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Panasonic TC20L3T, tick tick sound inside & no pic &
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ty
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PostPosted: Wed Jul 06, 2005 6:26 pm    Post subject: Panasonic TC20L3T, tick tick sound inside & no pic & Reply with quote

I had a panasonic TV , model TC20L3T. Powe is ok & the power led is normal (red ) , but when turn on there is no picture & no sound, Just fast tick tick sound inside the Tv. and when u increse the volume the tick tick sound increases & when u decrease the volume the tick tick decreases. Help plz
ty
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PostPosted: Fri Jul 08, 2005 2:10 pm    Post subject: Reply with quote

help plz
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PostPosted: Fri Jul 08, 2005 2:11 pm    Post subject: Reply with quote

help plz
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Al_Dodge_Bundy



Joined: 05 Apr 2005
Posts: 93
Location: Netherlands

PostPosted: Sat Jul 09, 2005 4:15 am    Post subject: Reply with quote

There could be a short on the mainboard.

Try to measure if there is a short on e.g. the high voltage transitor.

If not, check the secundairy voltages, to see in what circuit the short is?

Grtz Mark
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PostPosted: Sun Jul 10, 2005 5:59 pm    Post subject: Reply with quote

what faults can make the tv like that?
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ty
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PostPosted: Tue Jul 19, 2005 5:16 am    Post subject: Reply with quote

what i have to check mainly & what are the main problems for that kind of fault.
ty
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Al_Dodge_Bundy



Joined: 05 Apr 2005
Posts: 93
Location: Netherlands

PostPosted: Tue Jul 19, 2005 6:21 am    Post subject: Reply with quote

I would start by checking if there is a short on the mainboard, by checking if the high voltage transitor (HOT).

Do you have any experience in electronics?
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ty
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PostPosted: Tue Jul 19, 2005 7:33 am    Post subject: Reply with quote

is the high voltgae transistor means the horizintal transistor ??
and how do i have to check between the leads ( Base, emitter & collector ) ?
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Al_Dodge_Bundy



Joined: 05 Apr 2005
Posts: 93
Location: Netherlands

PostPosted: Tue Jul 19, 2005 11:37 am    Post subject: Reply with quote

Yep!

First check if there is a short between the collector and emitter.

(The "short" (low resistance) between base and emitter is "normal", there is a small trnsformer between them.)
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PostPosted: Wed Jul 20, 2005 5:11 pm    Post subject: Reply with quote

ok i will do that. But i took out the transistor from the board & switch the tv on & the fast tick tick sound is still there. does this means the problem is in another ? anyways i will check the transistor. but give me some idea about that.
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