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  Defects Occurred Television Receiver

Defects Occurred In Television Receiver

Several defects which may take place in several stages of a television receiver are given below.

There are 6 types of defects occur antenna stage and tuner

A.  Noise only, Snow only;

B.  Noisy sound, Snowy picture;

C.  Mismatching of audio and video

D.  Venetian lines

 E.  Ghost image

F.  Only few channels received

There are 4 types of defects occur video if stage

A.  Noise only, Snow only;

B.  Noisy sound, Snowy picture;

C.  Only Plain raster; No Program sound

D.  Negative picture

There Are 6 Types of Defects Occur In Agc Stage

A.  Noise only; Snow only;

B.  Noisy sound; Snowy picture; Noisy sound

C.  Mismatching of video AND audio

D.  Overloading

E.  Negative picture

F.  No Program sound; Only Plain raster;

There Are 6 Types of Defects Occur In Video Amplifier

A.  Sound OK, Dark picture;

B.  No raster (light) on the screen; Sound OK

C.  Retrace lines only; Sound OK

D.  Picture with retrace lines; Sound OK

E.  Poor contrast or dim picture

F.  Smeared picture

There are 8 types of defects occur in picture tube circuit

A.  Dark picture; Sound OK

B.  No raster (light) on the screen; Sound OK

C.  Out of focus

D. Poor contrast or dim picture

E.  Retrace lines only; Sound OK

F.  Picture with retrace lines; Sound OK

G.  Silvery picture

H.  Switch off spot

There are 11 types of defects occur in horizontal sweep section

A.  Horizontal Sync. Loss

B.  Dead Fault

C.  Horizontally nonlinear picture

D.  Vertical line only

E.  Horizontal keystone

F.  Blooming of picture

G.  Breathing effect

H.  Horizontal Fold over

I.  Width less

J. Ringing

K. Mirror image

There are 7 types of defects occur in vertical sweep section

A.  Horizontal line only

B.  Cinemascope picture

C.  Vertical Sync. Loss

D.  Vertically nonlinear picture

E.  Vertical keystone effect

F.  Vertical Jitter

G.  Picture upside down

There are 7 types of defects because of magnets used in yoke section

A.  Picture is not in centre

B.  Pincushion effect

C.  Barrel shaped raster

D.  Neck shadow

E.  Tilted picture

F.  A bright spot only, at the centre of the screen

G.  Bend in the picture at the corners of the screen

There are only one type of defects occur in the sync. Separator stage

A.  Total Sync. Loss

There are only 1 type of defects occur in the differentiator circuit

A.  Horizontal Sync. Loss

There are 2 types of defects occur in the integrator circuit

A. Vertical Sync, loss

B. Vertical jitter

There are 6 types of defects occur in the power supply

A. Dead fault

B. Shrunken raster

C. Hum bars and Hum in sound

D. Wavy picture

E. Picture rolling and wavy

F. Width less picture

There are 6 types of defects occur in the sound section

A. No sound; Picture OK

B. Sound bars in picture

C. Low volume

D. Distorted Audio

E. Hum in sound

Noisy audio (Buzz in sound); Picture OK

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