Guigang TCL TV after-sales repair hotline {{official website}} Welcome⌒

Guigang TV after-sales repair phone number official website}} Welcome⌒
Guigang TV after-sales repair phone number:, call our customer service hotline: we will serve you at the first time
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Guigang TV after-sales service outlet repair hotline: dedicated line to serve you at home, TV repair situation in Guigang City
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Repair telephone hourly repair hotline: Brand (Guigang) professional repair station repair hotline (full door-to-door service to provide you with the best quality
service! Professional TV repairman)
TV Three Nothings:
Fault analysis: After power-on test, it was found that the power-on indicator light turned blue, flashed for a few seconds and then turned red again. (Such as power-on protection
) When powering on, the output of the backlight panel was measured, and there was no normal output. But the measurement standby is normal. The power-on signals of each group were measured at the moment of power-on
and they were normal. The problem is determined to be the power board. Remove the power board and repair it separately. Short circuit and pin-on forced power-on, but there is still no output.
Test resistance short circuit to ground. Measure each rectifier output diode (because it does go bad a lot). It was found that the rectifier had
breakdown. After the replacement, everything was normal in the test machine
The TV automatically shut down:
Analysis of faulty TV repair: When the power was turned on and the test machine was turned on, it was found that the screen turned on and then turned off. At this time, there was no test result. The power-on signal was high voltage. The explanation was
There is a problem with the power board. The power supply was tested when the power was turned on. When it was automatically shut down, the power supply was not tested. The test found that there was no continuity. According to the
principle, it was found that it was 3. It was caused by continuity and was disconnected. , the power-on test is normal. When measured, it is obviously low, indicating that the protection is caused by the low voltage of this circuit. Check. The circuit is formed and breakdown is quickly found. After using the 3rd generation, the machine is tested and the machine works normally. Fault
Troubleshooting
Guigang TV hourly after-sales repair phone number: