Transcript Repair of television rectivier2009-07

REPAIRING RECEIVER
TELEVISION
REPAIRING RECEIVER TELEVISION SYSTEM
By Sarbini, S.Pd (SMK Muh 3 Yogyakarta)
TELEVISION TROUBLESHOOTING
EASY TRICK , ACCURACY IN REPAIRING
SYMTOM FUNCTION : see clearly the
symptoms of damage to the display / CRT
and then decide on the speaker location
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GEJALA KERUSAKAN TV
1. OFF TOTAL
CHECK :
 Power (input / output regulator ) Output
voltage: 115V, 24V, 12V, and 5V
2. TV, LED INDICATORS OFF, SOUND
GOOD, VIBRATION SWITCHING
TRANSFORMER
CHECK :
 Horisontal block (flyback trafo, horisontal
transistor and capacitor)
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3. ON LED INDICATOR, TV CAN’T
BE OPERATED
CHECK :
 Horizontal series.
 Regulator series (dioda voltage devider)
4. THERE IS’T RASTER,SOUND NORMAL
(screen remains dark )
CHECK :
 Video amplifier series
 Light amplifier series
 High Voltage Series
 CRT
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5. ONE RASTER LINE HORISONTAL
CHECK :
 Vertikal series and oscilator.
 Vertikal deflection series
6. THE STRIP STRIP ON THE SCREEN
AND IS NOT LOST
CHECK :
 Horizontal osilator series (dry ELCO)
 Components that have been eaten
accidentally age (the new TV models are
rarely found)
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7. THE IMAGE HORISONTAL SHIFT
CHECK :
Sinkronisasi series
Video buffer series
AGC series (ELCO usually dry or
leak dioda )
8. THE IMAGE VERTIKAL SHIFT
CHECK :
o Vertikal osilator (New series TV
caused is leak ceramic capacitor)
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9. IMAGE NARROWS
CHECK :
Catu daya output series
Horisontal defleksion series
Deflektion yoke
10. LAYER SHORT
CHECK :
o Vsize and Vline Potensiometer
o Vertical defleksi series
(transistor).
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11. HORIZONTAL DILATION
CHECK :
 Potensio checker wide horizontal
 Power Supply series
 Voltage anoda CRT
12. CAPTURING VERTICAL SWEEP
CHECK :
 Vertikal deflection series
 Potensio checker vertikal
 Dry elco
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13. IMAGE CONTRAST LOW
CHECK :
 series of mixer until video amplifier
series
14. SHOW A FRWARD SLASH OR A NET
PATTERN ON THE IMAGE
CHECK :
 The cause of interference from outside,
(near to the radio transmitter) Keep the
antenna is the source of the
interference frequency
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15. The TV IMAGES BLUE / RED /
GREEN / Cyan / Yellow
CHECK :
 RGB Matrics series (value
increase resistor / transistor
damaged), try to set the VR on
the RGB or CRT.
 Dry Soldering
 CRT
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TABEL OF TELEVISION TROUBLE
N
O
TROUBLE TYPES
CHECKING PARTS
1
Good picture, no sound
Series of audio between
the IF and the audio
speaker
2
Image on the screen is still
not clear but the color, sound
normal
A series of video
detector is broken.
3
Image on the screen rolled up
to the middle horizontal axis
direction; normal voice
Vertikal series, ussualy
capacitor
4
Image on the screen and
colour is not clear, sound
normal
Video amplifier is
broken,ussually
transistor.
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TABEL OF TELEVISION TROUBLE
NO
TROUBLE TYPES
CHECKING PARTS
5
Image on the screen black
and white; normal voice
Brace color damaged,
usually transistor.
6
Image on the screen is
broken; normal voice
Final amplifier is broken
7
Raster have pitted, missing
images and sound sing (lost).
Series tuner have a
damaged set of AGC
does not work
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REPAIRING STEPS
 Trouble of TV must be correct
 Estimating the damaged block is based on trouble
 Divide the block is broken, so that search easier
trouble
 To more easily in search of damage to the TV,
 We must understand the symptoms of damage on
each block.
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