Which caps to replace on Samsung 205B?

[juu]

My Samsung 205B monitor was dying for a long while, not turning on properly and requiring multiple tries. Now it stopped working altogether, just flashing the power light quickly. I'm pretty sure that's a caps problem.

But which ones do I replace?

I took a picture of them and some seem to have brown crap on the top, but others are just bulging very slightly.

Am I supposed to replace them all then? Is it a matter of time they will all fail?

A friend will help to do the soldering, but our experience isn't that great on this so I'd like to avoid changing them all if it can be avoided.

Photo here:
http://flickr.com/gp/27644687@N06/292892

Megasize image link:
http://farm5.static.flickr.com/4143/...ccc601ca_o.jpg

[kc8adu]

Re: Which caps to replace on Samsung 205B?

yes replace all.it will likely work.moving to displays....

[jetadm123]

Re: Which caps to replace on Samsung 205B?

My Samsung 205B monitor was dying for a long while, not turning on properly and requiring multiple tries. Now it stopped working altogether, just flashing the power light quickly. I'm pretty sure that's a caps problem.

But which ones do I replace?

I took a picture of them and some seem to have brown crap on the top, but others are just bulging very slightly.

Am I supposed to replace them all then? Is it a matter of time they will all fail?

A friend will help to do the soldering, but our experience isn't that great on this so I'd like to avoid changing them all if it can be avoided.

One BIG mistake that people make is that they wait until the monitor dies before they do anything. The hint in your case was that it was not turning on properly. By allowing the problem to continue, you're allowing poorly filtered DC voltage to reach other components, which in turn causes them to overheat and possibly short out, thus making an initially cheap repair turn into a time consuming and more expensive one.

Do what was suggested by kc8adu and replace ALL caps except for the large one lying on it's side.

[Toasty]

Re: Which caps to replace on Samsung 205B?

>>A friend will help to do the soldering, but our experience isn't that great on this so I'd like to avoid changing them all if it can be avoided.<<

You're looking at less than $10 worth of caps including shipping. Replace them all as kc8adu said. The big one in the middle isn't a likely fail, but -ALL- the others need to go.

Guidance can be found here from multiple sources if you need assistance. Just ask.

Welcome to the forums!

Toast

[jetadm123]

Re: Which caps to replace on Samsung 205B?

If your next question is what caps to order and where to puchase, a lot of members will suggest Panasonic FM or FC sreies caps from digikey.com. Total cost should be under $10 (including shipping). My writeup below should help you select the proper caps:

Here's the best way to order from digikey:

1) Go to digikey.com

2) In the "parts search" window type: panasonic fm and select the "GO" button

3) Under the Capacitor heading select "Aluminum"

4) The first two columns you see are capacitance and voltage. Highlight the value and voltage with your mouse and select the "Apply Filters" button

5) You'll see several selections available. Here's what to look for:


a) Look at the quantity available and minimum purchase. If "0" are available, then there's none to purchase. Some selections require a minumum purchase of a 1000 units, which you also don't want. I think you get the picture.

b) height and diameter. Measure the original caps and compare to what's listed.


6) If your value is out of stock, go back to the beginning and type in "panasonic fc" and go through the same process.

7) During the checkout process select USPS First Class shipping, since this will give the best ship rate.

[juu]

Re: Which caps to replace on Samsung 205B?

Thanks, everyone!

I actually already ordered these:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=320457819939

Should I not use them and order Panasonic caps instead?

[jetadm123]

Re: Which caps to replace on Samsung 205B?

Thanks, everyone!

I actually already ordered these:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=320457819939

Should I not use them and order Panasonic caps instead?

Actually, those are very good brands that are listed. However, I did not see your model in the listing. Please verify that the value of the caps in the listing are the same ones that are on your board. Also, I don't see a replacement for C107.

[juu]

Re: Which caps to replace on Samsung 205B?

Where do you see the brands listed? The "nichicon" on the caps in the image?

I misspelled the monitor model . It really is 204B, sorry about the confusion. And I checked the voltages and capacities and these are the right ones for the 5 caps out of 6.

But, like you noticed, I'm missing the C107, somehow it's not part of the "kit". It's not bulging either (only one which isn't), but I think I can just get it separately.

[jetadm123]

Re: Which caps to replace on Samsung 205B?

Where do you see the brands listed? The "nichicon" on the caps in the image?

I misspelled the monitor model . It really is 204B, sorry about the confusion. And I checked the voltages and capacities and these are the right ones for the 5 caps out of 6.

But I'm missing the C107, somehow it's not part of the "kit". It's not bulging either (only one which isn't), but I think I can just get it separately.

Yes, I was reading Nichicon off the Ebay image. It's a very reliable brand. Looks like you're good to go! Good luck and please let us know the outcome. Also, just because a cap isn't bulging, it doesn't mean it's not bad. The small cap is actually part of the startup circuit.

[juu]

Re: Which caps to replace on Samsung 205B?

Thanks! It will take a while for them to arrive from the USA though, I presume; but I will let you know if it works in the end or not.

[PCBONEZ]

Re: Which caps to replace on Samsung 205B?

Thanks, everyone!

I actually already ordered these:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=320457819939

Should I not use them and order Panasonic caps instead?

He doesn't say what series of cap they are so it's hard to say.
Caps have series' [like different models] and the specs vary.

If that guy knows his caps you should be alright with the kit except there are only 5 caps in the kit and I see at least 6 that should go in your photo.

.

[Wrog]

Re: Which caps to replace on Samsung 205B?

But, like you noticed, I'm missing the C107, somehow it's not part of the "kit". It's not bulging either (only one which isn't), but I think I can just get it separately.

You will definitely want to replace C107, it may be the most important one of all (part of the start-up circuit). If you put a location in your profile, someone may be able to suggest a place closer to get them quicker.

[PCBONEZ]

Re: Which caps to replace on Samsung 205B?

What is make, series, uF, volts, and diameter of C107?

[juu]

Re: Which caps to replace on Samsung 205B?

I live in the United Kingdom (not far off London, but I don't generally commute there). What is the best UK place to by caps from online?

The C107 is CapXon 47uF/50V 6mm diameter. Not sure about series, it says GL... C640 VENT on it.

The big one (C105) is 100uF 450V CapXon 18mm diameter - I just read that some people don't trust CapXon and replace that too.

[Wrog]

Re: Which caps to replace on Samsung 205B?

I live in the United Kingdom (not far off London, but I don't generally commute there). What is the best UK place to by caps from online?

The C107 is CapXon 47uF/50V 6mm diameter. Not sure about series, it says GL... C640 VENT on it.

The big one (C105) is 100uF 450V CapXon 18mm diameter - I just read that some people don't trust CapXon and replace that too.

Attached CapXon GL series specs. Interestingly, it says that the 47uF 50V cap is 8mm diameter. Someone recently said that Farnell is their choice for UK cap purchases. Also, the 450V cap doesn't usually need to be replaced unless it is obviously bad (bulging, leaking, etc).

[PCBONEZ]

Re: Which caps to replace on Samsung 205B?

I think 8mm is probably a typo but CapXon is quite liberal about custom sizes for large orders, so who knows..

Anyway.
Looking at the GL sheet I'd say find a 47uF with at least 300 mA for Ripple.
Panny FC isn't good enough but Nichicon PW is spot on.
https://cdn.badcaps-static.com/pdfs/...f05f5c7af5.pdf
http://parts.digikey.com/1/parts/426...w1h470med.html
http://www.mouser.com/ProductDetail/...on/UPW1H470MED

.

[PCBONEZ]

Re: Which caps to replace on Samsung 205B?

Oops, sorry, UK...
Farnell carries them but no stock....
http://uk.farnell.com/nichicon/upw1h...ial/dp/1818643

This will work as an alternate and they have some [it's 63v and 8mm]
http://uk.farnell.com/nichicon/upm1j...63v/dp/8812659
https://cdn.badcaps-static.com/pdfs/...bd6be53026.pdf

.

[juu]

Re: Which caps to replace on Samsung 205B?

It looks like Farnell only allows paying by debit card starting from GBP 20 . That's a lot of caps.

[Wrog]

Re: Which caps to replace on Samsung 205B?

On another thread, someone mentioned that Radio Spares doesn't charge a ton for shipping... try ordering from there:

Nichicon UPM 47uF 63V

It does look like the minimum order is QTY 5 though.

[juu]

Re: Which caps to replace on Samsung 205B?

Thanks for all your help!

My friend changed the caps and monitor now works fine - even brighter than before. I hope that lasts.

We didn't change the big one, but replaced the rest - I bought the C107 as a 100V 47uF Jamicon from Maplin; the rest were Nichicons I got online but I forgot to check which series.