help

[cossy350]

hi i need help identifying these parts there out of a 16 channel cctv power supply 40 amp and where can you buy them from
on 1 is 13007T2JO11 AND 13007T2FO11

[SeanB]

MJE13007.

http://www.onsemi.com/pub_link/Collateral/MJE13007-D.PDF

Available to you from RS, Farnell and Element 14. You might even be so lucky to find some at Maplin, though I would not hold out much hope there.

If they have gone bang I would also check the mains bridge rectifier diodes, the input and output capacitors and any high value resistors in the primary side.

[cossy350]

Thanks a lot will this work for both of them as one number is slightly different to the other 1

[SeanB]

Manufacturing batch code and date, they are the same part number and are nominally identical.  The failure will be capacitors and likely resistors going high, though possibly there is a diac in the start up circuit that is dead.

This is very likely a basic generic PC power supply on the primary side, probably with a secondary side regulator and thus it needs to start up first before the control loops run. Pics of the whole board ( front and back) will help as well. there likely will be a capacitor of around 470n to 1uF 630V rating in series with the primary winding of the transformer, which should also be chacked to see if it is shorted or open.

[cossy350]

the caps blow originally 200v 680uf at 105c i could not find the same 1 so i put in 250v and then all the damaged happened is blow 4 resistors gold silver black brown

[SeanB]

The 2 very charred resistors are 390R 0.25W resistors, the others are 1R 0.25W. I have the identical power supply next to me, basic generic PC power supply there, just yours is missing a lot of the input filtering on the mains side. Any reason you can not just stick the board from a cheap ATX supply in there to fix it, you will just not use around half the connecting wires, but it will fit the footprint in the case and the fan will work as well.

[cossy350]

Thanks a lot for that I would like to fix it for the experience but where would I find one them boards just in case

[SeanB]

Go to the local PC store and buy the cheapest ATX power supply you can find, or just grab one out of a dumpster PC, and if it works open it up and use the board from the PSU. At the bottom end they all use pretty much the same power supply inside, in a similar case. Do not believe the ratings label, it might say 150W, 200W, 250W, 300W or anything, but inside it is all the same board.

[cossy350]

I cannot find the 200 v 680uf caps anywhere  is it ok if you go higher voltage or higher uf

[SeanB]

On that style of power supply you can use a 470uF 200V or 250V capacitor, which is very common. Any value from 330uF to 1000uF will work there, as those values are common in that application. Just have to be rated for 200V or higher, and preferably a 105C capacitor. The values of the 2 capacitors just have to be the same along with the voltage.