Jamma Power Supply Missing Burnt Parts

kb0jjn

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I have no idea what make it is the model number on the board is
py-tv-a 8850

I can find no other marking or lettering only something looking like a triangle and some kind of sysco type C.

The Resistor is marked R33 and it looks to be about a 1 Watt or more so I think it has a small resistance. The cap. is completly gone and left some kind of black stuff on the parts around it.
There is a cap after the resistor that is 1000uf and after the missing cap is another cap 100uf...both 16 volts.
The ic chip is a tl494cn
 
Many times I have tried to post a pic here but it is too big or since I am on dial-up it take a very looooong time. Many times one of the kids...usually a teenager...will pickup the phone = lost connect.
 
It did not work for me today. The other day it worked fine what is diffrent and what can I do to make more better.
 
Those numbers on the circuit board indicate it was manufactured by Pan Yes Company in Taiwan. If this is the "XT" computer case style power supply, then this guide will help:

http://home.comcast.net/~mtpacifico/_kenskorner/files/Pan Yes Powermaster 3 Repair Guide.pdf

If this is the screw terminal Pan Yes, then that burnt resistor is 100 ohm @ 2 watts. The resistor burns when the electrolytic capacitors go bad.

Pan Yes is a knock off of Peter Chou power supplies. The screw terminal Pan Yes supplies usually are in a black painted case.
 
Those numbers on the circuit board indicate it was manufactured by Pan Yes Company in Taiwan. If this is the "XT" computer case style power supply, then this guide will help:

http://home.comcast.net/~mtpacifico/_kenskorner/files/Pan Yes Powermaster 3 Repair Guide.pdf

If this is the screw terminal Pan Yes, then that burnt resistor is 100 ohm @ 2 watts. The resistor burns when the electrolytic capacitors go bad.

Pan Yes is a knock off of Peter Chou power supplies. The screw terminal Pan Yes supplies usually are in a black painted case.

I been dealing with computer for years and years and I find it amazing that you can pick out these details My hats off to you..

By the look of the power supplt you see that brown suff on the right side under the cap. This is a Typical sign that the power supply caps are leaking. It would explain why your resister burned down.
Now is a powersupply like this fixable? Yes but rarely is it worth your time and effort.
replacement is always thye quicker option.
 
I have bought another power supply but while I am waiting I want to fix this for a bench top supply. I have been doing a lot of de soldering on my Galaga boards. Replacing these few parts would be a welcome break. Here is a pic of the new supply and the ebay item number. I liked the free shipping.



ebay item number 330571172387
 

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Those numbers on the circuit board indicate it was manufactured by Pan Yes Company in Taiwan. If this is the "XT" computer case style power supply, then this guide will help:

http://home.comcast.net/~mtpacifico/_kenskorner/files/Pan Yes Powermaster 3 Repair Guide.pdf

If this is the screw terminal Pan Yes, then that burnt resistor is 100 ohm @ 2 watts. The resistor burns when the electrolytic capacitors go bad.

Pan Yes is a knock off of Peter Chou power supplies. The screw terminal Pan Yes supplies usually are in a black painted case.

None of the cap. values are the same as mine but I don't think that is as much of an issue as the resistor value. This is for the +12vcc line so I am thinkin it must be one of the 16 volt caps. Since there is a 1000 and 100 uf cap I am also thinking it must be 2200 uf.
The case was a brown and looked like the one pic. above.
 
It turns out the missing cap is actually an inductor of some sort. Here is a pic with parts removed.
 

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I thank you so much. This really helps me out a bunch. I don't like to work on anything without a schematic....
By the way looks like this is your first post...Welcome.
/bill
 
Tired of being a lurker

Yeah, I've been in the "biz" for almost 30 years.
Use to write for STJ in the late 80' and early 90's.
Got out of the tech game and started my own R&D firm.
If I were a betting man, I would guess that you could grab a 68uH to 220uH inductor and get away with it. The caps are mondo enough to give you some play in inductor choice. Just make sure it is rated for the current you expect to pull.
 
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