Question about Televison & Video
Your TV has no video input to feed its video output section. The video output secction, usually built to the picture tube neck board, otherwise known as base card. you just measure the voltages at the base of green, red and blue output transitors on the base card. In this case the voltage may be abnormal. The normal voltage leve should be between 2VDC and 3.5VDC. If these voltages are correct, check the video output transistors on the abse card for any leak. If all are found Ok, the fault is related with the chroma section decoder Ic on the main board, and shoud be replaced with same type and number. This is a normal fault to most of the colour tVs.
To replace the chroma Ic, you should have a good concept of desoldering and soldering. There will be more that 52 pins to be desodered and resolderd. Ok
Posted on Nov 21, 2010
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Posted on Jan 02, 2017
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