POLYTRON Blangking Screen

Finally I fix the TV brand is damaged protect Polytron. Some day I met yesterday at the Television Polytron classical damage again, damage to the TV this time was accompanied by TV images of white blanking die / protect
In When in on his white screen TVs arise on TV and then die terprotek to avoid damage to the tube, possibly on the old TV production like this damage will not cause any protected so that should not be too long in turn.
It turned out that after checking the damage is in RGB amplifier, the voltage measured at the IC TDA 6107 is very small <10V. Having traced one resistor 1 ohm 1 watt off, I forget the location hehehe
Burned / rupture was caused by shortnya IC IC TDA 6107, so the replacement ICs and resistors should be in unison
I also used to find the Samsung TV with similar damage, accident type RGB amplifier IC was also the same which TDA 6107 but that time is generally only 1 watt resistor on the PCB CRT are short or zenernya diode section only, but still recommended to ensure your damage should first check the condition of the RGB amplifier IC by measuring the resistance at each IC pin.

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Batal

Simak

IC TDA good when measured at the input pin RGB (1,2,3) and RGB output pins (7,8,9) and the pin 6 as the main supply should not be short, if one leg is short then there could IC is rusak.Untuk more details you can see in the picture.
Blangking Damage like this is also not only be caused by a circuit on the PCB CRT but may also be caused by damage to the tube, to ensure the tube is still functioning well please see the article here.

Source : infoservicetv

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