Author Topic: Technika LCD22DVD Backlight On Voltage (Read 10042 times)

scooby-doo · « **on:** December 07, 2011,11:38:32 »

No backlights coming on everything else working...it has a small 12v inverter (IN220402) and main board (B.LT712C) when testing "B/L ON" goes to 1.7v when tv is turned on...should this be more around the 3-5v range???

Thanks in advance

Mulja tv repair portal · « **on:** December 07, 2011,11:38:32 »

sparky · « **Reply #1 on:** December 07, 2011,14:16:16 »

hi
if there are some 9pf caps 3 kvw can cause fault also
if one of tubes down need a ccfl tester to check
dave

jimca007 · « **Reply #2 on:** December 07, 2011,16:37:01 »

dont know if they're still using the same psu but loads of these went down with bad caps 2 16v 1000uf if i remember correctly

Mulja tv repair portal · « **Reply #2 on:** December 07, 2011,16:37:01 »

jimca007 · « **Reply #3 on:** December 07, 2011,16:39:48 »

remember to always see the whole picture before going forward see attachment

dougc · « **Reply #4 on:** December 07, 2011,18:14:54 »

Nice one Jim.

scooby-doo · « **Reply #5 on:** December 08, 2011,03:37:23 »

Great Video Jim....didnt expect that at the end.

As for the fault, already replaced the 16v/1000 caps also changed the 9pf caps too, still nothing... I havent got a ccfl tester. So Im buggered on that front.

Cheers for your help chaps

Mulja tv repair portal · « **Reply #5 on:** December 08, 2011,03:37:23 »

sparky · « **Reply #6 on:** December 08, 2011,12:12:08 »

hi
you can make one for about a fiver from maplins
they have a inverter type replacement for laptops
can be modified to test up to 32" ccfl tubes mentioned it
a few weeks back
think doug,and chris made one up
dave

Turnip · « **Reply #7 on:** December 08, 2011,12:16:11 »

Hi Sparky,

Suggest remind folks not apply 12v on the 5/12v input - it doesn't like it up it - Chris.

bluesmoke · « **Reply #8 on:** August 06, 2012,04:57:00 »

hi sorry for bringing this topic back up but i have the same set with the same fault were you able to sort it ?
thanks dave

sparky · « **Reply #9 on:** August 06, 2012,06:09:35 »

hi
tested nearly everything in end changed inverter panel cured fault
got one from ebay

bluesmoke · « **Reply #10 on:** August 06, 2012,14:35:01 »

hi thanks for the reply i have already changed invertor but i havent changed the 9pf caps 3 kvw as i havnt got any suppose thats next

sparky · « **Reply #11 on:** August 07, 2012,03:47:52 »

hi
if you changed inverter panel them caps or on there could
be screen faulty

Turnip · « **Reply #12 on:** August 07, 2012,13:27:43 »

Hi Bluesmoke,

Have you given full model number ? - lots about, and most with additions after the LCD22DVD (the + xxx bit) that makes considerable difference - Chris.

bluesmoke · « **Reply #13 on:** August 15, 2012,05:01:40 »

hi sorry for the late reply been so busy with kids hols!
hi turnip the full model number is
X22/14E-GB-TCDU-UK
REF LCD22-208E
PRODUCT CODE TX22J14BTCDUGO30

any help would be great thanks dave

Turnip · « **Reply #14 on:** August 15, 2012,13:54:13 »

Hi, Bluesmoke,

Does it have Inverter- LK-IN220413 ? - you didn't say - if so, nothing yet posted - Chris.

Mulja tv repair portal · « **Reply #14 on:** August 15, 2012,13:54:13 »

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Author Topic: Technika LCD22DVD Backlight On Voltage (Read 10042 times)

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