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Anonymous Posted on Sep 23, 2015

Chassis cp 79b lg tv bord on but go to sut down eht but audio ok chanal ok no vartical volt +14 -14 crt volt 200 Tv is on poition

1 Answer

The Knight

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  • LG Master 76,851 Answers
  • Posted on Sep 23, 2015
The Knight
LG Master
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Joined: Oct 14, 2010
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Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. 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, to get gathered some pages which has the details of practical experiences to the author of that site.

5 Related Answers

A

Anonymous

  • Posted on Jun 23, 2008

SOURCE: rca 32v524t chassis-atc010a

replaced,off/on vol,up and down,and channel up and down.

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Anonymous

  • 125 Answers
  • Posted on Aug 06, 2008

SOURCE: LG CRT HDTV Dead no picture

if you have the b + acording the manual then you loose it
could be many things like the vert. circuit, the crt itself or
the flyback,

Anonymous

  • 252 Answers
  • Posted on Oct 10, 2008

SOURCE: SANYO TV MODEL CM20SP8S CHASSIS AC3-A20

try to fine tune your tv using the remote control, or, if you had knowleged in electronics adjust the sound IF transformer using a wood stick or plastic don't use a metal in adjusting the IF

bhatgiri73

Girish Bhat

  • 106 Answers
  • Posted on Jan 22, 2010

SOURCE: LG CRT TV, picture becomes yellowish

yes it is due to dry solder in vedeo driver section(a board fixed to the pict-tube.).

bhatgiri73

Girish Bhat

  • 106 Answers
  • Posted on Mar 22, 2010

SOURCE: Sanyo TV Chassis Series AC5-C20 no sound

check power supply to ic,, it will be 12v from smps..may be fusable resistor has gone

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0helpful
2answers

Lg 21 inch platron crt tv eht high ocilates,110 volt ok ,dt changed

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. 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. 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 the home page, to get gathered some pages which has the details of practical experiences of the author of that site.
0helpful
1answer

In lg tv using cp 79a chassis eax35112303(4)picture comes only top on the portion aproxemately 4" remaining portion of the crt blank

Check and replace the vertical scan output IC. Check the vertical scan winding of the deflection yoke for open circuit.
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/
0helpful
1answer

My lg colour tv power supply is ok but no eht genrate i will allready change the chroma ic tda8362 but problems is same

my hyndai colour tv power supply ok, but it power indicater is not woking and tv is not switching on
0helpful
1answer

When I turn on my TV I have sound but no picture

ths is a coman problum in tv it is a two type of problum solonution
[1]check filament voltage on crt base and check filament is on if not then Resolder filament ragistance or replace with new
IF filament is OK then ......
[2] check screen voltage hight more then normal and see the screen H line on the screen then problum is vartical section then check or replace capaceter /registance /vartical IC
0helpful
1answer

Sony wega crt tv wont turn on red light flashes 7 times thats it

this problum is inside of tv-set
pls. check output voltage from EHT any one output daiode is sort /or open then check and replace with new
if ok then eht screen voltage reset from eht screen preeset and check h- line or blanck rester light
if H-LINE then check vartical B+ voltage /replace vartical ic. or capaciter
0helpful
1answer

Rca truflat tv goes blank after 30 minutes, then I can't get a

When this goes off is there a loud crack? If so perhaps the B+ supply is increasing increasing the the EHT to the CRT and the crack is the voltage across the spark gap in the crt base jumping to chassis/earth shutting down the TV. Or perhaps just a dusty/dirty eht cap, again EHT discharge, or could be a eht tripler being faulty. Further investigation with the aid of a service manual is required I am afraid.
0helpful
1answer

No picture

Hi.

Look on the rear of tv set to see if there is a chassis number it normally starts ICC


http://dysonmanuals.inc.io/

Chris
0helpful
1answer

TV PROBLEM

IN MY 230 CHANNEL TOSHIBA KIT WHEN IT IS ON THE 110 VOLTS IS OK. BUT AFTER FEW SECONDS ITS 110 VOLTS BECOME ABOUT 91 VOLTS.WHEN THE VERTICAL SUPPLY RESISTANCE FROM THE EHT,THE VOLTAGE BECOME 110 VOLTS.EHT AND TDA 7698 ARE OK.
0helpful
1answer

Faulty TV

check the ABL at the flyback. sould be at least 185+ volts on the G2 at the crt socket
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