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Author Topic: Sharp LC-22L50M LCD TV Inermittent function problem  (Read 244 times)

Offline Min

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Sharp LC-22L50M LCD TV Inermittent function problem
« on: May 22, 2012, 04:33:39 PM »
Share ko lng ito for reference.

Intermittent ang function nya. Upon power ON minsan OK sya, lalabas ang picute then automatically switch to Video1 then again shifts to Video2 then to PC input..... and then sometimes shutdown to standy mode. Paulit ulit sya ganun khit hindi mo ginagalaw kusa naglilipat.

This is very similar to TCL TV problem and guest what? Same din sila ng salarin TACT SW ;D ;D ;D. Actually 2 pcs. among the 8 switch ang na test ko na leak pero I decided to replace all para iwas backjob. OK na ung unit under test right now.















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Sharp LC-22L50M LCD TV Inermittent function problem
« on: May 22, 2012, 04:33:39 PM »

Offline ultimate

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #1 on: May 22, 2012, 04:53:28 PM »
nice! thanks for sharing.

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #1 on: May 22, 2012, 04:53:28 PM »

Offline Min

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #2 on: May 22, 2012, 05:03:48 PM »
eto pa nga pala info. ung mga tact switch madaya testingin sa tester kasi kapag nainitan ng matagal ung paa ng soldering iron me chance na hindi na magpakita ng leak. Kaya para makita mo ung leak mabilis lng initan ung paa sabay higop ;D. Naobserbahan ko kasi nung hang ko isang paa sukat ko leak, nasukat ko 50k pero nung tinanggal ko na at tinest uli nasa around 1meg na ung leak resistance.
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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #2 on: May 22, 2012, 05:03:48 PM »

Offline mcleod

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #3 on: May 22, 2012, 06:09:49 PM »
thanks for sharing magagamit ko ung picture mo ng tact switch.  ;D

+1 ka uli! (ooops, credit muna; delay for 3 hours daw!)  ;D

What makes you think, we owe you an answer? Ask and you shall receive... but all in the proper time.

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #3 on: May 22, 2012, 06:09:49 PM »

Offline Min

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #4 on: May 22, 2012, 06:17:29 PM »
he,he salamat sis. Dineskartehan ko lang ung tact sw dapat 2pin eh 4 pin ang meron ako. ayun putol paa,ubra na. ;D
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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #4 on: May 22, 2012, 06:17:29 PM »

Offline pete

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #5 on: May 22, 2012, 07:37:45 PM »
sir ask ko lang ilan po ba dapat ang reading ng voltage sa paa ng tact switch kasi sa akin 1.2vdc lang ang nakukuha ko kahit naka hung na ang lahat ng tact switch.

ito ang link ng post ko baka dyan pa ang unit mo  http://www.electronicslab.ph/forum/index.php?topic=33769.0;topicseen

TIA

Offline Min

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #6 on: May 23, 2012, 07:22:59 AM »
Sir pete ang nasukat ko nung naka hang na ang mga tact sw is around 3 volts. Nung nakakabit pa lahat yan at hindi ko pa napalitan its around 1.2- 1.5 volts ( unstable )

Heto ung video na nameasure ko nung sira pa.



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Offline pete

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #7 on: May 23, 2012, 07:32:46 AM »
+1 parang same lang pero sa akin hung na talaga e 1.2vdc parin mukhang UOC na ito dahil may marka ng pag iinit sa likod ng board

Offline junrosido

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #8 on: May 31, 2012, 10:05:41 AM »
yan mga intermittent condition ay sanhi ng moisture build up yan lalo na pag airconditioned ang bahay na kung saan ay sarado ang mga doors and windows walang ventilation.i-verify mo iti sa custumer mo na pag off ang aircon ay dapat i-open ang mga bintana sa lugar ng tv i-suggest mo ito para masense na concerned technician ka tol sigurado ako na maaapreciate ka nila making u a someone unique among others try mo.

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Re: Sharp LC-22L50M LCD TV Inermittent function problem
« Reply #8 on: May 31, 2012, 10:05:41 AM »

 

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