Av123 MFW-15 power supply problem

[Khron]

Re: Av123 MFW-15 power supply problem

<Nevermind, i mis-read some things>

[xXDigitizerXx]

Re: Av123 MFW-15 power supply problem

Hi, I recently bought this sub. However, the person that sold it told me that the power does not work but the sub is still usable if I hook it up to a separate amp. I was able to hook it up to my Inuke6000 DSP and the driver works.

Turning the power on the sub and set it on auto will lit up the green light but If I i select auto it will lit up the green light for a short period of time but shortly after that, it will turn back to red.

I also smelled burning smell inside the of the sub. I opened it and discovered several capacitors burn/ blew up.

As for the power supply board, the C4, R1, R2 capacitor is blown.

The power supply listed as MFW-15_POWR v2.1 and I listed in the attachment below.

I found several links that showed how to replace the capacitor to fix the hum but not to replace the other broken capacitor. Can someone point out what is the value of the R1 and R2 capacitor and which capacitor I can replace it with?


Any help would be appreciated thanks,

https://imgur.com/ZiVn2RT that is the link to fix the hum with the replacement capacitors.

Ceramic discs are 104M 50v Y5u 1nf 20%.. your resisters in R1 and R2 are different colors than mine and they are the same boards. I can't tell for sure what the color bands are on mine either sucks.

[xXDigitizerXx]

Re: Av123 MFW-15 power supply problem

https://www.badcaps.net/forum/attach...2&d=1519405455
Can I get straight shot pictures wit less glares so I can clearly see the traces?
The resistors looks to bleeder resistors to discharge those 4 large filter caps, the small ceramic disc caps are for high frequency filter and they are connected in parallel with those big caps.
BTW, you also have bad brown problem, they are corrosive and conductive and must be removed.
Can we also get good clear pictures of other board as well?

I am currently trying to repair this same amp.. mine is blowing fuses. I have r1 and r2 1 leg unsoldered to test, it's reading .692 on both r1 and r2. I removed D1 diode cause it was letting voltage go both ways ( I suspect thats what is popping fuses) the R1 on the other board you can see has a chip in it but reads out at .692 like the other one altho both them have different color bands...

[Gr33d]

Re: Av123 MFW-15 power supply problem

Yes sir, i'll update it tomorrow currently at work. Thanks for the quick replied.

[budm]

Re: Av123 MFW-15 power supply problem

https://www.badcaps.net/forum/attach...2&d=1519405455
Can I get straight shot pictures wit less glares so I can clearly see the traces?
The resistors looks to bleeder resistors to discharge those 4 large filter caps, the small ceramic disc caps are for high frequency filter and they are connected in parallel with those big caps.
BTW, you also have bad brown problem, they are corrosive and conductive and must be removed.
Can we also get good clear pictures of other board as well?

[Gr33d]

Hi, I recently bought this sub. However, the person that sold it told me that the power does not work but the sub is still usable if I hook it up to a separate amp. I was able to hook it up to my Inuke6000 DSP and the driver works.

Turning the power on the sub and set it on auto will lit up the green light but If I i select auto it will lit up the green light for a short period of time but shortly after that, it will turn back to red.

I also smelled burning smell inside the of the sub. I opened it and discovered several capacitors burn/ blew up.

As for the power supply board, the C4, R1, R2 capacitor is blown.

The power supply listed as MFW-15_POWR v2.1 and I listed in the attachment below.

I found several links that showed how to replace the capacitor to fix the hum but not to replace the other broken capacitor. Can someone point out what is the value of the R1 and R2 capacitor and which capacitor I can replace it with?


Any help would be appreciated thanks,

https://imgur.com/ZiVn2RT that is the link to fix the hum with the replacement capacitors.