Question about Sanyo DS25390 TV

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Sanyo DS25390 Vertical problem

Need part number for the verticle output IC in a DS25390-02 chassis. Also any common capicators that cause foldover in the vetical circuit? Thanks :-)

Posted by Jack Ewer on

  • Jack Ewer
    Jack Ewer Aug 11, 2007

    Hi finally got the Sanyo DS25390-02 TV fixed. I replaced C502(220uf/35V) , C516(4.7uf/50V) & C503(3.3uf/50V). The ESR on all 3 of these caps was way out of specs. The verticle IC501 is a LA7841 (NTE 7153). There are also C501(10uf/50V)& C504(2200uf/25V) in this circuit which measured good so I left them alone. After several days the set is playing great. Hope this helps someone else, Happy Trails....Jack



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Perry Mellott

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Jack,Did the Vert Ic have Broken conns around the legs?

Posted on Jul 19, 2007


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Tv has horizontal line in middle of screen,sanyo ds25390

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My sanyo ds20425 has a white horzontal across the screen

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Guide on How to find Vertical IC

Look and check for cold solder joints for IC501

part number

Resolder the pins of the IC , and replace if necessary

Let us know if you need further assistance.

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I lost my system ic i nid part number?

I'm assuming that your TV is Sanyo DS25390.

Click this LINK. Download the Service manual, you can now determine the system IC of your TV. When you are on the link, click "Get Manual" to automatically begin the download.

Dec 14, 2011 | Sanyo DS25390 TV

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Vertical deflection

You will have to inspect the pins of the vertical IC. They may need resoldered. And you may have to replace some of the capacitors in the immediate area of this IC. If you still have a vertical problem you may have to replace the vertical IC.And please check the diodes near this IC, rare but occasionally they will short out.

Aug 04, 2010 | Sanyo DS25390 TV

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Picture folding over at top of screen

Verticle IC needs replaced and also the sodered connections could be bad at the high voltage transformer.

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Black screen white horizontal line help

This is an easy repair if you've ever soldered and would not be too costly for a repair shop to do it for you. The problem is a bad Vertical Output IC (usually mounted on an aluminum heat sink with the part on it labeled LA78?? ) and 1 or 2 bad capacitors. Some times you can even fix the problem by re-soldering the contacts of the IC- To find the IC follow the 4 wires that come from the Yoke (which is a contained coil of wires slipped over the neck of the picture tube(s)) back to the board. 2 of the wires go to the horizontal o/p and 2 to the Vertical o/p the thinner gauge wires are for the vertical.

Sep 30, 2009 | Sanyo DS25390 TV

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Dec 31, 2007 | Sanyo DS25390 TV

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Straight line picture

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

DS25390 Verticle foldover

If you have a picture but the top is folded over, your vertical IC is probably good and you need to replace the pump-up capacitor next to the IC. When the pump-up cap (typically a 47 or 100uF 35V cap) is open then the picture will have white lines and foldover at the top. The typical vertical output IC is the LA7838, but I am not familiar with exactly which output IC your set uses.

Jul 02, 2007 | Sanyo DS25390 TV

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