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Old 07-30-2010, 12:39 PM   #1
twistedbottlecap10
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Question Samsung 203b and f301 fuse replacement selection

Is this MCRW3A Fuse 125V 3A Fast Acting Wire-in-Air a suitable replacement?

Thanks!

(not sure what "wire-in-air" means )

Last edited by twistedbottlecap10; 07-30-2010 at 12:41 PM.. Reason: spelling
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Old 07-30-2010, 12:51 PM   #2
lucky13
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Default Re: Samsung 203b and f301 fuse replacement selection

Spec sheet shows it like a mini glass tube fuse but in a tiny ceramic package like a diode. Probably OK.

Is this to replace SMD of Pico fuse? What kind of fuse was the original?
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Old 07-30-2010, 02:01 PM   #3
twistedbottlecap10
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Default Re: Samsung 203b and f301 fuse replacement selection

It was the f301 pico fuse that I see referenced in other threads here(which led me to check it and it is definitely blown). It is green and has 3A and a symbol after it printed on the part.

Thanks for the reply.

Last edited by twistedbottlecap10; 07-30-2010 at 02:05 PM..
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Old 07-30-2010, 03:21 PM   #4
twistedbottlecap10
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Lightbulb Re: Samsung 203b and f301 fuse replacement selection

Here are some pics(replacing some caps too ):

Pics are being uploaded elsewhere....Please Wait.

203b PCB:


f301 fuse


Burned Shielding

Last edited by twistedbottlecap10; 07-30-2010 at 03:24 PM.. Reason: fixing pics
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Old 08-07-2010, 01:02 PM   #5
twistedbottlecap10
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Thumbs up Re: Samsung 203b and f301 fuse replacement selection

Monitor is working great after replacing the caps and fuse.

All the failed caps were Samwha's BTW.


New Caps used :

3-Panasonic FC 820uf 25V
1-Panasonic FC 330uf 25V
1-Panasonic FC 47uf 50V
1-Panasonic FC 10uf 50V

Fuse:

3A 125V Fast Acting(found a source for exact replacement).

Repaired board pic below.
Attached Images
File Type: jpg 203bnewcaps.jpg (504.1 KB, 86 views)

Last edited by twistedbottlecap10; 08-07-2010 at 01:11 PM.. Reason: extra info
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Old 09-26-2010, 11:46 PM   #6
MikeJones
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Default Re: Samsung 203b and f301 fuse replacement selection

I am repairing this same monitor, what was your source for the fuse?
thanks
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Old 10-07-2010, 04:46 PM   #7
MikeJones
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Default Re: Samsung 203b and f301 fuse replacement selection

disregard, found
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Old 06-07-2015, 11:38 AM   #8
GrahamLeach
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Default Re: Samsung 203b and f301 fuse replacement selection

Hello,

Same exact same problem for me:

BAD COMPONENTS:
==============
C301, C111, C112 caps near transformer all fullly vented and blown.
CapXon brand, 820mf @ 25V.

F301 Fuse blown.
LittleFuse 3A @ 125V, Fast Acting


REPLACEMENT COMPONENTS
=====================
Rubycon 1000mf @ 50V, 105C
Similar picofuse
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Old 02-15-2016, 08:54 AM   #9
Half-Saint
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Default Re: Samsung 203b and f301 fuse replacement selection

Hi guys,

don't feel like opening a whole new thread to repead the question hence the resurrection of an old thread.

I guess the question shows how little I actually understand but still, I need to know Was sold a Samsung 203B for 5€ and got replacement caps for about the same. It still doesn't work and F301 is blown (only found about this minutes ago).

The question is: should the fuse be 250V since I'm from Europe?
Looking at this: http://si.farnell.com/multicomp/mcpe...-3a/dp/1566012

Thanks
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Old 12-07-2016, 01:08 PM   #10
UpperKees
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Default Re: Samsung 203b and f301 fuse replacement selection

Just want to say thank you guys.

I replaced fuse F301 and a bad CapXon caps to fix my first 203B monitor.

My second one had bad backlighting which was not working intermittently. Replacing all caps fixed this one as well.

Thanks again for all the good info.
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Old 01-22-2018, 10:30 AM   #11
dutchie57
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Default Re: Samsung 203b and f301 fuse replacement selection

I want to replace the board but the marks from the connectors are gone , Who knows how the connections should be by this board.
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