toshiba 49ul5a63db 6month old

[chrislyons]

6 month old faulty already i got this this tv second hand its shown no picture bud sound the back lights works perfect, all lit up just no immage on screen done some checks on on panel .12v and 3.3 there , previus owner was told to sent it back at cost £80 quid was told its common fault ,i have no intention doing that rather hopfully fix it

[Hamie]

Re: toshiba 49ul5a63db 6month old

You'll need to check for 12v on each side of the built in tcon board.

[Hamie]

Re: toshiba 49ul5a63db 6month old

Sorry ignore that you've already checked.
Take better photos of that board.
Look for avdd test point should be around 15v

[chrislyons]

Re: toshiba 49ul5a63db 6month old

ok thank you will check

[chrislyons]

Re: toshiba 49ul5a63db 6month old

more photos ,ok i am getting 1.8v at avdd

[budm]

Re: toshiba 49ul5a63db 6month old

So are you getting 12V at the HVIN_12V test point?
Only 1.8V at AVDD is bad for sure.
https://www.badcaps.net/forum/showpo...7&postcount=13
T-con voltages (typical)
1. Vin (Vcc): 12Vdc or 5Vdc
2. Vlogic,LCM, Vddd,VCC): 3.3Vdc
3. Vda (Vs, Vsource,VDD, Vdda, Avdd): 14Vdc~20Vdc
4. Vgh (Vgon,VGHR, Von, Vddg): 20Vdc~30Vdc
5. Vgl (Vgoff,VST,VGHF,VGHEVEN, Voff,Veeg): -5Vdc~-7Vdc
6. HVDD about 8v
7. DVDD,VDDC 3.3v, 1.2v
8. VCOM about 5~10vdc (about half of Avdd)

[chrislyons]

Re: toshiba 49ul5a63db 6month old

such crap set i take it the tcon is built into panel ? dont quick check for shorts all seems ok, i have noticed the samsung ic is getting hot not sure if thats correct,

[dick_barton]

Re: toshiba 49ul5a63db 6month old

Yet again a possible set with a shorted ceramic cap on the integrated Tcon/panel board.

[Hamie]

Re: toshiba 49ul5a63db 6month old

Do as Mr Barton says; check and double check every ceramic cap.

[chrislyons]

Re: toshiba 49ul5a63db 6month old

i checked them all no shorts

[petehall347]

Re: toshiba 49ul5a63db 6month old

guarantees are at least 12 months in the uk . iit shouldn't cost anything to get it repaired/replaced

[chrislyons]

Re: toshiba 49ul5a63db 6month old

the guy didint want to pay 80 quid costa and hassle return nothing i can do no paper work

[jostewcrew]

Re: toshiba 49ul5a63db 6month old

the guy didint want to pay 80 quid costa and hassle return nothing i can do no paper work

paperwork is not important. they ask for model, serial, and personal info with around about date of purchase. they know if it is or out of warranty. this is all. they will send an authorized service provider to repair no charge under manufacturers warranty. call them.

that being said, if a fuse keeps blowing and you cant find a short on the caps, if it is an tcon built in to the main board, i say it most likely a voltage regulator...whether it be a mosfet (check for short at your coils near your fets) or built into a ic ( will need to follow schematic to find sources of mains and follow to tcon fuse, then find pin outs for ic's)....replace main board or troubleshoot, or callnin for warranty repair. Cheers.

[budm]

Re: toshiba 49ul5a63db 6month old

So are you getting 12V to the T-CON? iN YOU POST #1 it shows "done some checks on on panel .12v and 3.3 there" Is that 0.12V or 12V?
Also are you sure you are making good contact with t he cap's end when checking resistance of the cap? I just want to make it is not like this thread with false readings until OP got new meter with better probes and then found the bad cap: https://www.badcaps.net/forum/showth...131#post970131