IcePower 200ASC amp module

[Hugo]

responding to
http://www.electrondepot.com/repair/icepower-200asc-amp-module-165648-.htm ,
Hugo wrote:

javielectronicamateos wrote:

El jueves, 21 de julio de 2016, 20:31:31 (UTC+2), Gareth Magennis
escribi

Hi,

can't find any schematics for this module - its a Bang &
Olufsun combined

SMPS/Class D audio amp PCB.

The one I have has the exact same fault as this one:
http://forum.recordere.dk/uploads/36113/icepower3.jpg


Blown cap (presumably), but no way of finding out what it was.
There are other photos on the Interweb of this board which show the
unmar
ked
device not blown up.

There's about 330v DC across the remains, and my amp module still
works

without it.



This is in a powered Studio Monitor Sub, seems these modules are
reasonab
ly
popular in this kind of thing - B&O would not sell these to the
public,

though I read on a forum while Googling today that they might now,
but ar
e
prohibitively expensive.


Any smart guesses what I should be putting in there? One end goes
to the

three paralleled resistors which are very low ohmage and I guess
current

sense at ground, the other goes to the first pin of the transformer
which
is
at high HT.


Cheers,


Gareth.

Hola, el condensador es de 2,2pf 2kv y poner un fusible de 3,15a y a
funcio
nar.

Hi and thanks for info. I've been looking at this on and off for a long time!
With my very limited but growing (mostly iPhone and Mac logic board)
electronics knowledge I'm still rather unsure of what to do to fix the amp.

So avoid SMD - Use something like a single layer ceramic through hole?
600v to 2kv from looking through the thread
2.2pf or whatever pf can fit for component size?
A fuse 3.15amp so the cap doesn't keep blowing or maybe the 3 resistors in
series after the cap... - something leaded and I'm lost on voltage here, 250v?

perhaps this cap -
http://au.rs-online.com/web/p/ceramic-single-layer-capacitors/8312929/
with this fuse -
http://au.rs-online.com/web/p/non-resettable-wire-ended-fuses/8951678/

Any help would be super appreciated, I'm in dire need of BASS!!!

 

[Hugo]

responding to
http://www.electrondepot.com/repair/icepower-200asc-amp-module-165648-.htm ,
Hugo wrote:
Thanks for all the puzzle pieces folks, the bottom octave is back!!

High voltage cap, fuse in the right place.. all good!

Really appreciate the assistance ?

Hugo wrote:

responding to
http://www.electrondepot.com/repair/icepower-200asc-amp-module-165648-.htm
,
Hugo wrote:
javielectronicamateos wrote:

El jueves, 21 de julio de 2016, 20:31:31 (UTC+2), Gareth Magennis
escribi

Hi,

can't find any schematics for this module - its a Bang &
Olufsun combined

SMPS/Class D audio amp PCB.

The one I have has the exact same fault as this one:
http://forum.recordere.dk/uploads/36113/icepower3.jpg


Blown cap (presumably), but no way of finding out what it was.

There are other photos on the Interweb of this board which
show the
unmar
ked
device not blown up.

There's about 330v DC across the remains, and my amp module
still
works

without it.



This is in a powered Studio Monitor Sub, seems these modules
are
reasonab
ly
popular in this kind of thing - B&O would not sell these
to the
public,

though I read on a forum while Googling today that they might
now,
but ar
e
prohibitively expensive.


Any smart guesses what I should be putting in there? One end
goes
to the

three paralleled resistors which are very low ohmage and I
guess
current

sense at ground, the other goes to the first pin of the
transformer
which
is
at high HT.


Cheers,


Gareth.

Hola, el condensador es de 2,2pf 2kv y poner un fusible de 3,15a y
a
funcio
nar.

Hi and thanks for info. I've been looking at this on and off for a long
time!
With my very limited but growing (mostly iPhone and Mac logic board)
electronics
knowledge I'm still rather unsure of what to do to fix the amp.

So avoid SMD - Use something like a single layer ceramic through hole?
600v to 2kv from looking through the thread
2.2pf or whatever pf can fit for component size?
A fuse 3.15amp so the cap doesn't keep blowing or maybe the 3 resistors
in
series after the cap... - something leaded and I'm lost on voltage here,
250v?

perhaps this cap -
http://au.rs-online.com/web/p/ceramic-single-layer-capacitors/8312929/
with this fuse -
http://au.rs-online.com/web/p/non-resettable-wire-ended-fuses/8951678/

Any help would be super appreciated, I'm in dire need of BASS!!!

 

So bro can you let us know how did u fixed the unit, I have the same issue on the same module. Does 2.2PF 2kv SMD CAP really exist? I can only find the 50v type.

 

On Tuesday, August 28, 2018 at 10:58:14 AM UTC-4, mat...@gmail.com wrote:
> So bro can you let us know how did u fixed the unit, I have the same issue on the same module. Does 2.2PF 2kv SMD CAP really exist? I can only find the 50v type.

I think the OP said he used a leaded cap for the replacement.
I don't know where the 2.2pF value came from but that seems too small to do anything useful in that circuit.

I'd put in a 1000 pf 1000V leaded cap and call it a day.

mark

 

>"I'd put in a 1000 pf 1000V leaded cap and call it a day. "

Depends on where it is in the circuit, a whole nF ? That is alot at some frequencies.

 

[pit]

responding to
http://www.electrondepot.com/repair/icepower-200asc-amp-module-165648-.htm ,
pit wrote:
I repaired my amp with a 1000PF 1KV ceramic cap. Like Gareth, my main fuse
was blown and I also had to replace it.

jurb6006 wrote:

"I'd put in a 1000 pf 1000V leaded cap and call it a day.
"

Depends on where it is in the circuit, a whole nF ? That is alot at some
frequencies.