2007 Samsung 5-Disc DVD Home Theater Receiver issues

[vortalexfan]

Hello Everyone, today a friend of mine brought me a 5-Disc DVD Home Theater Receiver from 2007 that was made by Samsung that apparently the cooling fan for the amplifier section had failed which had in turn caused one of the many .47 µF 100V film capacitors in the amplifier to blow up in there and what I thought might of also been some of the many noise canceling inductors inside the amplifier to fail as well but when I measured them the measured and they didn't measure open or shorted (but they were kind of sitting crooked on the board which I thought might of been a sign that they were bad but there were no burn marks on the board near them.)

So my question is, can I install a .22 µF 100V Capacitor in place of the .47 µF 100V capacitor for testing purposes? I would have to order the correct .47 µF 100V capacitor to make the correct fix.

Also as for a replacement fan for this Home Theater Receiver, would something from Mouser or Digikey or Parts-Express work? Or would I need to special order that part from a computer parts supplier?

It looks like its just a standard laptop or micro-computer cooling fan.

Thanks for your help in this matter, this is my first repair attempt on something like this (I've repaired many stand alone stereo receivers and video reproduction devices but never any combo units like this before.)

[old_tv_nut]

The cap value criticality depends on where it's used in the circuit. If part of the vertical sweep, the answer is no. If part of the power supply, the answer is that somewhat larger is generally OK, smaller generally not. Do you have two .22 uf you could put in parallel to make .44? That would work fine.

[vortalexfan]

Originally Posted by old_tv_nut

The cap value criticality depends on where it's used in the circuit. If part of the vertical sweep, the answer is no. If part of the power supply, the answer is that somewhat larger is generally OK, smaller generally not. Do you have two .22 uf you could put in parallel to make .44? That would work fine.

Its in the amplifier circuit itself, I think its in the crossover network as there's about a dozen or so .47 µF 100V capacitors all in a line next to (parallel?) with about a dozen inductors and they all tie into the speaker hookups on the back of the receiver.

I do have a couple of .22 µF 100V capacitors that I could parallel to make .44 µF 100V and I thought of doing that but I wasn't sure if that would of been appropriate in such an application.

[old_tv_nut]

If part of a crossover network, then the value you finally sub should be close for proper crossover frequency. BUT you could temporarily use the wrong value in order just to check the unit is operating.

[vortalexfan]

Originally Posted by old_tv_nut

If part of a crossover network, then the value you finally sub should be close for proper crossover frequency. BUT you could temporarily use the wrong value in order just to check the unit is operating.

That's what I was thinking, I mainly wanted to check to make sure the unit was operational and that the amplifier chips didn't get fried when the unit overheated.