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Beomaster 5500 T4a fuse blows every time power is connected

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dan1969
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dan1969 posted on Sat, Apr 27 2013 6:25 PM

hi ...

I have no electrical engineering knowledge... i have a multimeter but v.little idea how to use it..

so now you know what your up against! Smile

Therapeutic as it is watching the fuse blow i figured it wasn't worth sacrificing a 3rd one to watch it go up in an orange flash.... so i need help understanding the potential root cause(s).

The fuse is located after the power relay and big copper coil thing. Its the next component in the circuit after the big copper coil thing plugs into the circuit board with the two green wires.

In terms of power flow is the issue likely to be upstream of the fuse between the mains power cable connecting to the narrow board with a cap and unidentified resistor/transistor type things) or it could be an issue down stream in the main body of the unit?

I know this is a weak assed description but if you know where to look i can follow instruction well despite my total lack of understanding.

Dan

 

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Dillen
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Dillen replied on Sat, Apr 27 2013 7:13 PM

I answered your PM regarding this.

Martin

Beobuddy
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Beobuddy replied on Sun, Apr 28 2013 12:00 PM

Another BM5500 for the "Workbench" then.....

 

dan1969
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dan1969 replied on Sun, Apr 28 2013 12:05 PM

Yep... Dillen reckons its nearly always caused by the 4700uf 16v cap at c15 so I will swap it out and hope I don't mess it up:) still have to rremove quite a lot of stufff to get to it but seems straightforward  enough.

Dillen
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Dillen replied on Sun, Apr 28 2013 1:30 PM

The only thing you will have to remove is the bottom plate.
With a little skill, you will be able to desolder the old capacitor without taking the whole module
out of the Beomaster.

Martin

dan1969
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have put it back together... :)

just awaiting part ...

there seemed to be a variety of 16v 4700uf out there from same supplier got panasonic radial eeufk1c472L - hopefully it does te same job only diff i could see was the old one was +85degrees this is 105 degrees. does it make any difference in this case?

 

Dan

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