Matsui M32LW409 no picture but sound

[Andyd1970]

Re: Matsui M32LW409 no picture but sound

Hi, Can some one help me please with the orientation of this capacitor I need to replace on the Tcon PCB.

Thank you

[Andyd1970]

Re: Matsui M32LW409 no picture but sound

Hi Tom,

OK i will use the new ones, I did buy 16v and 25v, the new caps you say are tantalums and I have be careful with polarity I see they have a band one end so I guess that is the + end, but how do I know which pad on the Tcon to solder the + terminal to? I am going to replace CP3 with one of the tantalum caps as there is room to solder it with wires.

Thank you

[tom66]

Re: Matsui M32LW409 no picture but sound

For the caps, you could solder some leads to them, or mount them diagonally along the board.
I would never reuse electrolytic capacitors from an old power supply due to the principle of voltage forming, it can lead to early failure.

[Andyd1970]

Re: Matsui M32LW409 no picture but sound

Hi,The fuse and caps arrived, the fuse is alot smaller but I should be able to solder it in, the caps are way to big, I have an old PSU that I have removed some caps from the original one measured out of circuit with an ESR meter is 18.94uf. The ones from the old PSU are 11.62uf measured out of circuit. Will that be OK or do I need closer value.

Thank you

[Andyd1970]

Re: Matsui M32LW409 no picture but sound

Hi Tom,

Or am I going over kill with the Cap? I have one that I will reuse for CP1, so just need one more do I need 10v or 25v ? If you can help with the fitting advice great if not can you recommend another one from CPC?

[Andyd1970]

Re: Matsui M32LW409 no picture but sound

Hi Tom,

Glad I posted that, or can you recommend a more appropriate capacitor from CPC ASAP so I can add to my order? Or how will I tell which way to fit them and which pad on the TCON is the positive or negative.

Help

[tom66]

Re: Matsui M32LW409 no picture but sound

They are tantalums. They will work but you will need to be absolutely sure to get the polarity correct (if wrong they will usually violently burn.) You may need to bend the leads to meet the pads.

[Andyd1970]

Re: Matsui M32LW409 no picture but sound

Hi Guys,

Order the 4amp fuse better to be safe than it blow again

Capacitors I ordered the following, hope that are OK? I take it I should fit the 35v one and not the 16v one??

http://cpc.farnell.com/kemet/b45196e...-bb45-00001003

http://cpc.farnell.com/kemet/b45196h...-bb45-00001003

If you could confirm that would be great and I will let you know once they arrive and I fit them.

Thank you

[Andyd1970]

Re: Matsui M32LW409 no picture but sound

Thank you so much guys for all your help, sorry to be a pain but can you send link to the correct capacitor as they asked all kinds of questions about the spec I needed.

Thank you

[tom66]

Re: Matsui M32LW409 no picture but sound

It's being pedantic. Fuse failure rate is proportional to the square of the current. If you wish, they stock 4A fuses... it's generally bad practice to increase a fuse rating but I don't see harm being a likely outcome in this case.

[Th3_uN1Qu3]

Re: Matsui M32LW409 no picture but sound

The original fuse is 3.15A. A 3 amp fuse might blow for no reason after a number of power cycles. Sure, it's not that big of a difference, but it's better not having to pull the set apart again.

[tom66]

Re: Matsui M32LW409 no picture but sound

Fuses
http://cpc.farnell.com/multicomp/mc0...-3a/dp/FF02260

[Andyd1970]

Re: Matsui M32LW409 no picture but sound

Sorry to be a pain but just spoke to CPC who said they do not do the fuses would you be kind enough to send me the item number/link so I can order them, also the same with the caps as they said they have soo many to offer.

Thank you in advance.

Andy

[Th3_uN1Qu3]

Re: Matsui M32LW409 no picture but sound

22uF is the standard size and that is what you should order. Some may measure higher or lower, generally higher. Regular capacitor tolerance is -20%/+80%.

[Andyd1970]

Re: Matsui M32LW409 no picture but sound

Hi Guys, I have just used my meter which has a setting for capacitors and it indicated 23.3uf. So do I go for 23uf or 24uf?

[tom66]

Re: Matsui M32LW409 no picture but sound

CPC sell packs of 10 for about £3 inc VAT. Min order £5 via card, free delivery, so throw a reel of Chemtronics solder wick on there (£2.50 inc VAT.)

[Th3_uN1Qu3]

Re: Matsui M32LW409 no picture but sound

But where do I get those surface mount fuses? and what rating?

I have already mentioned, the rating of the original fuse is 3.15A. You can find them at any reputable supplier, like Farnell, Digikey and so on. You can also try ebay.

[tom66]

Re: Matsui M32LW409 no picture but sound

Do you not have a capacitance meter available, or a capacitance range on your multimeter?

[Andyd1970]

Re: Matsui M32LW409 no picture but sound

Thank you,

But where do I get those surface mount fuses? and what rating?

[Th3_uN1Qu3]

Re: Matsui M32LW409 no picture but sound

CP3 can be pulled from dead laptop boards or similar, check the ones near the input dc jack or near the battery connector. Any of those will work. For the exact value you can use a capacitance meter. As a guess, it should be 10uF 25v or 22uF 25v.

For that type of fuse, the fuse's rating is printed on it as a code. The code "UD" solves to 3.15A. See here: https://cdn.badcaps-static.com/pdfs/...7263e74802.pdf. It seems to be SMD 0603 size.