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Naw_S
Joined: 06 Jan 2006
Posts: 48
Helped: 13
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 27 Jan 2006 7:26 service mode tv national |
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| i repair a national tv set that had a vertical problem,there was a horizontal line on the screen,i change the vertical drive and output ic and there was some bad capacitor also,ther tv set worked but the image was orange red,i tried to adjust the R G B variable resister and the image became a little better,can anyone tell me how to make the image get its original color.
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bjeservice
Joined: 08 Jun 2005
Posts: 60
Helped: 8
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27 Jan 2006 17:46 h line problem in tv |
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| could you please tell us whats the model and chassis
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Naw_S
Joined: 06 Jan 2006
Posts: 48
Helped: 13
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27 Jan 2006 18:14 natiopnal tv repare tips |
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| Sorry i don't remember the model as i already return the tv set but it was an old national tv set.
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just4fun90
Joined: 02 Feb 2006
Posts: 4
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02 Feb 2006 6:16 TV repair problem,help plz. |
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| Do you replace color IC ? (LA72...) check the output to see what's the waveform look like. Use color bar signal genarator .
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Naw_S
Joined: 06 Jan 2006
Posts: 48
Helped: 13
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02 Feb 2006 11:39 TV repair problem,help plz. |
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| i don't have any color bar signal generator
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Google
AdSense
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02 Feb 2006 11:39 Ads |
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mrpandya
Joined: 19 Jun 2003
Posts: 13
Helped: 1
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05 Feb 2006 9:18 Re: TV repair problem,help plz. |
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dear friend, h-line and color problem can not be run same time, i am sure u have DEGUASSING problem, Deguass the tv set , if u have deguassing coin, I hope u can understand this.
regards
manoj
| Naw_S wrote: |
| i repair a national tv set that had a vertical problem,there was a horizontal line on the screen,i change the vertical drive and output ic and there was some bad capacitor also,ther tv set worked but the image was orange red,i tried to adjust the R G B variable resister and the image became a little better,can anyone tell me how to make the image get its original color. |
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sda
Joined: 22 Apr 2002
Posts: 117
Location: Greece
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05 Feb 2006 10:31 Re: TV repair problem,help plz. |
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As stated, it is a degaussing problem.
I think you either forgot to reconnect the degaussing coil or it was accidently disconnected during repair.
Or, a faulty PTC in the set.
regards
sda
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IQBAL KHAN
Joined: 29 Aug 2004
Posts: 61
Helped: 2
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23 Feb 2006 23:13 TV repair problem,help plz. |
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quite right
degaussing coil but check the cables also and replace the bad looking capacitors also check the voltages
which r feed to coil
regards
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mrpandya
Joined: 19 Jun 2003
Posts: 13
Helped: 1
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24 Feb 2006 18:33 Re: TV repair problem,help plz. |
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did u know the service mode for this chassis
if not tell me i wil informyou
regards
manoj
| Naw_S wrote: |
| i repair a national tv set that had a vertical problem,there was a horizontal line on the screen,i change the vertical drive and output ic and there was some bad capacitor also,ther tv set worked but the image was orange red,i tried to adjust the R G B variable resister and the image became a little better,can anyone tell me how to make the image get its original color. |
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Naw_S
Joined: 06 Jan 2006
Posts: 48
Helped: 13
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26 Feb 2006 18:42 TV repair problem,help plz. |
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| i don't know it service mode,its an old tv set i don't think it has a service mode.
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IQBAL KHAN
Joined: 29 Aug 2004
Posts: 61
Helped: 2
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07 Jul 2006 16:00 TV repair problem,help plz. |
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| yes old tv dont have service mode but do have shecking nodes of voltages also by inspection u can see the behaviur of circuit
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