[SOLVED] problem in samsung crt tv

[pradeep.g.belchada]

hello, i have a problem in samsung crt tv

tv starts picture comes for 10 minutes , suudenly tv h synch loss appears, some tee sound ( like buzzer) comes from fbt . tv stops i mean
h-o/p stops. i changed fbt, o/p transistor, damper cap then also the same problem. tv model samsung plano 21 , ic used tda 9381

schematic below

 

[kabeer02]

change the line transformer then..

 

[pradeep.g.belchada]

i mentioned in the above post that line transformer (fbt) is replaced , yoke also replaced then also tv shuts down , when i remove yoke conector , h- section works

 

[kabeer02]

How many volt did you see at the horizontal drive?

 

[pradeep.g.belchada]

normal 125v, but when ringing sound comes from eht voltage increses to 137v

 

[nnaveli]

i had that prob with plano and sansui sets mostly that fault attacks flat screens,i am not sure which coil is exactly affected but i think is the horizontal ,just change the Scan Coils.