Using a 33uF 160V cap instead of a 22uF 160V?

Thread Starter

Nicholas

Joined Mar 24, 2005
139
Hey all!

I just wanted to know if there's some special rule or something regarding
this. I have a monitor board with a bulging capacitor 22uF 160V...and the
only cap I have right here to replace it with is a 33uF 160V. Is that ok,
or is it bad?

Thanks again!

Nicholas
 

bertus

Joined Apr 5, 2008
22,277
Hello,

It depends on what part of the schematic it is used.
If some timing is dependend on it you can not replace it by the larger one.
If it is over the powerlines it will work.

Greetings,
Bertus
 

Thread Starter

Nicholas

Joined Mar 24, 2005
139
Well, it's just a singleboard chassis (and neckboard)

I wouldn't have the slightest idea what the cap does:)

Here's a picture of the present cap(to the right)


If timing gets off, would that only be something like image-problems on the CRT?
 

beenthere

Joined Apr 20, 2004
15,819
The function of the cap is possibly a filter for DC ripple. If that is the case, then the larger capacity won't hurt.

The old one is going to let it's insides bow out very soon. Observe the polarity, substitute the larger cap in, and see if all is well. It's not likely to cause harm.

Note - if the cap filters the output of a SMPS, it should be a low ESR type. It could get hot and fail otherwise. At least you won't be any worse off.
 
Last edited:

mik3

Joined Feb 4, 2008
4,843
The function of the cap is possibly a filter for DC ripple. If that is the case, then the larger capacity won't hurt.
If you replace the capacitor with a bigger one the current spikes will be larger and may destroy the bridge rectifier or other parts of the circuit.
 

Audioguru

Joined Dec 20, 2007
11,248
The capacitor looks as old as me and I am an old geezer.
Electrolytic capacitors are inexpensive. Replace them all.

The product looks inexpensive. Replace it with a new one.
 
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