Back light problem

[vinceroger69]

Re: Back light problem




!!! dont down load wrong schme !!!

[snipersquad100]

Re: Back light problem

Thank you vince

[snipersquad100]

Re: Back light problem

That's the same one lol 10-2

[vinceroger69]

Re: Back light problem

this is from another thread
I've seen a few small screen sets with duff backlights. I'm pretty sure it's dry connections . I've just changed c230/231 5pf 6kv caps it appears to be fine. I wish I'd examined them under a magnifying glass for dry joints before I removed the old ones as I can't see anything wrong with them. Unless they are breaking down under load might be worth a check/replace just in case.

it looked correct lol

[snipersquad100]

Re: Back light problem

Funny you should say that cos ive noticed those two caps have been changed
b4 by someone, the soldering is not the best. I will reflow them now see if it fixes it or see if maplin got any tomorrow.

[snipersquad100]

Re: Back light problem

you didn't pay for that schematic did you?

[vinceroger69]

Re: Back light problem

no there free two downloads a day a verygood site imo.
tom66 site has good schematics as well all free or can donate to his site.

[snipersquad100]

Re: Back light problem

Whats toms site?
I reflowed those caps but still the same. I get new ones tomorrow or order some.
im off to bed now.
Thank you.

[vinceroger69]

Re: Back light problem

http://www.toms-service-manuals.com/
tom66 member whos helped you on page one

[snipersquad100]

Re: Back light problem

Cant get those two caps in Maplins, it must be such a high technical component for them to stock lol
I'll have to order them.

[Manddave]

Re: Back light problem

Hi just thought I would let you know that I repaired one of these recently.
It had the backlight problem. I replaced the two 3kv caps shown here
Hope this helps

[newtothis]

Re: Back light problem

Cant get those two caps in Maplins, it must be such a high technical component for them to stock lol
I'll have to order them.

Maplins.... no No NO NO NO! LOL

Maplins caps are no good. They are general purpose. You need good low ESR caps

[snipersquad100]

Re: Back light problem

yes maplins is s**t but cant think of anywhere else in the uk to buy electronic components other than online.
Thanks Manndave

[tom66]

Re: Back light problem

cpc.farnell.com have free delivery from £0.01 and stock Panasonic capacitors.
Maplin capacitors are often worse than originals.

[snipersquad100]

Re: Back light problem

Can I use 80pf cap instead of the 5pf.
Tom that cap you asked me to measure was unpopulated.

[selldoor]

Re: Back light problem

When cpc dont have the offer there is also rs components in pontypridd.
and various other places round the uk. Also I mention because I think it has been there forever and I like the name Cricklewood electronics. In Cricklewood
but post is reasonable IF they have what you need - not great stock or maybe just hard to find.

[vinceroger69]

Re: Back light problem

Can I use 80pf cap instead of the 5pf.
Tom that cap you asked me to measure was unpopulated.

i would keep it at 5pf if possible.

[snipersquad100]

Re: Back light problem

ok joined cpc and ordered the 5pf 3kv caps

[vinceroger69]

Re: Back light problem

cpc a very good site imo good prices takes about 2 days to get to you. i thought they was 5pf 6kv have you checked what your old caps say?

[snipersquad100]

Re: Back light problem

o shit I ordered 3k, the voltage don't go over 3k does it?