Do Ceramic Disc Caps Leak?
 

I opened up a used Enermax EG351P-V computer power supply to inspect
before installing in a system. All the electrolytics looked good and
I believe the power supply is working fine (I've included no-load test
results). But near one of the heatsinks I found this:

http://img178.imageshack.us/my.php?image=powerkd2.jpg

A blue epoxy dipped disc capacitor was leaning up against one of two
standing power resistors that it is installed between. I pried it off
of the smaller resistor and you can kind of see where it was attached
(the clean spot on the smaller resistor). I chipped off some of the
brown gunk and it is very similar looking to other hot melt glue used
in the PS to glue down the larger electrolytics, but also appeared a
bit different, dirtier perhaps (maybe burnt?). You can also see what
could be a smear of this same brown glue on the larger resistor.

So, is it possible that the disc capacitor was purposefully hot glued
to a power resistor? I believe the reason would be to keep it away
from the larger power resistor which might damage it more. Do disc
caps leak like electrolytics?

No lead readings:
red: 5.11
yellow: 12.3
white: -4.7
orange: 3.43
blue: -10.66
purple, grey: 5.11

Do Ceramic Disc Caps Leak?
 

There's nothing (I know of) in ceramic caps to leak.

It wouldn't be surprising if the cap was hot-glued in place.

Do Ceramic Disc Caps Leak?
 

Depends what you mean by "leak".

No, I've never seen one that physically leaks any internal material or
chemical.

Yes, I've seen many that leak electrically, as in anywhere from a coupla
hundred k to short circuit.

Arfa

Do Ceramic Disc Caps Leak?
 

I'm pretty sure this is glue to keep the resistors in place. It is
darker because the resistors run quite hot.

Do Ceramic Disc Caps Leak?
 

On Sat, 27 Dec 2008 12:14:59 -0800 (PST), Jeroni Paul wrote:
I'm pretty sure this is glue to keep the resistors in place. It is
darker because the resistors run quite hot.

Just what are you nattering on about?

Oh, I see. A google gr00per.......

Do Ceramic Disc Caps Leak?
 

wrote:

I opened up a used Enermax EG351P-V computer power supply to inspect
before installing in a system. All the electrolytics looked good and
I believe the power supply is working fine (I've included no-load test
results). But near one of the heatsinks I found this:

http://img178.imageshack.us/my.php?image=powerkd2.jpg

A blue epoxy dipped disc capacitor was leaning up against one of two
standing power resistors that it is installed between. I pried it off
of the smaller resistor and you can kind of see where it was attached
(the clean spot on the smaller resistor). I chipped off some of the
brown gunk and it is very similar looking to other hot melt glue used
in the PS to glue down the larger electrolytics, but also appeared a
bit different, dirtier perhaps (maybe burnt?). You can also see what
could be a smear of this same brown glue on the larger resistor.

So, is it possible that the disc capacitor was purposefully hot glued
to a power resistor?

That's just glue, and some companies use a yellow kind that turns
brown and powdery in just a few months of use.