Capacitor identification ...

[minzouk]

Hi specialistS,
I'm new here.I'm a musician (damn!).But I'm about to try repair my living room monitor and I need a real PRO advice.

I have the infamous "my display won't turn on issue".It happened in the past with another monitor.I was able to fix it myself changing a faulty capacitor (a challenge for simple music maker)

I did my research reading posts,trying to educate myself.I attached what I think is the issue this time.(a burned capacitor/transistor not sure which one so I'm bout to change both).

I attached some pictures.I think I was able to identify the transistor a C5707 http://www.mouser.com/ProductDetail/...nJU2aai%252beQ

I think I found the cap.too a : Film Capacitors .22UF 160V 10% BUT I want to be sure and check with PRO before I order it.

Thanks a lot for any advice.

Also any other advice on the cause or the problem itself is welcome.

[minzouk]

Re: Capacitor identification ...

Oh and if you can give me a RELIABLE online vendor man,it would be heaven on earth!

EDIT : They seems to be obsolete and hard to find without buying 100 pieces... Just found that.http://www.ttiinc.com/page/search_re...MKP1840+Vishay

But boy I'm lost...that definitely not my world...

[Rtech]

Re: Capacitor identification ...

Its a standard fault with these boards.You need to change all 4 of the 2sc5707,the capacitor value you have also got right as well.The transistors may well be found on Ebay in smaller quantities.On fitting them you must ensure they go in the correct orientation, also you need to resolder all of the 4 yellow transformers,as they were probably the cause of the fault, due to a dry joint.

[minzouk]

Re: Capacitor identification ...

Thanks Rtech for the detailed answer.

The transistors may well be found on Ebay in smaller quantities
I think I found them on mouser (link above) seems that I can buy them by the piece.
My problem is more for the capacitors.

also you need to resolder all of the 4 yellow transformers,as they were probably the cause of the fault, due to a dry joint.
Wow,now we gonna reach my soldering skills limit (that's a lot of joints for me!).

Do you have the references for those yellow transformer Rtech ? It would be really appriaciated.

Thanks for the soldering advice too.

Vendor ?

EDIT : I dind't read you right you said RE-solder.

[selldoor]

Re: Capacitor identification ...

Hi - think you are correct have a look at these:
http://uk.mouser.com/ProductDetail/K...nRlr%2fQ%3d%3d

By the way it is usual to replace all the 5707s as they usually work in pairs and both caps or all four if there are four.
Detail of the monitor or the full board would help.

[minzouk]

Re: Capacitor identification ...

Thanks for the knowledge selldoor.
You're right about the model info.

Here :
- the board seems to be a BenQ J18 or CQC ETL 8011.6MM or GCI1V0 SZ (I don't really know what makes sence to you here).
- the monitor is a old Dell 17" model E173 FPb

Is a picture from the top of the board might be useful ?

[minzouk]

Re: Capacitor identification ...

selldoor do I read it right on the mouser link you gave me.The delivery time is 11 weeks ?!?
Can I just buy 2 of them at mouser (caps) ? or they gonna laugh at me ?

A pic of the board from the top in case you guys think of any warning/advice before I start...

[selldoor]

Re: Capacitor identification ...

Hi - sorry didnt notice the stock date, Yes you can buy 2 - I have never used them
so I dont know if they have a minimum order value or what the postage is.
This looks like a good sub
http://uk.mouser.com/Search/ProductD...Cn7NBVyg%3d%3d
You will need to measure the one you have (physical size) gap between legs and see if it is similar.

As Rtech says this is a Benq board and you will need to reflow as many joints as you can.
Some people remove as much old solder as they can, then resolder. Some introduce a little new solder to make it melt/flow a little easier.

[minzouk]

Re: Capacitor identification ...

Thanks selldoor,precious informations.

I definitely need to do it before 11 weeks.My wife use it for work.

Does anyone know a reliable company.Where I can get them...and faster ?

That's a lot of question I know...

[budm]

Re: Capacitor identification ...

I get 2sc5707 from EBAY, such as these:
http://compare.ebay.com/like/1605994..._lwgsi=y&cbt=y

[minzouk]

Re: Capacitor identification ...

Thanks a lot budm.

Don't hesitate to add more in my basket guys.

[budm]

Re: Capacitor identification ...

I also use this place:
http://www.audiolabga.com/

[minzouk]

Re: Capacitor identification ...

Thanks man.Really appreciated.

[minzouk]

Re: Capacitor identification ...

Technical question :
Can I replace a 10% capacitor (K) by a 5% ?

Risks ?

I really struggling to find replacement ones.

When I find one,it either 500 pieces min,12 weeks to wait not in stock,or a different tolerance.

No problem for the C5707 ...

I still searching.In the meantime any contribution's welcome.Tanks.

EDIT : Strangly.For the same model (same manufacturer number,some web sites tag it as 5% others +-10% ?!?)

[tibimakai]

Re: Capacitor identification ...

That means that the value is much closer to the marked value on the capacitor, which is better. A 1% would be even better.
Example: 100uF +/_ 5%= could be from 95uf to 105uF.

[selldoor]

Re: Capacitor identification ...

Technical question :
Can I replace a 10% capacitor (K) by a 5% ?

Risks ?

Yes you can - a 5% should be better than 10%
None that I am aware of - it is certainly better than going from 5% to 10%

Did you do the physical measurement and leg distance? - I am sure Mouser will have something that will fit? with fast delivery. Are you still getting the 5707s from them?

[Rtech]

Re: Capacitor identification ...

Normally a lot of these caps, in this sort of circuit are marked with a 'J', this means 5%,However as your Board is fitted with 'K' 10%, then the 5% ones will be fine.

[minzouk]

Re: Capacitor identification ...

Thanks all.

Are you still getting the 5707s from them?
My goal was to have caps. and trans. ship from the same place.Just to synchronize time.So I kept the 5707s mouser link in case one of you point me to a replacement model for the Capacitor.I'm rookie + a noob so I ain't got no problem ordering parts anywhere.As soon as you, who are knowledgeable, tell me it's risk free.i.e : they'll not use my credit cart number to play with ...


Did you do the physical measurement and leg distance?

Not yet.I will.(still looking from my damn solder pump).I tought that the "tolerance" wasn't related to the physical aspect of the cap.

To sum up : I can use a cap. labeled J or 5%.Which is just literally "the tolerance" to the uF value.Plus, I'll have to make sure by physically measure it that it will fit with holes on the board.Am I right ?

Note : sorry for the delay.As I told you I have music to make at the same time to feed the kids.

[minzouk]

Re: Capacitor identification ...

OK with for 5%/Js the selection is definitely larger.I'm gonna measure it as you told me selldoor and go for it.

Thanks guys.

Any other advices as what to watch out during soldering or pitfall with the board etc,are always welcome ..."knowledge seeker"

[minzouk]

Re: Capacitor identification ...

That may be my last question for this issue :
High Pulse or General Purpose, DC . ?

@ selldoor : I'll get everything from mouser