Oh ok thats interesting to know! i'll keep my eye on it then. Thanks
NobbyJones
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Last Activity: 08-19-2011, 09:26 AM
Joined: 08-17-2011
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Re: Chimei CMV 946A caps
Oh ok thats interesting to know! i'll keep my eye on it then. Thanks
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Re: Chimei CMV 946A caps
Already tried that and no change.
Oh well I think ill just accept the fact that it flickers for the first 20 seconds, its not a major problem!
Thanks for all your help guys its much appriciated.Leave a comment:
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Re: Chimei CMV 946A caps
Both, I couldnt say for sure if the external/spare ccfl flickers or not.Leave a comment:
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Re: Chimei CMV 946A caps
No I inherited it a few days ago
All of the caps have now been replaced (appart from the 450v) with Panasonic FC or FR.
Ive tried disconnecting all the CCFL's one at a time on the offchance that one of them was bad, still flickering. I have tried with a CCFL out of another panel and it seems ok but hard to tell whether its flickering or not realy.
I have found a repair kit for these boards on ebay and they include all the caps, 2 inverter mosfets and a replacement fuse. Its obviously not the fuse else it wouldnt...Leave a comment:
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Re: Chimei CMV 946A caps
Right, I've replaced the 3 remaining caps like for like and the flickering is there there.
You say you havnt seen a 470uF cap on this board before? Would it be worthwhile trying a 220uF? There was no evidence that it had been replaced no.Leave a comment:
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Re: Chimei CMV 946A caps
CapXon, so yea I think i'll replace the other 3 that i havnt already
Leave a comment:
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Re: Chimei CMV 946A caps
Managed to bend the purple cap up enough to read... its a 470uF 25vLeave a comment:
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Re: Chimei CMV 946A caps
Right ive attempted a picture of the board using my phone...
The caps circled in red are the ones I have replaced.
The green, Yellow and Purple ones I have not touched, green is 47uF 50v, cant see what the other two are without getting them out.
When I said the flickering fades out, I meant it gradually gets better over the space of about 15 seconds then stops and is fine, i.e. no flickering - the screen does not go black and none of the backlights go out completely. Sorry if i didnt make that very clear before...Leave a comment:
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Re: Chimei CMV 946A caps
Next to the 6 I have replaced there is a horizontally mounted cap (see pic in first post), there is also a very large cap near to the mains socket. I havnt touched either of these.Leave a comment:
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Re: Chimei CMV 946A caps
Yes have found some more pictures of the board now and you are right, there are 2 small caps in the centre. Im fairly new to this and at the risk of sounding useless... are these other caps of a different type as they arent the same as the 6 i have replaced (red-ish coloured) or are they just a different brand?
Unfortunately I am unable to take any better pictures at the moment as my camera has been taken on holiday 8-)
Thanks.Leave a comment:
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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.Leave a comment:
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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...Last edited by NobbyJones; 08-17-2011, 07:37 AM.Leave a comment:
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