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China TV burns ic LA78040 when I switch TV on,what is the problem if I may ask.

Posted by Tebogo Mahlwane on

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Andrew Taylor

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Any other faulty voltage management component or faulty diode on that made in China board. A new set would be the best option. You can't fix junk like that.

Posted on Jul 09, 2020

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gopakumarg43

The Knight

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SOURCE: China colour kit using 6pr6 processor ic,in this circuit vertical ic LA78040 is burn

It can be replaced. . Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
Type in this key phrase " my service table today " in the search box at the top right of the display window of the home page, to get gathered some pages which has the details of practical experiences to the author of that site.

Posted on Jan 25, 2016

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1 Answer

China colour kit using 6pr6 processor ic,in this circuit vertical ic LA78040 is burn


It can be replaced. . Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
Type in this key phrase " my service table today " in the search box at the top right of the display window of the home page, to get gathered some pages which has the details of practical experiences to the author of that site.

Jan 25, 2016 | Televison & Video

1 Answer

How do I fix 4 inch vertical line on my t.v?


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to TV screen are given with illustrations. You can get an idea about the fault to an extent.

Apr 01, 2015 | Sanyo Televison & Video

1 Answer

Why appear blue and black lines on my tv screen?


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Feb 11, 2015 | LG Televison & Video

1 Answer

Where is horizontal scan out put section?


Hi Majid
Just contact any service technician to repair your TV. It will be best for you.
Gopakumar Gopalan Google

Feb 01, 2015 | Televison & Video

1 Answer

Where is horizontal output ic in my t.v?


There is no horizontal oscillator IC. The horizontal oscillation is generated and outputted by the main system control IC LA76810 itself. Refer some circuit diagrams using LA76810 to get more details about the horizontal oscillation output from the IC. Measure the frequency at that output pin. It should be some ever near 15.62KHz.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Type in the IC number, in the search box [at the top right] of the display window, and press enter to get all related posts. It will make surf easy.

Jan 31, 2015 | Televison & Video

2 Answers

Why come white vertical line on my t.v screen in center?


You said "I checked vertical output line from main ic pin 23 found correct"

But the problem is "Horizontal Output Line" Try that.

Jan 29, 2015 | LG Televison & Video

1 Answer

Why comes white vertical line on my t.v?


Horizontal scan output fault. Check the connections to the deflection yoke from the main board. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Jan 27, 2015 | LG Televison & Video

1 Answer

How to fix the problem of no light in a chinese kit


Check and replace the damaged component/s at its main board. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Sep 01, 2014 | Televison & Video

2 Answers

BPL i short model television it's using La76931 ic problem is single horizandal line i cahange la78040 vertical ic but not cure.


Did you check if 24v supply is coming to the chip ( through a fusable 10 ohm resistor ) ?.Look for dry solder on the sync chip ( 24 pin or 40 pin IC ).

Mar 11, 2011 | Televison & Video

1 Answer

Thin Horizontal line through tv blank screen.


Replaced vertical IC ( la78041 ??>.. Or La78040 ). Look for born resistor beside IC. Replaced capacitor 100uf 35V too!!! Good luck !!

Nov 08, 2007 | Insignia NS- 27" TV27 TV

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