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BM 4400 capacitor PC1 frontend

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kbaelden28
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kbaelden28 posted on Mon, Jul 3 2017 9:16 PM

Can someone tell me which capacitor is mounted on the outside of the PC1 frontend? The service manual is not clear on this.

Thanks

Kristof

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Dillen
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Are you asking about the 100nF polyester "tropical fish" visible in the photo?

Martin

kbaelden28
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Indeed, both sides are broken while opening the metal box. So this might be the reason that I'm not getting any signal.

 

Is it a capacitor which is still available today ? Or is there a replacement type?

Thanks Martin!

 

Regards Gard's

Kristof

kbaelden28
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I can't find the 100nF capacitor in the service manual either. 

Dillen
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Beomaster 4400 came with two different tuners.

Any 100nF polyester capacitor will work. It doesn't have to be a "tropical fish" type.
A green or orange drop would be fine.

Martin

kbaelden28
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And which voltage should I take ?

 

Kristof

Dillen
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Dillen replied on Tue, Jul 4 2017 12:40 PM

63V or higher.

Martin

kbaelden28
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Hi,

In other posts I read that these tropical fish are quite reliable, even if the outside cover is cracked.

I've replaced all elco's, tantals and pottrimmers on PC1, PC2 and tuner front end.

I get no signal out of the tuner, some cracks sometimes if I turn the potrimmers and move volume to 10

The signal meter also points to it's outer right most of the time. If I switch the tuner off and on then the signal meter sometimes is between 0 and 5.

 and the stereo indicator lights up.

Where should I look first ? Should I unsolder every component and check their value ? Or should I first start with the tropical fish capacitors ?

Can 'playing' with the replaced pottrimmers cause any damage to the transistors, resistors ??

 

Thanks

Kristof 

 

 

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