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Need help finding the right resistor

soul73

Oct 27, 2016
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Hey guys,

I have a sampler (year of construction: circa 2000) with a broken resistor.

Now I have problems recognizing the colors correctly as well as the tolerance ring. Fortunately I have the service manual of the sampler. But all this tells me about the resistor is the number 473.

After some research I have then found that 473 stands for a 47 kΩ resistor. Unfortunately I am missing the specification of the tolerance.

Can you help me?

Here are some pics:

WP_20161026_009_dtl.jpg


Unbenannt_1.JPG


WP_20161026_009.jpg
 
Last edited:

Harald Kapp

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Welcome aboard EP.

yellow-violet-orange = 473 = 47*10^3 -> 47kΩ, that's correct.

But: the schematic shows a capacitor, not a resistor. Then the same color code means 47*10^3 pF = 47 nF.
A capacitor at this position is more plausible than a resistor as it will filter the potentiometer's output signal.
Also, for a capacitor a white tolerance band makes sense (it doesn't for a resistor): 10 % (see e.g. here).
 

soul73

Oct 27, 2016
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Hi Harald,

Thanks for your reply.

So it is a capacitor, great. Now the color code makes sense.

Now I´ll need to find a store that carries this type of capacitor. Since I am a noob at electronics the amount of different capacitors on Mouser, farnell and the likes confuse me.

EDIT: I now came up with this search on mouser: http://www.mouser.de/Passive-Components/Capacitors/_/N-5g7r?P=1z0wquaZ1z0x6d8Z1z0z819

I am not sure which voltage rating I need to tick.
 
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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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It's hard to tell what voltage rating is required but it is likely to be fairly small. 10V or anything higher would likely be very safe.
 

soul73

Oct 27, 2016
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Hi Steve,

Thanks for your reply.

Strangely, the potentiometer works regardless of the damaged capacitor. Maybe I don´t really have to change it immediately?
 

Harald Kapp

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The missing capacitor may result in increased noise...

You don't have to use an an axial type of capacitor. A radial type, which I think is much easier to obtain, will work the same way. Leads can be bent to fit the existing holes or find one with matching pin pitch.
Here's an example.
 

soul73

Oct 27, 2016
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The missing capacitor may result in increased noise...

I guess I should have mentioned that the potentiometer isn´t adjusting audio signals, it it adjusting different parameters in the sampler (such as attack, release, LFO speed, etc.).
 

Tha fios agaibh

Aug 11, 2014
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What type capacitor is this, and is there an easy way to differentiate it from a resistor?

If it wasn't for the schematic and the "c" marking on the board I'd think it was a resistor.
 

(*steve*)

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As I said, 10v or higher
 

soul73

Oct 27, 2016
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Steve, thanks a lot.

I thought maybe a too high voltage rating will damage something, hence my question. :oops:

Time to read up on capacitors I think.
 

(*steve*)

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No, just like putting tyres with a higher speed rating on your car doesn't make you go faster, placing a capacitor in a circuit that can withstand a higher voltage won't make that voltage magically appear.
 

Tha fios agaibh

Aug 11, 2014
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99.99999% of the time their pink body colour identifies it as a capacitor .... just one of those things you learn doing electronics
Ok thanks.
Perhaps the "pink" resistors I've seen were just faded or discolored beige or toupe?
Again, anybody know what kind of cap it is? I assume it's non-polar.
 

soul73

Oct 27, 2016
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Hey guys,

I just wanted to let you know that I´ve changed the capacitor with this one (
MLCC X7R 47nF 10% 50V RM5,08) and all is well.

Thanks again for your help!
 
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harika

Feb 15, 2016
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Hi Harald,

Thanks for your reply.

So it is a capacitor, great. Now the color code makes sense.

Now I´ll need to find a store that carries this type of capacitor. Since I am a noob at electronics the amount of different capacitors on Mouser, farnell and the likes confuse me.

EDIT: I now came up with this search on mouser: http://www.mouser.de/Passive-Components/Capacitors/_/N-5g7r?P=1z0wquaZ1z0x6d8Z1z0z819

I am not sure which voltage rating I need to tick.


Thanks for your question....I never heard of the capacitors with color code, until i came through these articles in google http://www.tpub.com/neets/book2/3g.htm
http://www.electronicshub.org/capacitor-color-codes/....though these two explained how to calculate the capacitance value , they did not show any circuit in real time using these capacitors..Ur question helped me.Thanks a lot
 
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