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sony tv kv29st70..picture does'nt show up..

 
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andro25
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PostPosted: Sat Jan 22, 2005 3:21 pm    Post subject: sony tv kv29st70..picture does'nt show up.. Reply with quote

the picture only shows up after waiting for a period of time even when only changing channels but there is sound, what could be wrong im just a newbie on fixing tvs can you help me ..thanks Smile
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md60



Joined: 20 Jan 2005
Posts: 2
Location: Southeastern Ohio

PostPosted: Sat Jan 22, 2005 7:47 pm    Post subject: Reply with quote

Common problem with Sonys is the IF module, small metal box usually close to the tuner. Check solder connections where it connects to board, also these have been notorious for bad internal connections, you'll need to pull the module out of the main board, pop the covers, and use a small low-heat iron to go over the connections.
Other components to check for loose joints are AFT transformer T203 and delay line DL302.
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PostPosted: Mon Jan 24, 2005 11:22 pm    Post subject: re; Sony Reply with quote

Hi, might also be IK circuit, try turning up G2/Screen control just a little to the right,
Larry E
American TV & Electronics
Crystal River, Fl.
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alwyn
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PostPosted: Wed Jul 18, 2007 9:13 am    Post subject: Re: sony tv kv29st70..picture does'nt show up.. Reply with quote

Trace back the flyback secondary supply voltage. also check the your heater.
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