spectre x322bv-hd model x32 led backlights bad?

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

no carbon traces on the psu where the connector for the lamps are. the board look excellent like not a thing is wrong i checked over it several times for any trace of burnt or bad parts etc. i did check the resistance if i did it correctly and you are right i think those caps are leaking i checked them with the 2000k ohm range and with the board out of the tv checked and both of the 2 inverter caps were bouncing all over the place up and down. i am guessing they are bad? what do you think? thanks for helping me out so far

[budm]

Re: spectre x322bv-hd model x32 led backlights bad?

Not the PSU board, there is circuit board where the lamps are, the one I work on has small long board inside the panel and it has a bunch of ballast caps on it. I am not talking about the power supply board.
The blue caps on the power supply board should be checked off the board also.
Picture number of the disassemble panel that shows the lamps, I cannot tell if on the left side it has circuit board or not, I can see lamp sockets.

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

if you mean where the ccfl lamps are in the panel i didn't see any caps in there both sides just had a metal plate that had the connectors on them for the ccfl's to attach to

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

and the connectors that go from the psu are attached with a screw to the metal plate that hold it to the plastic casing

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

neither side had a board. is that why the inverter part of the psu has so many problems?

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

make date was 2/13/2012 on mine. maybe they made changes for the worse

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

i just went back and answered you wrong no the ballast caps aren't on a board by the ccfl's it doesn't have any other than the ones on the psu

[splitcrete]

Re: spectre x322bv-hd model x32 led backlights bad?

.

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

so by the ballast caps fluctuating if i did the resistance test properly does that mean they are bad or is something else causing them to act up?

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

i meant the inverter caps not the ballast caps

[selldoor]

Re: spectre x322bv-hd model x32 led backlights bad?

Can we get some pictures of what you are talking about?

What do the leads from the bulbs plug into? we need a picture of that.

None of your earlier pictures are good enough for trouble shooting.

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

their is only 2 leads 1 for the left side and 1 for the right side and they are attached with a screw to a metal plate containing all the connectors for the ccfl's and both leads go back to connectors on the psu. no ballast caps or boards containing ballast caps where the ccfl's are located inside the panel

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

so there isn't anything to actually troubleshoot in the panel and all the tubes look fine and flash upon start up so i am guessing it has to be low voltage or leaking resistance from the inverter caps like budm stated but i don't know which of the 2 for sure is causing the problem or how to find out exactly

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

so i guess that's an i don't know...

[budm]

Re: spectre x322bv-hd model x32 led backlights bad?

I am stump at this point, the way the lamps are lit up indicating not enough high voltage being applied to the lamps. You can try changing those ballast caps on the power supply board. Since we have no way to verify if the ballast cap is good or due to we do not have high voltage to apply to the cap to see if it will breakdown, it can also be the inverter transformer or the drive circuit is bad.

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

i changed the ballast caps and i changed the inverter caps and i also changed a 103m 1kv cap before the inverter caps that was reading 4.2nf capacitance but should be reading 10nf and still no change. when i unplug either connector going to the ccfl lamps and wiggle it around the backlights get a little brighter but it is intermittent and they don't come on all the way. how can i check the inverter transformer or the drive circuit?

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

these are what i changed so far. the 1 with the star was suppose to read 10nf but was reading 4.2nf. does anyone else have any ideas as to what would cause it to not fully light up the backlights when all the voltages are correct? i also checked all the other caps except the 1 right next to the 1 that read low capacitance because it is a .1nf 1kv cap and it won't read that low and i don't have any laying around to swap it out. i do have a .22nf 2kv cap though would that be ok to try out or is it too much more than it should be to safely do so or if it would work at all? i don't know too much about high voltage caps or if you can go up in volts or farads etc.

[budm]

Re: spectre x322bv-hd model x32 led backlights bad?

I am a little confused, are the two brown one you are reading low capacitance? Those two brown caps are part of the bridge drive circuit. What the vales as printed on the body?

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

no they were ok but i replaced them anyways they were 224k 400volt they read around 210nf when checked. the 1 circled with the star next to it read 4.2nf but it is a 10nf cap so i replaced it but still no difference. the only 1 i didn't replace is the blue cap to the left of the yellow circled 1 that is a .1nf 1kv but i don't have any to try out replacing it thats why i asked about the .22nf 2kv cap to try it in place of that 1 to see if anything changes.

[philliesfan30m]

Re: spectre x322bv-hd model x32 led backlights bad?

i'm in need of of some help. i did everything possible i could think of. when i tested the connector which lead to the backlights and would move it around it would spark and eventually got the screen to come up almost all the way but then it started to smell a little hot. is it shorting to ground somewhere? is that why when i touch it with the probe it sparks and the lights flicker?