Author Topic: Samsung Lcd monitor backlight shutsdown SyncMaster 740n (Read 1850 times)

noman75 · « **on:** July 04, 2011, 11:38:02 AM »

eto an vids nito mga sis..

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ok rin lahat ecaps sa PSU at ok lahat secondary ouputs...

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meron ding masisilip when light shuts off...

Mga sis d kaya pundi na tong backlight nito??? need idea mga sis,,,, TIA

Philippine Electronics Forum · « **on:** July 04, 2011, 11:38:02 AM »

Triple_D · « **Reply #1 on:** July 04, 2011, 11:49:01 AM »

makiabang muna samsung di kaya sa inverter problema nito..

Philippine Electronics Forum · « **Reply #1 on:** July 04, 2011, 11:49:01 AM »

noman75 · « **Reply #2 on:** July 04, 2011, 11:56:33 AM »

duda rin ako sis kasi minsan matagal din namamatay 5-10 mins before shuts off...

Philippine Electronics Forum · « **Reply #2 on:** July 04, 2011, 11:56:33 AM »

comtronixs · « **Reply #3 on:** July 04, 2011, 01:47:45 PM »

yang mga blue na caps sir nacheck ninyo na po ba

Philippine Electronics Forum · « **Reply #3 on:** July 04, 2011, 01:47:45 PM »

noman75 · « **Reply #4 on:** July 04, 2011, 02:44:49 PM »

^ nacheck ko na rin sis,,ok rin...

Philippine Electronics Forum · « **Reply #4 on:** July 04, 2011, 02:44:49 PM »

comtronixs · « **Reply #5 on:** July 04, 2011, 03:26:54 PM »

yung high volatge transformer

ilan ba sets ng cfl niyan kung apat yan malamang sira ang ang isa sa cfl niyan or pwedeng yung inverter ic inverter ic

panyero · « **Reply #6 on:** July 04, 2011, 03:28:14 PM »

Quote from: comtronixs on July 04, 2011, 01:47:45 PM

yang mga blue na caps sir nacheck ninyo na po ba

ito ang sinasabi ko sa lumang tread na hindi mag sa shut down kung weak lng ang ccfl.check nyo na po ang ccfl ilabas nyo sa panel at i connect sa labas para makita kung humina ang ilaw opinion lang.

noman75 · « **Reply #7 on:** July 04, 2011, 04:03:05 PM »

Quote from: panyero on July 04, 2011, 03:28:14 PM

ito ang sinasabi ko sa lumang tread na hindi mag sa shut down kung weak lng ang ccfl.check nyo na po ang ccfl ilabas nyo sa panel at i connect sa labas para makita kung humina ang ilaw opinion lang.

sis napansin ko lang bago mamatay ung ccfl may part sa itaas na medyo madilim... ccfl na kaya to? alanganin pa kc bumaklas nito baka matuluyan bumigay

1 time pa lang kc ako nakabaklas ng lcd panel

panyero · « **Reply #8 on:** July 04, 2011, 04:08:09 PM »

as on my experience sis ccfl yan,kung naka open makikita mo naman sa likod yong reflect ng ilaw may mga butas yan para masilip kung full bright,or pag palitin mo yong mga connection ng ccfl then obsreve kung saang parts naman didilim.

comtronixs · « **Reply #9 on:** July 04, 2011, 04:09:31 PM »

ah maitim na ilang sets ba ng cfl meron yan sir

kapag ganun eh cfl na nga yan... pero better check rin muna lahat sa inverter section

noman75 · « **Reply #10 on:** July 04, 2011, 04:19:27 PM »

^ nd ko pa nabaklas sis,, double check ko muna inverter nito up ko lang later...

sky · « **Reply #11 on:** July 04, 2011, 05:07:03 PM »

@ ts try mo palitan ng cfl..kung may extra ka na cfl jan.. kahit nakalabas lang para d mo na balklasin..

x13r_kit_0 · « **Reply #12 on:** July 04, 2011, 05:16:58 PM »

madali talaga masira cfl...ang mahirap..madalang bilihan nyan...

paabang nalang...

noman75 · « **Reply #13 on:** July 04, 2011, 05:20:10 PM »

^ yan nga lang ala pa akong mga parts when it comes in LCD

,,, ano pala pwede pang test pag wala ka namang ccfl spare? wala ba pinoy teknik para nito?

unitech · « **Reply #14 on:** July 04, 2011, 05:46:13 PM »

patambay...ccfl na yan sis madilim tapos namamatay..

ultrasonic™ · « **Reply #15 on:** July 04, 2011, 06:38:06 PM »

mukhang weak ccfl na nga... congratz kapehan na..

try mung i bypass..
kong walang external ccfl driver... gamitin mu si resistor na pang bypass.... hanapin ang input ng inverter circuit at mag insert ng signal

pag umilaw ng steady... ccfl nga

noman75 · « **Reply #16 on:** July 04, 2011, 06:58:33 PM »

Quote from: ultrasonic™ on July 04, 2011, 06:38:06 PM

mukhang weak ccfl na nga... congratz kapehan na..

try mung i bypass..
kong walang external ccfl driver... gamitin mu si resistor na pang bypass.... hanapin ang input ng inverter circuit at mag insert ng signal

pag umilaw ng steady... ccfl nga

OK lumabas din pinoy teknik

TY sis Ultra,,, +1 sayo = 584 kna

panyero · « **Reply #17 on:** July 04, 2011, 08:56:34 PM »

Quote from: ultrasonic™ on July 04, 2011, 06:38:06 PM

mukhang weak ccfl na nga... congratz kapehan na..

try mung i bypass..
kong walang external ccfl driver... gamitin mu si resistor na pang bypass.... hanapin ang input ng inverter circuit at mag insert ng signal

pag umilaw ng steady... ccfl nga

paano to sis p share naman ng trick n yan.

noman75 · « **Reply #18 on:** July 04, 2011, 09:48:46 PM »

uu nga sis ultra,, ano pala value ng res at saan tap point ng res sa inverter input to ground ba?

lhan · « **Reply #19 on:** July 04, 2011, 09:49:53 PM »

Quote from: ultrasonic™ on July 04, 2011, 06:38:06 PM

mukhang weak ccfl na nga... congratz kapehan na..

try mung i bypass..
kong walang external ccfl driver... gamitin mu si resistor na pang bypass.... hanapin ang input ng inverter circuit at mag insert ng signal

pag umilaw ng steady... ccfl nga

master dex paki explain naman ng mabuti ung tiknik nyo po, ndi ko gets,,, pag bypass ung feedback b nya, eh umilaw ng steady,,, bkt cfl eh umilaw naman,,?

ibig nyo sabihin weak nb cfl nun,,, tama po ba ako sir,,,

Philippine Electronics Forum · « **Reply #19 on:** July 04, 2011, 09:49:53 PM »

Author Topic: Samsung Lcd monitor backlight shutsdown SyncMaster 740n (Read 1850 times)

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