Chimei CMV 946A caps

[CtrlAltELITE]

Hello

I have recently been experiancing power issues with my Chimei 19" CMV 946A. I diagnosed this problem as a capacitor issue (power light stays on, strange hissing / buzzing sound well running, blank screen) and after opening the case i seen the expected bulging caps and a little corrosion on one of the aluminium tops.

So i have decided to replace the whole set as they are CapXon which ive heard arnt very good and also im not 100% sure what one are broken and what ones arnt. The only problem is that i have no idea where to start in buying the new capacitors .

The caps i removed where:

CE101 - 220uF 25v
CE102 - 1000uF 10v
CE103 - 1000uF 25v
CE104 - 1000uF 25v
CEGiantSmudgeOfGlue - 2200uF 10v
CE109 - 220uF 25v

They are all Black with a grey stripe going up them. (see attatched images)

I would like a good brand name that would work as a replacement to these (i hear nichicon HE is good), but i dont know what particular models i should be looking for that would be compatable with eachother and my moniter. Any suggestions willl be apreciated.

Thanks
CtrlAltELITE

PS: Sorry for picture quality its only a 1megapixel camera.

[retiredcaps]

Re: Chimei CMV 946A caps

If you live in the USA, follow PlainBill's instructions to order Panasonic FM or FR caps. If FM or FR are out of stock, choose Panasonic FC as an alternative.

https://www.badcaps.net/forum/showpo...33&postcount=2

[CtrlAltELITE]

Re: Chimei CMV 946A caps

Sorry i forgot to mention that. I live in UK. Also that is for a different type of moniter

EDIT: Also the problem is im not sure what the

"Under Package/Case select Radial"
and
"Under Series select the series of caps you believe are acceptable."

is there anywhere where i can find out what cap series and package / case radial would be acceptable?

[seanc]

Re: Chimei CMV 946A caps

You may find RS Components to be cheaper for shipping.

[CtrlAltELITE]

Re: Chimei CMV 946A caps

yea its not sourcing the caps thats my problem. I dont know where to start when it comes to models and serieses etc. If someone could give me some examples of capacitors which would work as a replacment i can then go check RSComponants / UK version of PlainBills store.

[retiredcaps]

Re: Chimei CMV 946A caps

Check your diameter and height to make sure they fit.

1000uf 25V Panasonic FR

http://search.digikey.com/scripts/Dk...name=P14424-ND

220uF 25V Panasonic FM

http://search.digikey.com/scripts/Dk...name=P12383-ND

1000uF 10V Panasonic FR

http://search.digikey.com/scripts/Dk...name=P14378-ND

2200uF 10V Panasonic FR

http://search.digikey.com/scripts/Dk...name=P14382-ND

[Andeh]

Re: Chimei CMV 946A caps

if you're in the UK, go to http://www.esr.co.uk/components and click on the catalogue at the top right of the page. Go to page 10 and you'll find Radial Electrolytic capacitors (the green ones) Those are the ones I used to fix my monitor. flat £2.50 delivery charge, with no minimum order.

The 10v caps can be replaced with 16v ones.

[retiredcaps]

Re: Chimei CMV 946A caps

if you're in the UK, go to http://www.esr.co.uk/components and click on the catalogue at the top right of the page.

Those caps seem to be no name and not low ESR caps. The power board requires low ESR caps like the Panasonic FM or FR caps.

[Rtech]

Re: Chimei CMV 946A caps

The caps advised by Andeh,have been used by myself for over 3 years with no returns or failures,and would certainly do a job for you,at a very economical cost.
Farnell will have the Panasonic caps, but unlike the States,there is a minimal order value of £20 + Vat.RS will also have them,but again a very small order, which you require, will not be Vat free,nor P&P free.Digikey which seems brilliant for the USA users,has a P&P charge in the UK of £12.50 irrespective of value or quantity.
Dimensions also have not caused a problem,in any Monitor I have used them in,and thats a total of 89 monitors from 2Sept to yesterday,and ESR on all of these has been less than 0.05 ohms on my ESR meter,ripple has not caused any problems,but of course the choice is yours.

[CtrlAltELITE]

Re: Chimei CMV 946A caps

Ok guys. Andeh no offence i wanna make sure i get some good quality caps. Gone with a mixture of Rubycon and Panasonic. Wanna make sure this will work as they are all not of the same brand (the rubycon ones seem to have a longer MTBF and i couldnt source the whole set of panasonics)

http://shop.mikecartwright.net/1000u...citor-rubycon/ x2
http://shop.mikecartwright.net/220uf...citor-rubycon/ x2
http://shop.mikecartwright.net/2200u...nic-fr-series/
http://shop.mikecartwright.net/1000u...nic-fr-series/

So the mixxed caps will work right? Ive measured and im sure they will all fit in.

[seanc]

Re: Chimei CMV 946A caps

1. Never heard of that site.
2. Can't be sure the capacitors are genuine.
3. Those prices are extortionate. RS will sell you caps in bags of 5 for ~49p a cap if you were buying Panasonic FR.

[CtrlAltELITE]

Re: Chimei CMV 946A caps

Temporarily out of stock - back order for despatch 22/04/2011

This is why im not using RS

[seanc]

Re: Chimei CMV 946A caps

Even Farnell is out of stock! What the hell?!

How much room have you got for extra height?

[CtrlAltELITE]

Re: Chimei CMV 946A caps

a few centimeters... it is a pretty large moniter case. The diameter is pretty tight though. Was looking at a mixxed series of Nichicon's though that i could pick up. Reletivly low lifetime compared to panasonics though but they are in stock... and they have a lower ripple current... which would be nice if i knew what that did

[retiredcaps]

Re: Chimei CMV 946A caps

So the mixxed caps will work right? Ive measured and im sure they will all fit in.

Rubycon ZLJ is not on the list of low ESR caps as per

https://www.badcaps.net/forum/showthread.php?t=2280

I would stick with Panasonic FR or FM.

PS. Everyone will have their own opinions on what caps to use. There is no "right" answer. Many people on this forum use Panasonic with no problems. I tend to use Rubycon MCZ.

[CtrlAltELITE]

Re: Chimei CMV 946A caps

Ah ok i double checked that list... got a bunch of caps in stock on RS componants mostly Nichicon PW and PM and 1 Panasonic FC. Ordering it now thanks for the help guys.

[NobbyJones]

Re: Chimei CMV 946A caps

Hi All,

After reading through the information here I have replaced the 6 caps as discussed and the monitor is now working... almost perfectly.

I replaced 4 of the 6 caps with Panasonic FR's however RS dont stock the 220uF in this range so replaced these with the FC.

The monitor now powers up and the annoying hissing has stopped, however when first switched on the image flickers quite badly then slowly fades out and stops after 10-15 seconds.

Its obviously a cap problem but why? Because I used two odd caps perhaps? Its not a major problem as im only using the LCD for diagnostic purposes, but would be nice to know what could be causing the problem for future reference...

Thanks in advance.

[PlainBill]

Re: Chimei CMV 946A caps

Which 6 caps? I count 7, and there are at least 2 more that are not visible in the very bad pictures. (That was a hint to provide a good picture of the power supply.)

PlainBill

[NobbyJones]

Re: Chimei CMV 946A caps

The 6 which are listed in the first post. These are the vertically mounted ones shown in the picture.

There are 2 other caps on the board, the horizontally mounted redish coloured one which is visible in the picture, and the large one on the high voltage side of the board.

[alexanna]

Re: Chimei CMV 946A caps

There are 2 more capacitors you did not list,Going from memory they are a 50v 47UF and 50v 22UF these are very small capacitors around 4mm in diameter.
You really need to provide some better focused pictures of the entire board.
If the number of your power supply is DAC-19m005 there are numerous threads on it.