SHARP Cinemaborg 21V-J100M No start up pero present ang b+

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SHARP Cinemaborg 21V-J100M No start up pero present ang b+

Post by jojogreg on Fri Oct 26, 2012 1:31 pm

present yung 12vdc at yung 150vdc from smps secondary output connected directly to b+ pin sa flyback pero alang output yung lahat ng pins sa secondary ng fbt tulad ng 24vdc for vertical supply,185vdc para sa crt at 12vdc para sa mga regulator ic.Bakit po kaya mga master alang output ang secondary ng flyback?anu ba kailangan na signal para magproduce ng output voltage ang flyback?Yun po bang Horizontal pulse drive to horizontal output transistor going to collector pin ng fbt ay kailangang present para mgoscillate ang fbt mga master?tama po ba ang aking pagkakaalam?advise naman po..

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Re: SHARP Cinemaborg 21V-J100M No start up pero present ang b+

Post by ultrasonic™ on Fri Oct 26, 2012 6:23 pm

^ yapz tama ka sis... yan nga tamang operation...

sa mga ganyan scenario kailngan mu agad echeck ang Hvcc ng jungle/chroma mo.. vrms 9V.. pg wla yan.. maybe my shorted.. kya resistance check agad. pg pumalo ng baliktaran ay try to unload pa isaisa ang mga loads.. jungle (pin26), ecap (c633) at zener(D631) ... pg wla nmn short.. expect mu nlng muna na my open path sa voltage rail nya.. kya back trace r634, d605,

pg napalabas mu nmn ang 9V for Hvcc.. check nmn kau maiigi sa system con be sure na umaabot ang 5V... wag din kaligtaan na laging pnipress ang tact sw. for power button everytime na ngchecheck ng unit... at laging monitor sa Voltage sa bawat test point..

then balik kau sa HDT area

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Re: SHARP Cinemaborg 21V-J100M No start up pero present ang b+

Post by jojogreg on Wed Oct 31, 2012 9:40 pm

Master ultrasonic update nga pala sa ginagawa kng sharp cinemaborg 21V-J100M.Napansin ko na pag pag hinahang ko yung pin ng H.vcc sa jungle ic ay present ang 9.1 volt sa positive pin ng both zener diode D631 and cap C633.I suspect na meron shorted ang internal ckt ng jungle IC kaya ngtry na ako magpalit ng IC ang crt socket dahil sa previous defect ay blurred picture at pag power on..YUN ng ok na po ang TV perfect picture display but may problema naman akong napansin ala po SOUND.pagnilapit ko ang tenga ko sa speaker meron akong naririnig na mahinang mahina sound na may kasama ugong..Isip ko nito ok ang audio amplifier o ang audio nya kasi ngsukat ako ng mga voltage sa audio present at tama naman ang mag voltahe ..Anu po kaya master ang problema nito?maari kayang sa service mode setting lang kailangan?panu po ba gawin ang setting sa service mode ng model na eto SHARP 21V-J100M?patulong naman po master..salamat.

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Re: SHARP Cinemaborg 21V-J100M No start up pero present ang b+

Post by baddypepito on Thu Nov 01, 2012 9:08 am


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Re: SHARP Cinemaborg 21V-J100M No start up pero present ang b+

Post by baddypepito on Thu Nov 01, 2012 9:11 am

try din sis idoble check yong audio amp section.. baka sira ang audio ic nya... tda7056a take note lang..... hindi gagana ang mga ic na walang letter A sa last number.

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Re: SHARP Cinemaborg 21V-J100M No start up pero present ang b+

Post by Hertz on Thu Nov 01, 2012 8:35 pm

check din ang speaker. may mga cinemaborg na di gagana pag-isa sa mga speaker ay sunog. naka series lang kasi

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Re: SHARP Cinemaborg 21V-J100M No start up pero present ang b+

Post by arkin on Fri Nov 02, 2012 7:44 am

baddypepito wrote:try din sis idoble check yong audio amp section.. baka sira ang audio ic nya... tda7056a take note lang..... hindi gagana ang mga ic na walang letter A sa last number.
gagana din yan,kunting modi lng.pakisearch nlang yong data sheet at compare nyo. pointout

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Re: SHARP Cinemaborg 21V-J100M No start up pero present ang b+

Post by ultrasonic™ on Mon Nov 05, 2012 4:54 pm

super agreed sa lhat ng nasa itaas... pki double check lng ts..

mktanong na rin ako
both AV mode & TV mode ba ang wlang tunog.. ?

regarding sa how to enter service mode?
na try mu na ba ang
hold vol. up & channel up tapos power on
o di kaya vol. down + channel up then power on


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Re: SHARP Cinemaborg 21V-J100M No start up pero present ang b+

Post by Electro on Wed Nov 21, 2012 1:47 pm

ano update nito master jojo? sundan mo lang sila master

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Re: SHARP Cinemaborg 21V-J100M No start up pero present ang b+

Post by DJFEL on Sat Nov 24, 2012 1:55 pm

sub...abang sa apdit..

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Re: SHARP Cinemaborg 21V-J100M No start up pero present ang b+

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