macRepairAmb
Member
Board came in for no backlight. Found broken pins on J9000 connector. Replaced J9000 but now the backlight is very dim and flickering. Here are some measurements taken
PPVOUT_S0_LCDBKLT - 27v (so replaced U9701). Still 27v
LCD_BKLT_PWM 2.5v (i'm assuming this is suppose to be 3.4v, so replaced u9600 after checking for blown resistors or shorts).
PPBUS_SW_LCDBKLT_PWR - 12.4v
PP3V3_SW_LCD - 3.3v
PP3V3_S0 - 3.3
PPVOUT_S0_LCDBKLT - 27v (so replaced U9701). Still 27v
LCD_BKLT_PWM 2.5v (i'm assuming this is suppose to be 3.4v, so replaced u9600 after checking for blown resistors or shorts).
PPBUS_SW_LCDBKLT_PWR - 12.4v
PP3V3_SW_LCD - 3.3v
PP3V3_S0 - 3.3