Question about Sanyo DS24424 24" TV

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Popwers on /off shutdown

Plug set in stand by is there,set turns on b+ regulates at 130v.hv measures 20 kv then shuts down. never see filaments lite. don't have a manual. am thinking ihvt is bad? any help would be apprecieated thanks jim

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Re: popwers on /off shutdown

I just checked with my distributor for the flyback for this model, and it comes up as an inactive part with the notice that Sanyo states they can no longer sell parts for this model, and that you must call sanyo direct at 800-877-5032 for information. They must have serious issues with this set. Sanyo used to put out a good product some 30 years ago, as I recall.

Posted on Jan 04, 2007

Re: popwers on /off shutdown


Posted on Apr 29, 2007

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1 Answer

How to test a tv flyback

Two basic ways--most shops use a ringer---with flyback out they connect across the primary (where sweep transistor collector goes to where that lead on the transformer exits--a good bad indication is seen.

Second way is voltage into the transformer is tested and High Voltage is measured at the CRT---usually if transformer bad you will have 4kv or so (4,000 volts) and the suspect is clear.

If HV just comes up full (over 20 Kv) and drops to zero it is not the problem and something is shutting the set down.

Apr 08, 2012 | Standard (CRT) Televisions

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My sony trintron is stuck in stand by mode

If model number listed here (kv-27fs120) is correct the set if not coming on is in shutdown because either a problem in its power supply or something elsewhere pulling the supply voltages down and triggering shut down.

Someone would have to open and first check for voltages and or shorts--no real other easy way to troubleshoot this.

Mar 19, 2012 | Sony FD Trinitron WEGA KV-27FS120 27" TV

1 Answer

Tv will stay on for about 10 mins. then turn off and then the red light would start blinking tv will not turn back on intil i unplug tv

It sounds like you are describing high-voltage (HV) shutdown. As a safety feature, if the voltage in the TV rises above a set limit, the TV will shut off to prevent possible x-rays from the picture tube. The only way to reset the shutdown is by unplugging the TV, then reconnecting the power.

This shutdown can be caused by several things. The power supply may in fact not be regulating the voltage properly because of component failure. Your power line voltage may be a little higher than usual and causing nuisance shutdowns. Or the HV shutdown control may simply need to readjusted because components have aged and changed value slightly, also causing nuisance shutdown. The HV transformer may be defective, or the picture tube is going bad.

Unfortunately, it's not possible to say what's wrong without seeing the set to check operation and determine the cause. So I can't suggest anything you might do yourself to fix this. If you want to keep this TV you should let a professional servicer check it over, determine what's needed and give you an estimate. Or you can use this as an excuse to purchase a new TV. Flat screen sets are quite reasonably priced now, and depending on what turns out to be wrong with your TV, it might be more economical to replace it.

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1 Answer

Stand by light blinking 7 times. occassionally turns on when pressing reset and power button.

  • Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.
There is a High Voltage fault or power supply fault.
Hope that helps.

Dec 09, 2010 | Sony FD Trinitron WEGA KV-30XBR910 30" TV

1 Answer

If the voltage in h out is 200v is good or bad and the voltage regular is heat?

You mean the collector voltage on the Horz output transistor is 200 volts?

I would check this by removing the transistor and then measuring the voltage on the board (where the collector or center leg of the transistor is soldered to).

I don't know what kind of tv this is but you should see 130v or 135 volts.
RCA sets you should see 140v. If the voltage is too high replace the voltage regulator.

Mar 09, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Sony trinitron,standby lite flashes

Hello mybuddydakot,

This is an indication that the shutdown circuit is functioning which means there is a high current event happening in your set. I would venture to say that the problem may be in your high voltage section. I would suggest that you take the set to a qualified TV repair shop, due to the nature of this possible problem.

The High Voltage section is dangerous and should be worked on by a person who has knowledge of television electronic technology.

I hope this helps,


Nov 18, 2008 | Sony FD Trinitron WEGA KV-36FS120 36" TV

1 Answer

TV will not stay on for longer than 5 minutes

This sounds like the shutdown circuit is shutting down the TV due to an over current condition. This overcurrent condition is caused by a component in the HV section drawing excessive current. the 5 blinks is a visual indication of the problem.

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1 Answer

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).

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1 Answer

Panasonic CT-27SC14

The high voltage should be around 29.5 KV and not fuctuate between 20-30 KV that would indicate a high voltage regulation issue then. Are the filaments lighted up in the neck of the CRT? If so then yes you are probably looking at a low voltage issue such as a 12 volt source or a a/v switching IC issue.

Apr 23, 2007 | Panasonic CT-27SC14 27" TV

2 Answers

Tv screen goes black for a few seconds

do you get sound while screen does black? what do you mean by "until eventually it has turned black and will not come back"? is it black from the minute you turn the tv on untill you turn it off? if sound is good but picture is black, it may be the resault of a fried monitor tube, in this case replacement will cost alot. if sound is dead also, them it is probobly power supply related issue. get out your DMM and measure the voltages in the power supply. When the screen goes black, is there still regulated B+ going to the circuitry? Do you still have HV? Is the filament of the CRT lit? Does the set still have a raster (you may have temporarily increase the screen setting to see it)? Do you measure any of the flyback derived B+ voltages that go to the video processing, tuner, Vertical Deflection, and other circuitry?

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