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  Height Less Picture Fault TV Receiver

Rectification of the Height less Picture Fault and Operation of a TV Receiver:

To rectify the height less picture fault and operate the TV Receiver.

Components Needed:

S. No.

Name of Component/Apparatus

Quantity

1.

2.

TV Receiver

Multimeter

1

1

Identification of the fault in the given TV receiver:

1. The TV receiver is switched ON firstly.

2. The picture displayed in the screen is height less.

3. Switch OFF the receiver directly and verify the fault is in the vertical stage.

Check the stages of the TV receiver:

1. Height less picture on the screen verifies the fault is in the vertical stage.

2. Calculate the voltage at the Vertical stage. If it is correct,

3. Adjust the vertical height control preset if there is no alteration in the picture height,

4. Test the condenser connected series to vertical deflection yoke coil if it is correct

6. Test the transistors, condensers and resistor connected at vertical output stage if it is correct,

7. Calculate the voltage at IC pins connected in the vertical output stage. If the voltage is low eliminate it and solder the new one.

8. Switch ON the TV receiver. The picture on the screen is in usual height.

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