Help: Sony Trinitron KV-J21MF1 Blinking LED

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by ultrasonic™ on Thu Jul 11, 2013 1:22 pm

sis ts ilan ba ang G2 mo?
baka weak tube yan...

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by Lenaren on Fri Jul 12, 2013 10:21 am

Update lang....

Eto po mga readings...

@ CRTboard:

200v pin = 105-110v
1000v pin = 80-110v
G2 = 98-100v

@ Main board:

B+ = 75- 120v
9V Reg. (PQO9RE11)
P1 = 2.5-6.4v
P2 = 1-6.4v
P3 = 0
P4 = 2.2-4.6v

Question:

Normal po ba sa mga zener diode na may reading ung reverse @ 10k range in multimeter? May mga zener kasi akong na test out of circuit na may reading @ 10k range...

Sa sony model master, kelangan po po ba nakakabit lagi ung degaussing coil? Kasi nung nakalimutan kung ikabit umusok ung 470ohms na resistor na naka-parallel sa pins ng degaussing coil...

Paminsan-minsan may audible sound coming from the flyback... di naman sparks...

Ano po ung pwedeng e-isolate na mga supply dito...

Sensya na dami kong tanong...

Salamat!!

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by ultrasonic™ on Fri Jul 12, 2013 12:49 pm

Lenaren wrote:Normal po ba sa mga zener diode na may reading ung reverse @ 10k range in multimeter? May mga zener kasi akong na test out of circuit na may reading @ 10k range...

 normal yan sis.. para sa mga lower voltage value lalo na yung mga 3 samthing
pero sa higher voltage value... di na yan normal.. leak na yan

Lenaren wrote:Sa sony model master, kelangan po po ba nakakabit lagi ung degaussing coil? Kasi nung nakalimutan kung ikabit umusok ung 470ohms na resistor na naka-parallel sa pins ng degaussing coil...

 yes.. normal yan sis.. kasi yang 470ohm ay nakaparallel sa AC source via posistor.... pg inalis ang degaussing coil... xa na lang ang maiiwang load... kaya mahihirapang xang saluin lahat ang 220VAC.. (^_^
kng medjo nahihirapan ka jan..at still on going pa rin ang troubleshooting mo...pwde mo munang e-condemn ang deagussing ckt.. tanggalin mo lang yang 470 or posistor at pwde mo na yang di ikabit ang deagussing coil.. ibalik mo nlng lhat pag ok na tlga ang unit...

Lenaren wrote:Update lang....

Eto po mga readings...

@ CRTboard:

200v pin = 105-110v
1000v pin = 80-110v
G2 = 98-100v

@ Main board:

B+ = 75- 120v
9V Reg. (PQO9RE11)
P1 = 2.5-6.4v
P2 = 1-6.4v
P3 = 0
P4 = 2.2-4.6v

masxadong mababa ang 1KV mo sis.. unahin mo muna yan... try mo nga direct sub ang resistor mo na 1K ohm 1/8w before mag fast recovery diode rgpxxx.. matotunto mo yan through col pin ng fbt to that diode.. baka open na yan or change value


 isunod mo nmn ang yang 9v reg...

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by DJFEL on Fri Jul 12, 2013 1:43 pm

@ CRTboard:

200v pin = 105-110v
1000v pin = 80-110v 
G2 = 98-100v

ma baba lahat to sis...as-in...nasa mean board ang probs neto...pake chik lahat nang supply nang FBT neto sis at ok ba..nasa paliged nang FBT ang sira hola lang..

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by DJFEL on Fri Jul 12, 2013 1:48 pm

yong g2 neto nasa 400v to 600v...
yong 200 sem yong voltage nyan..
yong 1000 sem yong vontage ren..

pake silip yong 10 or 100 ohm at saka ecap nasa FBT neto nakakabet yata sa 200v...parang dyan ang probs..

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by ultrasonic™ on Fri Jul 12, 2013 1:51 pm

xa nga pala sis ts... bat 75-120v ang b+ mo ?
di ba xa stabled ?

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by DJFEL on Fri Jul 12, 2013 1:54 pm

ultrasonic™ wrote:masxadong mababa ang 1KV mo sis.. unahin mo muna yan... try mo nga direct sub ang resistor mo na 1K ohm 1/8w before mag fast recovery diode rgpxxx.. matotunto mo yan through col pin ng fbt to that diode.. baka open na yan or change value 

alarohen mo lahat dito sis..dyan dito ang probs sinabe ky master sis ultra..


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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by Lenaren on Sat Jul 13, 2013 3:45 pm

Master, lahat po ng voltages fluctuating....

May pinalitan me na resistor R898 2.2k... open sya... at ibang resistor na changed value sa paligid ng FBT but still no luck...

Mga anu-anong supply o load ang pwede kong-ihang sis para mahanap ang problematic load o mawawala ang panginginig ng voltages?

Voltage readings @ primary:

main e-cap -- 270 - 285v
pin 9 (str s6707) -- 5.8 - 6.8v
pin 1 (str s6707) -- 270 - 285v

Salamat...

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by Lenaren on Sat Jul 13, 2013 4:03 pm

Na-observe ko rin po na mainit ung heat sink ng 9v regulator at tda8375a na ic pag matagal na nakababad....



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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by ultrasonic™ on Sat Jul 13, 2013 4:54 pm

kng di mahawakan ng kamay ang heat sink sis.. di nga yan normal... try to isolate ang load ng 9V.. pero mwawalan ka ng oscillation.. yan kasi ang magsusuply sa jungle mo..

btw... yan bang 2.2k na open resist.. na nabanggit mo ay nka connect sa Col pin to FRD ?

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by DJFEL on Sat Jul 13, 2013 8:29 pm

May pinalitan me na resistor R898 2.2k... open sya... at ibang resistor na changed value sa paligid ng FBT but still no luck...

sa-an naka kabit yong r898...para ma sondan natenn..

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by Lenaren on Sat Jul 13, 2013 11:50 pm

Pati ung heat sink ng str-s6707 mainit din... hindi kaya pag medyo matagal ang paghawak...

nakakabit to sis sa pin 22 (ABL) at pin 50 (EHT/X-RAY) ng TDA8375A (IC300)...


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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by Lenaren on Sun Jul 14, 2013 12:52 am

Napansin ko rin master ung supply ng input pin ng PQ09RE11... kung mag-fluctuate man dapat aabot pa rin ng 11v dahil nakakonekta naman to sa SRT.... bakit kaya ganito lang supply nya?


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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by DJFEL on Sun Jul 14, 2013 6:46 pm

try ko mona silipen yong diagram neto..parang supply sira neto sa secondary supply...

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by Lenaren on Mon Jul 15, 2013 9:43 am

Question lang po.... ano po ba ung standard values ng resistances ng deflection yoke coils both H & V?...

... eto lang kasi ung na-read ko...
H-H --- 1.1ohms
V-V --- 8.9ohms

... normal lng po ba to sa sony tv.... sa sanyo kasi matataas ung value.... wala pa kasi akong ringer....

...try ko muna hang ibang load....

update ko na lang kayo soon!!!


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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by arkin on Mon Jul 15, 2013 1:57 pm

Very Happy lol! ..d pla nsend yong reply ko khapon via mobile:D uulitin ko na lng..chek yong yoke mo,bka my kunting tagas yan.my naincouter akong gito rin ang probz,ang salarin katiting na tagas sa yoke.magspark kc sya habang nag-oscilate.kya nagdrop yon volyages nya.@ts,hindi nkukuha sa ohmeter test ang kunting leak sa yoke.khit ringer pa gagamitin mo.high voltaage test talga klangan mo dyan pra mkita kong leak nga ba.

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by Lenaren on Tue Jul 16, 2013 8:20 am

@ sis arkin..... ganun ba sis:scratch: ... di mo pala pwede malaman kung shorted na ang windings.... paano ba to sis ginagawa?... mukhang mahirapan ako nito... newbie pa kasi...

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by DJFEL on Tue Jul 16, 2013 4:21 pm

pa ot dito..bakit hinde ako maka silip pang abot nang 3page...ano kaya probs neto..

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by Lenaren on Wed Jul 17, 2013 7:14 pm

Master pwde bang i-hang ang B+ pin ng FBT para ma-check ko din kung mawawala ang panginginig?....

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by arkin on Wed Jul 17, 2013 7:22 pm

pwde rin i-hang yan,no probz.pra machek mo rin kong stable ba b+ mo pag d nag-oscilate.about yoke testing,hanap ka dyan sa area mo ng nagtest ng fbt,at don mo pa test yoke mo..

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by wiljune on Thu Jul 18, 2013 7:50 pm

sa tingin ko parang wala pang oscillation ang fbt, base sa voltage mesurement ni ts. check mo mga zener diode TS.

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by DJFEL on Fri Jul 19, 2013 3:34 pm

Lenaren wrote:Master pwde bang i-hang ang B+ pin ng FBT para ma-check ko din kung mawawala ang panginginig?....


yap...hug mo B+ f stable ba..hinde ba mang up & down yong voltage..pang ok B+ hinde mang up & down yong vltge balik mo din yong vertical supply paki hug ren f sem risolta..

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by wiljune on Sat Jul 20, 2013 5:52 pm

sa mga na incounter kung ganyang trobol, kadalasan zener diode malapit dyan sa ic na smd na 4558 ata ang value nyan, parang 5.6 volts ata ang value nyan. try mong palaitan yan baka yan lang ang salarin.

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by danyenz on Mon Jul 22, 2013 12:36 pm

input ng 9v mbaba abnoy nga yan chek muna:) Smile Smile Smile Smile 

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

Post by ultrasonic™ on Mon Jul 22, 2013 5:43 pm

isolate mo muna ts ang mga nabanggit.. gaya ng suhisyon ni dadi dan.. pwde mo munang e float ang 9v reg... tignan natin kong titino nga ba ang input mo jan.. same with sis arkin - yoke, fbt. .dapat isolate ang mga yan at emonitor ang V.test.. jan kasi natin mlalaman kong saang area tlga ang ngpapacause ng heavy load

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Re: Help: Sony Trinitron KV-J21MF1 Blinking LED

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