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REPAIRING RECEIVER TELEVISION
REPAIRING RECEIVER TELEVISION SYSTEMBy Sarbini, S.Pd (SMK Muh 3 Yogyakarta)
Teknologi dan Rekayasa
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
Teknologi dan Rekayasa
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)
Teknologi dan Rekayasa
3. ON LED INDICATOR, TV CAN’T
BE OPERATEDCHECK : 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
Teknologi dan Rekayasa
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)
Teknologi dan Rekayasa
7. THE IMAGE HORISONTAL SHIFTCHECK :
Sinkronisasi seriesVideo buffer seriesAGC series (ELCO usually dry or
leak dioda )
8. THE IMAGE VERTIKAL SHIFT CHECK :
o Vertikal osilator (New series TV caused is leak ceramic capacitor)
Teknologi dan Rekayasa
9. IMAGE NARROWSCHECK :
Catu daya output seriesHorisontal defleksion seriesDeflektion yoke
10. LAYER SHORT
CHECK :o Vsize and Vline Potensiometero Vertical defleksi series
(transistor).
Teknologi dan Rekayasa
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
Teknologi dan Rekayasa
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
Teknologi dan Rekayasa
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
Teknologi dan Rekayasa
TABEL OF TELEVISION TROUBLE
NO
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.
Teknologi dan Rekayasa
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
Teknologi dan Rekayasa
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.