL NOT TURN ON TICKING NOISE FROM REAR Above is your service and repair manual, Below is your user manual, please use these and you should be able to get a result.
This is a classic switchmode power supply, shutting down to avoid a fire, explosion, or both. This set had developed a problem, that is so severe that the set must be shut down, This set should be removed from the Power, and in my professional recommendation, you should get a "Quote" for repair, from, an Akai, Approved Service Center, this point is very important for a good result, Always contact, their local, "Head Office" Now, when you get the information you want, then you can decide as to repair of replacement. The reason we want an approved agent, is that way, all the engineers are trained on their own brand sets, they have seen almost all faults, and will get the job done quicker, and for less cost, and usually have parts on hand.

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Sanyo ds31590 picture's very dark and red

sounds to me that your picture tube needs rejuvenated.
You will need to get it done by a tech.
mechanical doesn't mean a thing when it comes to electronics.
Mechanics when working on electronics, end up costing more damage when you end up taking it to a tech.

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If you were able to tap on the set to get it working, then it means that the solder joints on the vertical output IC are cracked and loose. This is very common on those sets. Now, the pins of the IC could be so loose that they just wont work anymore, and simply resoldering the pins of the IC will cure your problem. However, it could also be that the loose pins have caused the IC to short out inside, in which case the IC will have to be replaced and most likely a small resistor in its power supply too. If you do not have experience working on things like that in TV sets, allow a qualified tech to handle it for you.

Aug 30, 2007 | Sanyo DS25390 TV

1 Answer

Sanyo television

That set is probably not ready for the dump yet. The buzzing sound could be the power supply going into shutdown because of a shorted secondary supply, usually a shorted horizontal output. A good tech should be able to fix that at a reasonable price.

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The main power supply, or the horizontal output stage may have failed. Sometimes when the horizontal output stage has failed parts, the power supply is also damaged.

An experienced tech should be able to troubleshoot your set for you and replace the defective parts.

Jerry G.

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You could have a power supply problem or a sweep supply problem. If you have had any TV repair experience, you will need to get a schematic and go from there. if you have not and still want to learn, Please read the article im posting for you. A tv set is not a place to be poking around in if your not sure where to poke. Good Luck Please do not forget to rate this thread.

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There is a bad solder connection in the vertical sweep circuit. if you know how toi solder, go and find the vertical output IC and resolder that first.. but if you have no solid state electronic repair experience, please find a trained tech to assist you in this repair, as if you wait it may end up costing you double of what it would now, so haveit done ASAP. Good Luck Please do not forget to rate this one.

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