LCD monitor power led blinking

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LCD monitor power led blinking

Post by Lenaren on Tue Mar 25, 2014 8:41 am

Help po... may inayos po akong LCD monitor Hanns-G brand... sumabog po ung power IC at pumutok ung fuse... nung napalitan na pag ON nag-bblink lang power led.. kasabay ng blink merong display naman na nalabas... saan pa kaya ang may tama nito?... first time ko po mag-repair ng LCD.. ok lang po ba i-ON ang unit na di nakakabit ung LCD mismo? ...voltage check sana ako sensya na po.... tnx

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Re: LCD monitor power led blinking

Post by Hertz on Tue Mar 25, 2014 10:36 am

puede yan kong hindi naka enable ang protection niya.

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Re: LCD monitor power led blinking

Post by Hertz on Tue Mar 25, 2014 10:37 am

pa post ng display na naaaninag?

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Re: LCD monitor power led blinking

Post by Lenaren on Tue Mar 25, 2014 12:42 pm

buo master ang display... kaso nawawala kasabay ng blink kada segundo... pag nakasalpak sa cpu makikita mo ung actual na activity kaso papatay patay lang...

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Re: LCD monitor power led blinking

Post by Lenaren on Tue Mar 25, 2014 12:50 pm

sori di pala masyado buo... pero makikita mo po ung display nya ng kaunti... sensya na po

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Re: LCD monitor power led blinking

Post by Lenaren on Tue Mar 25, 2014 1:34 pm

TOP245YN po ang IC... e2 po board...


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Re: LCD monitor power led blinking

Post by ultrasonic™ on Tue Mar 25, 2014 3:48 pm

my ESR ka ba sis... ? try mo check ang mga ecaps,, kng wla nmn go for direct sub.. check din ang mga zener diode sa mga secondary load side

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Re: LCD monitor power led blinking

Post by arkin on Tue Mar 25, 2014 10:02 pm

chek din rectifier diode sa secondary side,baka my leak.

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Re: LCD monitor power led blinking

Post by arkin on Tue Mar 25, 2014 10:05 pm

pahabol..since ccfl pa yan,chek mo rin ecaps sa inverter...

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Re: LCD monitor power led blinking

Post by Lenaren on Thu Mar 27, 2014 2:55 pm

.... salamat po master sa inputs
....master arkin d2 rin po ba makikita sa board na pi-nost ko ung ecaps? check ko na lang po ung mga sinabi nyo... tnx

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Re: LCD monitor power led blinking

Post by arkin on Thu Mar 27, 2014 9:41 pm

yap!dyan nga..sa tingin ko yong dalawang green ecaps.chek mo lng.

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Re: LCD monitor power led blinking

Post by ultrasonic™ on Fri Mar 28, 2014 12:01 pm

^ agreed.. IP board na kasi yan ts... pinaghalong power supply at inverter ckt

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Re: LCD monitor power led blinking

Post by Lenaren on Fri Mar 28, 2014 6:28 pm

Update lang... eto po result nung check ko mga parts...



...ung diode na to (legend A) meron pong reverse reading na 400k.... OK lang po ba to master?

...ung ecap na to (legend B) 1 side lang meron reading sa 100K range ng aking multimeter... OK lang din po bato?

...ung brown cap na to rated 47J 1KV paano ko po ito ma-check using analog multimeter

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Re: LCD monitor power led blinking

Post by Lenaren on Fri Mar 28, 2014 6:31 pm

ay sori po double post... paki-delete n lang po ung isa... tnx

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Re: LCD monitor power led blinking

Post by ultrasonic™ on Sat Mar 29, 2014 4:17 pm

dpat out of board ka mag test nyan sis... para accurate
abwt sa diode (legend A) normal na my mkukuha kang reading in reverse bias lalot kng FR (fast recovery diode yan). btw kng duda ka jan.. pwde mo replasan mo na ng ibang diode... pg no improvement balik mo ang orig

abwt sa cap (legend B) depende yan sis sa value ng cap mo at pag range ng Ohmmeter mo..  kng bibase natin sa basic
kng mgtitest tayo ng capacitor lalot kng sa analog

dpat pasok tayo sa ganitong Range

RX10K and above  = 0.01 uF to 1uF
RX1K = 1uF to 47 uF             
RX10 = 47 uF to 1000 uF
RX1 = 1000 uF and above

minsan sa maling range palang ma mimisdiagnose na tau...
bantayan lng natin ang galaw ng needle/pointer

paalaala lng. di masxadong accurate ang pgGamit nito lalot kng kulang tau sa experience.. meron kasing mga caps na machacharge at nadidischarge pa rin khit leak nato


kya minsan mas recommend kng gawa tau ng ESR  ^_^






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Re: LCD monitor power led blinking

Post by ultrasonic™ on Sat Mar 29, 2014 4:35 pm

phabol.. abwt sa 471J range mo pnkamataas sis tapoz tignan mong maiigi ang needle kasi kunti at saglit lng yan gagalaw

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Re: LCD monitor power led blinking

Post by arkin on Sun Mar 30, 2014 3:10 pm

agree din ako ky ultra peace voltage ka rin,baka sakaling my mkita kang idea kng san flactuating yong voltage.

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Re: LCD monitor power led blinking

Post by arkin on Sun Mar 30, 2014 3:12 pm

Laughing voltage chek yon.sori nagmadali kc lol! 

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Re: LCD monitor power led blinking

Post by wellroidarab on Mon Aug 11, 2014 2:27 pm

nsubukan u n bng sukatin ang supply ng secondary (12v & 5v) kung nagvavary rin kasabay ng pag blink nyan?

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Re: LCD monitor power led blinking

Post by DJFEL on Tue Sep 23, 2014 8:09 am

ano updit neto sis..

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Re: LCD monitor power led blinking

Post by DJFEL on Tue Sep 23, 2014 8:10 am

malapit na ma boo yong ESR ko...updit ko lang dito sa forom..

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Re: LCD monitor power led blinking

Post by Lenaren on Sun Nov 16, 2014 8:55 pm

master kinuha na pala to ng may-ari... bili na lang daw sya ng bago... sayang nga eh....

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Re: LCD monitor power led blinking

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