usp440m-42lp psu

[joehezzer]

Hi all does anybody have any experience with the said psu, picked up a 42inch plasma the other day, the psu has no power and am struggling to find a replacement cheers

[joehezzer]

Re: usp440m-42lp psu

anybody know of anywhere i could get one or is interested in trading !!!

[Alastair E]

Re: usp440m-42lp psu

What tests have you done on it?

Stby 5v present?

Have you tried turning the PSU on by sending the PS-On, Vs-On, etc to it?

What set? PSU may well be fine--could be a Set fault and nothing to do with the PSU at all!

[joehezzer]

Re: usp440m-42lp psu

i have checked the voltage on the points marked in yellow, nothing at all no standby light nothing. i have done a minimal amount of checks as i was just going to replace psu. there is a big blue block (relay i think ) found a post somewhere saying it might be that, its a bush 42" PLASMA, i do not have model number as of yet

[tom66]

Re: usp440m-42lp psu

Fuse is good?
Early Bush plasma - probably early LG panel - 42V5/V6/V7? If so watch out for sparklies/maldischarge fault.
I'd check input fuse and bridge rectifier for DC.

[joehezzer]

Re: usp440m-42lp psu

Fuse is good?
Early Bush plasma - probably early LG panel - 42V5/V6/V7? If so watch out for sparklies/maldischarge fault.
I'd check input fuse and bridge rectifier for DC.

fuses are good, i will check the bridge rectifiers as soon as i can

[Alastair E]

Re: usp440m-42lp psu

Pics of chassis....?

--I'll bet that PSU is OK from experience....

[joehezzer]

Re: usp440m-42lp psu

bridge rectifiers tested good, i will get more pics later

[joehezzer]

Re: usp440m-42lp psu

Fuse is good?
Early Bush plasma - probably early LG panel - 42V5/V6/V7? If so watch out for sparklies/maldischarge fault.
I'd check input fuse and bridge rectifier for DC.

yep you're right tom

[joehezzer]

Re: usp440m-42lp psu

Pics of chassis....?

--I'll bet that PSU is OK from experience....

model number pdp42tv006

[Alastair E]

Re: usp440m-42lp psu

Ha! A V7!

First plasma I ever potched with was a V7. Still got an alleged brand-new IPM for one kicking round somewhere....

10-1 that PSU is OK. You'll need to check for 5V stdby supply first before going any further.

[joehezzer]

Re: usp440m-42lp psu

Ok will have a look tomorrow when I finish work. The chap I got it off said they had a power cut and it never came back on

[Alastair E]

Re: usp440m-42lp psu

Thing is--The V7 is pretty long in the tooth now, and only a 480p res, so not worth spending any real dosh on--certainly not investing say 50 quid in a PSU!

A few tests will determine whats what...

Firstly, with set unplugged, use your meter to check the fuses on Y-SUS and Z-SUS. Any blown and there's a short somewhere....

Then check the resistance from each fuse--to chassis metalwork. This should initially 'kick' or read for say half a second as the caps charge, then read a pretty high resistance.

[joehezzer]

Re: usp440m-42lp psu

just looking for the 5v stby point, i can see 5v ctl

[joehezzer]

Re: usp440m-42lp psu

Firstly, with set unplugged, use your meter to check the fuses on Y-SUS and Z-SUS. Any blown and there's a short somewhere....

they are all ok checked them earlier (fuses), i disconnected the boards y-sus z-sus one at a time to see if it turned on still nothing

[Alastair E]

Re: usp440m-42lp psu

OK--Thats one of the 5V lines--there's usually a few. Some will be powered, some not when in standby.

Check 'em all, post results and the names/references of 'em pref with a pic of the plug you measured them at...

[joehezzer]

Re: usp440m-42lp psu

OK--Thats one of the 5V lines--there's usually a few. Some will be powered, some not when in standby.

Check 'em all, post results and the names/references of 'em pref with a pic of the plug you measured them at...

ok will do tomorrow cheers matey

[joehezzer]

Re: usp440m-42lp psu

ok so i have measured all the 5v standby and a couple of others and i am still getting no readings at all, they are all marked in yellow

[joehezzer]

Re: usp440m-42lp psu

a bigger picture, the numbers on the pics refer to the first pic then the second and so on, but i think i kinda screwed it up lol

[wills123]

Re: usp440m-42lp psu

i recently just did one of theese, managed to get a psu from ebay for £30 delievered, the one i had , b/r shorted and a load of mosfets ,so got another board
http://www.ebay.co.uk/itm/4004140660...84.m1497.l2649
it wasnt really worth doing but my missus likes the tv an for keeping her quiet............... priceless