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Equipment Repairs => CRT TV forum => Topic started by: LLADOP on January 29, 2008,18:04:16

Title: SONY KV-2584(BE-3B)
Post by: LLADOP on January 29, 2008,18:04:16

HI ALL!    my sony tv has this problem.
black screen with one white line at the top of screen, sound is ok, tunner is ok,and when i go to menu i see the menu ok, but overlay on black screen with the white line at the top of screen. (horizontal and vertical is ok. I have replase the STV 9379, but nothink.)
please help.

Title: Re: SONY KV-2584(BE-3B)
Post by: Tmg on January 29, 2008,18:38:21

Hi can only suggest try heating any capacitors near frame ic and change them

Title: Re: SONY KV-2584(BE-3B)
Post by: LLADOP on January 30, 2008,15:31:25

THANKS TMG,
BUT WHERE IS THE FRAME IC, AND REMEMBER THAT THE MENU LOOKS OK BUT NO PICTURE BEHIND THE MENU. ONLY ONE WHITE LINE AT THE TOP OF BLACK SCREEN.

Title: Re: SONY KV-2584(BE-3B)
Post by: ernie on January 30, 2008,17:50:43

the stv 9379 is the frame ic check for any loose joints also is your st/by light flashing any set amount of times when on

Title: Re: SONY KV-2584(BE-3B)
Post by: Κώστας on January 31, 2008,02:43:59

Service manual for BE-3B :
http://www.tv.quuq.org/forum/index.php?topic=723.0;topicseen

Title: Re: SONY KV-2584(BE-3B)
Post by: P.R.Gore on February 02, 2008,13:50:35

Check components at pin 6 of connector CN702 of crt pcb. It is connected to pin 30 of jungle IC 301. A term called black current is sensed through this pin. If voltage at this pin goes beyond threshold screen goes blank! Also check flyback pulse at pin 58. Low amplitude of this pulse causes screen to go blank!!