40SL412U no picture Backlight repair HAI7201TC
2.3 هزار بار بازدید -
5 سال پیش
-
TV has sound but no
TV has sound but no picture. The video shows how to determine if LEDs or LED driver are faulty, the process of replacing individual LEDs and how to lower the LED current supplied by the driver IC HAI7201TC.
LED strips are V400H2-LE2-TREM2 and V400H2-LE2-TLEM2.
LEDs are 3V types in a 3014 package.
The original LED current on the HAI7201TC was adjusted to 120mA per two channels (60mA each). We lower it to 40mA each (80mA total each branch). The picture brightness is not at all affected and a similar problem in the future will be avoided.
LED strips are V400H2-LE2-TREM2 and V400H2-LE2-TLEM2.
LEDs are 3V types in a 3014 package.
The original LED current on the HAI7201TC was adjusted to 120mA per two channels (60mA each). We lower it to 40mA each (80mA total each branch). The picture brightness is not at all affected and a similar problem in the future will be avoided.
5 سال پیش
در تاریخ 1398/11/30 منتشر شده
است.
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