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Sir, i have onida 21ky thunder series color tv. the set is dead and i have checked the voltage on str 6456 driver voltage its ok , then opto coupler voltage its ok but it it has no output kindly help me

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  • Televison & ... Master
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Check all the other components in the power supply section.

Posted on Nov 29, 2012

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: onida stand by problem

sir my onida tv 21'' ineed un lock

Posted on Nov 20, 2008

badperiyac
  • 52 Answers

SOURCE: Onida TV service code needed

press disp+vsm together here it opens service menu at last of that menu there is restore option press 1 to INT . press 1 and your tv will restore.

Posted on Aug 11, 2009

  • 1 Answer

SOURCE: onida ky oxygen thunder (DVMC) service menu code

to open service mode press vsm and display from remote.

Posted on Sep 23, 2009

  • 301 Answers

SOURCE: the tv is completely dead.

there may be some bad capacitors in the primary of the power supply. do you get any led lights the front? most polaroids will have a red led on the front if the standby supply is good. there will most likely be some smaller caps 47mf@50v 10mf@50v probably that value that are bad.

Posted on Dec 17, 2010

caroldon
  • 17129 Answers

SOURCE: my onida 21" black color

Possible there is a fault in soldering. Poor joints in the CRT base circuit of the CRT tube will result in poor connection after some use due to the fact the heating and cooling will detach off the leads. So use a good soldering iron to touch up all the points in your main board and the CRT board and it must work provided your tube is not faulty.

Posted on Feb 07, 2011

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1 Answer

In onida ky thunder strf6654 getting burn,fuse blown when also change of str.????


Check all the associated components at the power supply regulator section circuit; especially check the zener diode/s. Replace them. Replace the STR only after replacing these components. There is a chance to these components too can damage, when the original STR has burned out by any reason. If you wish to get more, about the schematic diagram; check the site linked here. Type in the number of STR in its search box, or Pull up previous posts, either by type in the Brand name to your set in its search box, or view it in Mosaic / Timeslide / Flipcard option. http://electronicshelponline.blogspot.com/

Aug 06, 2013 | Televison & Video

1 Answer

I have sony trinitron wega t.v and when i plug in to switch on.. Light does not come, no sound. Nothing. is it repairable.


hi,
yes , it is reparable. ur tvs smps power supply have some problem. check th fuse first. also check the over surge protector MOV is short or not. also check the STR power drive in the power supply. just relapse. below is the photo of MOV and STR. if u repalce the STR also try to replase the opto coupler also. added the photo of opto coupler.
ok

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Jan 06, 2011 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Power supply problem in matsui tvr180, in STR section, can u please suggest me the circuit diagram to rectify my problem


The power supply, from memory, uses an STR type power supply chip and is controlled by use of an opto coupler.
In my experience the opto couplers hardly ever give trouble, nor the STR's if caught in time.
Change the capacitors around that part of the board within the hatched area especially look out for 22 or 47uF 35 Volt start up capacitor.
Hope that helps but the models changed from week to week depending on which factory the ubits came from.

Jan 01, 2011 | Televison & Video

1 Answer

Enter main220v str6707 shart


hi,
when u replace the str 6107 along Whit it ,replaced the opto-coupler, the polistor , ceramic capacitors in the str side. mainly that one connected to is pin 3.
on the out put side replace the SE1XX voltage controller also.
ok

Dec 22, 2010 | Sony FD Trinitron WEGA KV-36FS120 36" TV

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My tv tries to turn on but shuts right back off


SMPS circuit problem Check the SMPS . Replace opto couplers.

Do not switch ON TV without opto coupler in circuit. SMPS will go out of control and the + DC voltage will raise and spoil the circuits.

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Tv turns itself off after turning it on


Check SMPS circuit.
Check for dry capcitors. Replace OPTO coupler in the feed back circuit in SMPS.

Do not switch ON TV without opto coupler fixed in circuit.

SMPS will go out of control and the + DC voltage will raise infinitely and damage the other parts. If transistors used along with the opto coupler, check them for leakage. Replace them. Otherwise the replaced opto coupler may fail again after few days or few hours of TV working.

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it was not necessry to replace so many parts if you go as per proper procedure.please proceed as 1 isolate horizontal output section from power supply & make power supply ok. 2 if it becomes ok check hor osc,driver&h/output section. 3 if it is ok connect power input to hor.section which was isolated. 4 check for loose contact or print. 5 put on tv .

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