Author Topic: jvc visible retrace line (Read 1714 times)

tech1 · « **on:** July 29, 2009, 10:38:04 AM »

mga sir patulong naman po.
hindi po nawawala ung retrace line
adjust ko ung screen sa flyback no effect.
tinanggal ko ung supply ng G2 sa crt no effect din po

Philippine Electronics Forum · « **on:** July 29, 2009, 10:38:04 AM »

Woots29 · « **Reply #1 on:** July 29, 2009, 12:31:31 PM »

picture tube

nga pala kung kinabit mo ba ung g2 wala kahit kunting epekto?

ilan ang voltahe sa B+ at sa mga cathode nya? (KR KG KB)?

Philippine Electronics Forum · « **Reply #1 on:** July 29, 2009, 12:31:31 PM »

sEPh · « **Reply #2 on:** July 29, 2009, 09:15:00 PM »

bro,paki check kung my 180v papuntang crt.kasi kung mababa,retrace lines lang tlaga lalabas.
check mo din yung capacitor na 250v malapit sa flyback,minsan yun nagiging dahilan...

Philippine Electronics Forum · « **Reply #2 on:** July 29, 2009, 09:15:00 PM »

tech1 · « **Reply #3 on:** July 30, 2009, 09:16:56 AM »

when I connect G2, no effect pa rin
B+ is stable at 120V.
But I notice something,when I try to adjust the
screen bias,ung voltage sa mga cathode follows
with the voltage of G2.
I already replaced cap. 10uf/250V

Grid-cathode short circuit?

Philippine Electronics Forum · « **Reply #3 on:** July 30, 2009, 09:16:56 AM »

Woots29 · « **Reply #4 on:** July 30, 2009, 09:38:40 AM »

eh may voltahe ba sa cathode nya, pakichek plis

disregeard mo muna G2

Philippine Electronics Forum · « **Reply #4 on:** July 30, 2009, 09:38:40 AM »

tech1 · « **Reply #5 on:** July 30, 2009, 10:26:55 AM »

nagbabago po sya when screen bias at flyback is adjusted.
D po cia fixed voltage.

Woots29 · « **Reply #6 on:** July 30, 2009, 10:54:29 AM »

ilan ang voltahe nung KR KG at KB?

para malaman natin kung panu pagkakapektu nya

Ikasamoko · « **Reply #7 on:** July 30, 2009, 11:02:40 AM »

Capacitors..hehehe...yung mga 250volts sa video ckt palitan mo...or yung ABL resistor check mo rin...

tech1 · « **Reply #8 on:** August 02, 2009, 02:09:23 PM »

sir,
may minute crack sa pcb,ung line papuntang cap. na 250v
di cia visible.voltage reading at the positive pin of cap. going to the cathode(kr,kb.kg)
varries when screen bias is adjusted,but voltage at diode going to cap. stable at 180 volts.

tnx to your help!

Woots29 · « **Reply #9 on:** August 02, 2009, 02:23:02 PM »

so solb na ba tv u?

tech1 · « **Reply #10 on:** August 02, 2009, 06:04:20 PM »

ok na ok na sir

tnx!

Woots29 · « **Reply #11 on:** August 03, 2009, 09:12:16 AM »

ayus! hehehhe

khabod · « **Reply #12 on:** August 07, 2010, 12:54:20 PM »

mga sir,

ung jvc tv ko din may retrace line din
san b makikita ung video ckt at ABL section?

NORTH LUZON · « **Reply #13 on:** August 07, 2010, 01:18:01 PM »

@khabod
hayjacker ka at pati dito nakarating kaulit
mas ok sis kung gawaka ng new thread mo at dun namin sasagutin yang problema mo
naghahahalo halo kasi ang balat sa tinalupan eh

Philippine Electronics Forum · « **Reply #13 on:** August 07, 2010, 01:18:01 PM »

Author Topic: jvc visible retrace line (Read 1714 times)

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