Need help finding the right resistor

[soul73]

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:

 

[Harald Kapp]

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]

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.

 

[(*steve*)]

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]

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]

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]

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]

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.

 

[davenn]

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

99.99999% of the time their pink body colour identifies it as a capacitor .... just one of those things you learn doing electronics

 

[soul73]

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.

10V capacitors seem to be hard to find. Do you think a 50V one would work too?

Something like this: https://www.conrad.de/de/keramik-ko...584-mm-kemet-c322c473k5r5ta-1-st-1420325.html

 

[(*steve*)]

As I said, 10v or higher

 

[soul73]

Steve, thanks a lot.

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

Time to read up on capacitors I think.

 

[(*steve*)]

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]

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.

 

[davenn]

Again, anybody know what kind of cap it is? I assume it's non-polar.

not sure of their makeup ... couldn't find anything obvious on google
yes non-polar

 

[soul73]

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!

 

[Bluejets]

not sure of their makeup ... couldn't find anything obvious on google
yes non-polar

Apparently it's ceramic

 

[harika]

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

 

[davenn]

Thanks for your question....I never heard of the capacitors with color code,

you must be a young lad

Dave