Sanyo 20-EZV Help Please!

paulliadis

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So I was cleaning out my Donkey Kong Junior this evening and noticed something not so good in the area of the sound amp. A part labeled "V630 Sanyo" is melting/corroding/? on the "Control Unit" below it (the one with the Bright, V-Center, V-Hold, etc).

I have attached some pics to this post, so please refer to those. I have a few questions.

1. Is the game "safe" to play as is? I'm guessing not, as I don't want any more damage done.

2. What could be causing the problem? Is "V630 Sanyo" just old and need replacing?

3. Where can I obtain a new "V630 Sanyo"? Anybody have one of these bad boys lying around? I'll be your best friend forever.

4. How do I remove "V630 Sanyo"? It's soldered in place. Can I snip the wires? And if I do remove "V630 Sanyo" is the game safe to play?

Thanks in advance for any information. The game has had nearly non-existent sound since I've had it and I've been under the impression I need to do an audio cap kit. Perhaps not.

Paul
 

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If I connect the red and white wires to the speaker I get a really loud humming type sound. By really loud, I mean almost unbearable.

Without those two wires connected, I get a very faint sound. I can make out some of DKs sound, some jumping sounds, and faint music. I have a picture of that setup attached to this post. The only wire connected to the speaker frame is a green wire. I have the red and white wires connected to a cheap set of pc speakers, which was the previous owner's attempt to skirt the issue. I mostly don't use these.

Does this help?
 

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That is the sound transformer, and it appears to be failing. When you replace it, the loud unbearable humming "should" go away. There are no new ones to be found, but there are plenty of good used ones available.
 
That is the sound transformer, and it appears to be failing. When you replace it, the loud unbearable humming "should" go away. There are no new ones to be found, but there are plenty of good used ones available.

Do you know where I could score one of these good used ones?

If you were me, would you hold off on playing the game until it was fixed? Does it make sense to snip the wires to remove the thing, rather than try to de-solder them (I don't have a de-soldering device).

Sorry for all the questions. I don't have a lot of electrical wiring experience, though I'm trying to learn.

Paul
 
It won't hurt anything I know of.....besides your ears! :)
Bob Roberts might have one? If not you could always try posting a "WTB" ad in the WTB section here. Someone will have one.......
 
Radio Shack still sells desolder braid....I think.... easy to desolder....
If not just snip them as close to the sound transformer leads as you can.
 
Radio Shack still sells desolder braid....I think.... easy to desolder....
If not just snip them as close to the sound transformer leads as you can.

I figured that and also that it would be easy to desolder. That said, I'd rather not buy the desoldering thing since the part is trashed anyhow and I'm gonna have to spend money on a new one.

Thanks for the reply. I'll snip them as close as I can.
 
I found one and resoldered a couple wires that were off, but it should be pretty much plug and play, it's got both connectors on it. You just need to unscrew the old one, screw this one on and plug in the two connectors were that one's plugged into.

I'm just glad someone can make use of some of the parts off my two messed up chassis.

I will send it out tomorrow, I'm alone at the store today so can't get to the post office.
 
I found one and resoldered a couple wires that were off, but it should be pretty much plug and play, it's got both connectors on it. You just need to unscrew the old one, screw this one on and plug in the two connectors were that one's plugged into.

I'm just glad someone can make use of some of the parts off my two messed up chassis.

I will send it out tomorrow, I'm alone at the store today so can't get to the post office.

You are a gentleman and a scholar cwales. DK Junior will have sound once more!
 
Just found this old thread.

Anyway, those Sanyo V630 audio output transformers are coated with wax at the factory. As with any wax coated component, evently heat in the cabinet melts the wax and it runs off the component. That transformer is probably ok.

I noticed in your pictures that your amplifier board still has all it's original electrolytic capacitors. This is where your loud hum is coming from. You need to recap the amplifier board. The board is easy to remove from the monitor to work on it. One Phillips head screw and unplug a few connectors on the board and it comes right out so you can set it on your workbench.

Bob Roberts sells a capkit just for the amplifier board.
 
Just found this old thread.

Anyway, those Sanyo V630 audio output transformers are coated with wax at the factory. As with any wax coated component, evently heat in the cabinet melts the wax and it runs off the component. That transformer is probably ok.

I noticed in your pictures that your amplifier board still has all it's original electrolytic capacitors. This is where your loud hum is coming from. You need to recap the amplifier board. The board is easy to remove from the monitor to work on it. One Phillips head screw and unplug a few connectors on the board and it comes right out so you can set it on your workbench.

Bob Roberts sells a capkit just for the amplifier board.

Thanks for the reply Ken. I would up doing the cap kit and everything works fine now.
 
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