Alan.L
Member
Board turn on to no backlight with (?) folder.
i've replacement U9701 because it has corrosion on pin21 and pin23.
Pin21's pad is gone, so i've run a wire to C9796.
LVDS connector looks good.
i get 12.55v on F9800 Fuse when connected LVDS cable.
i found problem...
R9809
pin1 4.1V (PPBUS_S0_LCDBKLT_EN_DIV)
pin2 0V (PPBUS_S0_LCDBKLT_EN_L)
R9808
pin1 12.55V (PPBUS_S0_LCDBKLT_FUSED)
pin2 4.1V (PPBUS_S0_LCDBKLT_EN_DIV)
Q9807
pin1 0V (Ground)
pin2 3.27V (BKLT_PLT_RST_L)
pin3 0V (PPBUS_S0_LCDBKLT_EN_L)
pin4 0V (BKLT_EN_L)
pin5 3.19V (LVDS_IG_BKLT_ON)
pin6 0V (BKLT_EN_L)
i've replacement U9701 because it has corrosion on pin21 and pin23.
Pin21's pad is gone, so i've run a wire to C9796.
LVDS connector looks good.
i get 12.55v on F9800 Fuse when connected LVDS cable.
i found problem...
R9809
pin1 4.1V (PPBUS_S0_LCDBKLT_EN_DIV)
pin2 0V (PPBUS_S0_LCDBKLT_EN_L)
R9808
pin1 12.55V (PPBUS_S0_LCDBKLT_FUSED)
pin2 4.1V (PPBUS_S0_LCDBKLT_EN_DIV)
Q9807
pin1 0V (Ground)
pin2 3.27V (BKLT_PLT_RST_L)
pin3 0V (PPBUS_S0_LCDBKLT_EN_L)
pin4 0V (BKLT_EN_L)
pin5 3.19V (LVDS_IG_BKLT_ON)
pin6 0V (BKLT_EN_L)
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