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  Retrace Line Fault TV Receiver

Rectification of the Retrace Lines Fault and Operation of a TV Receiver:

To rectify the retrace lines fault and operate the given TV Receiver.

Components Needed:

S. No.

Name of the Component/Apparatus

Quantity

1.

2.

TV Receiver

Multimeter

1

1

Identification of the fault in a given TV receiver:

1. The TV receiver is switched ON firstly.

2. There is no picture just only retrace lines on the screen.

3. Switch OFF the receiver instantaneously and verifies retrace lines fault is in the receiver.

Check the stages of the TV receiver:

1.  There is no picture just only retrace lines on the screen.

2.  Test the video output transistor and related parts and calculate the voltage if it is correct. Calculate the voltage at picture tube grid G1 and G2, if it is correct,

5.  Test the picture tube filament and cathode if it is short circuited eliminate it with appropriate way.

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