Hanns g 32" JT261 back light fault

[shepp]

Re: Hanns g 32" JT261 back light fault

[QUOTE=anotherdude;321752]tom, if you don't mind me asking are you refferring to the SD caps?

if so again if you don't mind could you explain why they are inferior?[/QUOTE

there is 2 SD ones and a couple of Nichicon im guessing there the ones you mean..as they are the cheap ones


SORRY TRIED TO DELETE THIS POST BUT CANT SEEM TO DO IT

[shepp]

Re: Hanns g 32" JT261 back light fault

Check the 24V on the PSU. If it's unstable, that could be the problem. Also, it looks like you used inferior capacitors which may be causing your issue.

i will check all voltages and post results tomoz, as for caps, thats all i had at the time, i dont mind ordering some more though if it will fix the issue, i might even have some better ones some where that i can use fingers crossed

[tom66]

Re: Hanns g 32" JT261 back light fault

They aren't made for use in switching power supplies like that due to their high esr, low ripple current, and short lifespan.

[anotherdude]

Re: Hanns g 32" JT261 back light fault

Check the 24V on the PSU. If it's unstable, that could be the problem. Also, it looks like you used inferior capacitors which may be causing your issue.

tom, if you don't mind me asking are you refferring to the SD caps?

if so again if you don't mind could you explain why they are inferior?

[tom66]

Re: Hanns g 32" JT261 back light fault

Check the 24V on the PSU. If it's unstable, that could be the problem. Also, it looks like you used inferior capacitors which may be causing your issue.

[shepp]

hi all,

i bought this tv with bad caps replaced them all and the tv worked fine, so i sold it a friend and a few months later it has returned......

now the tv comes on fine but then after say 5 mins sometimes the back light goes out.....the sound remains.....and the picture is there...but no back light

so i order a 2nd hand invertor....it comes i fitted it....tv works a treat

few days later i ring my mate and tell him im just gonna test it again before i drop it round, put it on and low and behold same fault! now im guessing its the power supply but now when i test it.... it wont fault on me!

has anyone got any ideas or if anyones had similar issues i could really do with the input

check out the pictures the diode near the transistor looks a bit suspect but i checked it with diode test and it tests at 880 1 way, so think this is roughly ok?