Analysis and thinking:TG9service manual download site
 TG9service manual download site
1 , a red light flashes , press the maintenance manual tips are inverter failure .TG9service manual download site
2 , a common cause of red light flash 1 are: high voltage inverter output overcurrent, causing inverter IC overcurrent protection. Inverter output pressure is too high, causing the inverter IC overvoltage . There are elements of the inverter circuit protection sampling abnormal , causing the protection circuit malfunction.TG9service manual download site
3 , the lamp is bad , causing the inverter output load , the output voltage is too high lead to protection.TG9service manual download site
4 , due to the protection of the inverter has a characteristic : when the inverter overvoltage , overcurrent protection , the protection of the shutdown was not immediately lights flashed , but normal light screen protection shutdown after 5 seconds , lights flash 1 next . This is the judgment protection is an important basis for the inverter or other reasons .TG9service manual download site

Repair process:TG9service manual download site
The most fundamental principle of exhaust failure is easy to difficult , from the most vulnerable areas to start testing overhaul , but the hardest on the final cause of the malfunction . This exam do question the principle is the same .TG9service manual download site
Because the machine is in P inverter circuit board , four high-voltage power strip backlight lamp also P board. Check this four strip, found loose P8 , P8 dial down the inspection , found a wire loose.TG9service manual download site

Solution:TG9service manual download site
The strip line P8 reassembled . Power , OK.TG9service manual download site