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How many active volts on sanyo backlight - Sanyo Televison & Video

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Tv back light problem


If the backlight is glowing then there is no problem with backlight. Check the high voltage circuit first where the 120 volts AC enters the TV. Then first the transformer, check the DC voltage on the capacitor - should be at least 390 volts. If not, replace it. The one is 100 uf rated450 volts. When I check my high voltage it was only 380 volts. So, I used two capacitors in parallel 150 uf and 220 uf (both rated at 400 volts, and that fixed the problem.

Jan 05, 2018 | Samsung Televison & Video

1 Answer

I have a sanyo 42 inch dp42d23 has sound but no picture. we were told to look on youtube to fix but its not helping. what can be wrong?


Press the MENU button on the remote. If there is no menu wording displaying on the screen, then it's the backlight. Shine a torch onto the screen panel and see if you can see a picture (yes, TV has to be on and tuned in). If you see a picture, then it'll either be the backlighting or the backlighting power supply.

Sep 07, 2017 | Sanyo Televison & Video

1 Answer

Sanyo 42 inch LCD TV - Could the back light inverter be the cause of not getting any power? There is a red light on it and that is all


> Could the backlight inverter be the cause of not getting any power?

If the set uses a fluorescent backlight (many use LEDs instead) it will not prevent it from turning on so at least audio should be present.
With no backlight. you will not see any video but the set will receive and audio will work.
If you replaced the (main) power supply with a 'pull' (removed from another set) it may have failed like your original one.

Jun 25, 2015 | Sanyo Televison & Video

1 Answer

I have a Sanyo 32in LCD TV model# DP32746 it has a slight shading across it, what could be causing this?


Sounds like a partial backlight failure. Backlights tend to be several thin light strips, and it sounds like one has become damaged or possibly just disconnected from the circuit board.

May 20, 2015 | Sanyo Televison & Video

1 Answer

Sanyo dp42647 video goes on briefly then turns off still have sound


If you have sound, do you see a faint picture from an angle? I'm thinking backlight is out. Or the inverter that controls the backlight is out...I'm not sure where the high voltage caps are yet.

Mar 26, 2012 | Sanyo Televison & Video

2 Answers

D42849 HAS NO PICTURE


You need to check inside the set to see if the main board has 5 volts going to it on one of the white fuses on the board. If it does then it is likely that the main board (one with all the jacks) is not turning on the power supply to the inverter board so the screen will light. To confirm the power supply is working you need to check for the 12 volts and 24 volt from the power supply plug. If especially the 24 volts is there then you have a bad inverter board. Usually located on one side of the chassis. Check for domed capacitors. A capacitor is a cylinder shaped component with a positive and negative connection. A bad one will be pooched up at the top. Check the power supply for these as well and replace with the same mfd and voltage rating.

Nov 02, 2011 | Sanyo DP42849 42 in. HDTV

1 Answer

Sanyo lcd tv 20"has sound but no picture


0ne of 3 has failed:
(in order of probability):

1. Backlight inverter
2. Power Supply
3. Backlight

Please seek the expertise of an experienced TV repair technician - as they contain potentially lethal voltages that must be properly discharged before work can begin.

Thanks! ! ! !

Apr 20, 2011 | Sanyo CLT2054 20 in. EDTV-Ready LCD...

1 Answer

Sanyo Vizon T.V. No sound, no pic


No,this is the internal hard ware power supply problem

Jun 01, 2009 | Sanyo DP32746 32 in. LCD Television

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