SONY KV-HF21N70

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SONY KV-HF21N70

Post by Hertz on Fri Aug 27, 2010 10:38 pm

mga master patulong ang problema wala siyang White sa screen...parang ABL ang sira pero nacheck ko na ang abl circuit pero di ko makita ang sira. ang R-G-B cathode voltage po niya is approximately 100vdc, that I think is normal. G2 voltage vary from 200v to 400v when I adjusted the screen control at the back of the flyback transformer. Any idea? TIA

Eto Po ang screenshots:



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Re: SONY KV-HF21N70

Post by Hertz on Fri Aug 27, 2010 11:00 pm

Reply by oscar on April 12, 2010 at 1:07pm
master hertz nagpalit na ba kayo ng capacitor sa ABL circuit ?
nakasubok na kasi ako ng ganyang sira kaya lang sharp ang brand nun
baka pareho
Reply by Electro on April 12, 2010 at 4:16pm
master hertz kong napulihan na nimo ug ABL capacitor, basig nagchange value ang ABL resistor

nakatry na pud ko ug in ana
paki check daw master

Reply by popckl on April 12, 2010 at 8:48pm
master kng wla kay makita sa ABL section or sa jungle section try nmo replace ang crt

murag naka repair npud ko ana nga trouble

Reply by hertz on April 13, 2010 at 9:01am
@popckl defective CRT or picture tube ? mukhang malabo kasi SONY ito baka sa ibang brand pwede pa, meron kasi itong IK return circuit for balancing the three gun assembly.. pagmahina kahit isang gun sa kanila magvi-video black ang picture tube at merong good sound

napalitan ko na rin ito ng crt socket pero wala pa rin


@Electro nasubukan ko na rin magpalit ng abl resistor pero wala pa rin

@oscar nasubukan ko na rin yan, magpalit ng ABL capacitor 22uf/160V pero no effect pa rin


@all salamat sa mga nagreply double check ko na rin ulit

Reply by Piezo on April 13, 2010 at 10:53am
@HERTZ TRY RESETTING THE EEPROM
LOOK FOR THE ABL SETTING VALUE
Reply by hertz on April 13, 2010 at 10:57am
oo nga pala settings ng eeprom
hindi ko pa natignan

sir Piezo papano pasukin ang service mode nito ?
Reply by Piezo on April 13, 2010 at 11:04am
HONESTLY I DON'T KNOW HOW
TRY TO CONTACT SIR ULTRASONIC FOR THIS
I THINK HE KNOWS
Reply by hertz on April 13, 2010 at 11:18am
nako suspended pa naman ngayon si sir ultra
try ko na lang siya i text kong papano

balitaan ko na lang kayo mga master kong papano
salamat
Reply by oscar on April 15, 2010 at 11:52am
@master hertz sa akong nahibal-an kinahanglan ug Sony service remote
i press lang ang service mode button ingon sa akong teacher sa una
ambot lang kong tinuod kay wala pa pud ko ka try ana

Reply by hertz on April 18, 2010 at 4:43pm
@oscar may tama kayo kailangan nga ng remote control
ito ang sequence to enter service mode while naka standby ang tv press DISPLAY, 5, VOL + at POWER sa remote control
salamat kay sir ultra nagreply agad sa cellphone nalaman ko tuloy kong papano ang tamang procedure
at suabe pa sa alright na solve agad ang problem ng TV ko

ito na ang result:




procedure na ginawa ko
Habang nasa Service Mode ang tv, in-adjust ko po isa-isa ang mga item sa service mode hanggang sa makarating sa ITEM #13 na YUV. In-adjust ko yung YUV DATA from 00 to 01

ito iyon:




Reply by hertz on April 18, 2010 at 4:59pm
@sir ultra maraming salamat
forward ko sayo ang mga image para kayo na lang ang gumawa ng tutorial thread dito
hindi kasi ako sanay

@sir piezo, oscar, Electro, at popckl salamat din sa inyo
salamat sa mga ideya

Reply by mayalin143 on April 19, 2010 at 10:37am
iTo paLa Ang SinAsAbi Ni SIR uLtrA
nApAkAHaLaGA tALagA nG sERviCE mOdE

Reply by oscar on April 20, 2010 at 4:03pm
galing mo master hertz buti pa kayo nakasubok na ng ganyan

marami nga akong matututunan dito

Reply by Electro on April 22, 2010 at 1:06pm
galing ng thread nato very informative

@master ultrasonicâ„¢ tutorial naman po ?

Reply by ultrasonicâ„¢ on July 24, 2010 at 6:16pm
ito na yung utang kong tutorial

SONY SERVICE MODE

naway makatulong yan dito

Reply by Electro on August 4, 2010 at 10:53am
@master ultrasonicâ„¢ salamat sa tutorial

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mahina na tube mo tol rejuvinate mo..

Post by nelok28 on Sat Oct 15, 2011 5:46 pm

Hertz wrote:mga master patulong ang problema wala siyang White sa screen...parang ABL ang sira pero nacheck ko na ang abl circuit pero di ko makita ang sira. ang R-G-B cathode voltage po niya is approximately 100vdc, that I think is normal. G2 voltage vary from 200v to 400v when I adjusted the screen control at the back of the flyback transformer. Any idea? TIA

Eto Po ang screenshots:



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Re: SONY KV-HF21N70

Post by samiel on Sat Oct 15, 2011 9:26 pm

delay line problem mo nyan...nakita mo ba yung kulay itim na malaki 5 pins ata yun malapit sa jungle ic,tanggalin mo yan at buksan mo,resolder mo yung mga chips sa loob lahat na maliliit sa loob....f ganon parin...palitan mo na ,resolder mo narin jungle ic pati yung switching ic....wag mo munang galawin service mode....yun ang laging naincounter ko sa ganyan model when i was in service

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Re: SONY KV-HF21N70

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