Hello!
I've got an image, chime etc..
Can't quite work out if the chip is screwed or its something else, nothing on backlight filter and i'm unsure what the BKL_ISEN is suppose to be on a normal board. Don't have one to hand.
Any help would be amazing!
This board is undamaged, No drop or water damage. Backlight was flickering randomly for a few hours, it then died completely
Diode mode test on PIN 2 D9701 (Red on ground, Black on pin) = 0.597
PPBUS_SW_BKL
L9701 PIN 1 - 12.6v
L9701 PIN 2 - 12.6v
PP5V_S0_BKL - 5v
C9710 PIN 1 - 5v
C9710 PIN 2 - 0 (GND)
PP3v3_S0_BKL_VDDIO - 3.3v
C9711 PIN 1 - 3.3v
C9711 PIN 2 - 0v (GND)
L9701 (INDUCTOR, NO BOOST!?)
PIN 1 - 12.5
PIN 1 - 12.5
BLK_VSYNC_R (HAVE TESTED BOTH RESISTORS, 10k EACH)
R9755 PIN 1 - 0v
R9755 PIN 2 - 0v
BLK_FLTR
R9741 PIN 1 - 0v
R9741 PIN 2 - 0v
BLK_SCL
R9753 PIN 1 - 3.3v
R9753 PIN 2 - 3.3v
BLK_SDA
R9757 PIN 1 - 3.3v
R9757 PIN 2 - 3.3v
BKL_ISET
R9714 PIN 1 - 0v
R9714 PIN 2 - 0v
BKL_EN
R9731 PIN 1 - 12.5v
R9731 PIN 2 - 3.1v
(DIODE AFTER INDUCTOR)
D9701 PIN 1 - 12.6v
D9701 PIN 2 - 12.6v
(FEEDBACK LINE)
XW9720 PIN 1 - 3.5v
XW9720 PIN 2 - 3.5v
BKL_PWM (WORKING)
R9703 PIN 1 - 3.3v
R9703 PIN 2 - 3.3v
BKL_ISEN1 - R9717 - 0.5v / 0.5v
BKL_ISEN2 - R9718 - 0.27v / 0.27v (PROBE POINT 0.450v)
BKL_ISEN3 - R9719 - 0.16v / 0.16v (PROBE POINT 0.203v)
BKL_ISEN4 - R9720 - 0.16v / 0.16v (PROBE POINT 0.16v)
BKL_ISEN5 - R9721 - 0.16v / 0.16v
BKL_ISEN6 - R9722 - 0.12v / 0.11v
TP_BKL_FAULT - 0v
I've got an image, chime etc..
Can't quite work out if the chip is screwed or its something else, nothing on backlight filter and i'm unsure what the BKL_ISEN is suppose to be on a normal board. Don't have one to hand.
Any help would be amazing!
This board is undamaged, No drop or water damage. Backlight was flickering randomly for a few hours, it then died completely
Diode mode test on PIN 2 D9701 (Red on ground, Black on pin) = 0.597
PPBUS_SW_BKL
L9701 PIN 1 - 12.6v
L9701 PIN 2 - 12.6v
PP5V_S0_BKL - 5v
C9710 PIN 1 - 5v
C9710 PIN 2 - 0 (GND)
PP3v3_S0_BKL_VDDIO - 3.3v
C9711 PIN 1 - 3.3v
C9711 PIN 2 - 0v (GND)
L9701 (INDUCTOR, NO BOOST!?)
PIN 1 - 12.5
PIN 1 - 12.5
BLK_VSYNC_R (HAVE TESTED BOTH RESISTORS, 10k EACH)
R9755 PIN 1 - 0v
R9755 PIN 2 - 0v
BLK_FLTR
R9741 PIN 1 - 0v
R9741 PIN 2 - 0v
BLK_SCL
R9753 PIN 1 - 3.3v
R9753 PIN 2 - 3.3v
BLK_SDA
R9757 PIN 1 - 3.3v
R9757 PIN 2 - 3.3v
BKL_ISET
R9714 PIN 1 - 0v
R9714 PIN 2 - 0v
BKL_EN
R9731 PIN 1 - 12.5v
R9731 PIN 2 - 3.1v
(DIODE AFTER INDUCTOR)
D9701 PIN 1 - 12.6v
D9701 PIN 2 - 12.6v
(FEEDBACK LINE)
XW9720 PIN 1 - 3.5v
XW9720 PIN 2 - 3.5v
BKL_PWM (WORKING)
R9703 PIN 1 - 3.3v
R9703 PIN 2 - 3.3v
BKL_ISEN1 - R9717 - 0.5v / 0.5v
BKL_ISEN2 - R9718 - 0.27v / 0.27v (PROBE POINT 0.450v)
BKL_ISEN3 - R9719 - 0.16v / 0.16v (PROBE POINT 0.203v)
BKL_ISEN4 - R9720 - 0.16v / 0.16v (PROBE POINT 0.16v)
BKL_ISEN5 - R9721 - 0.16v / 0.16v
BKL_ISEN6 - R9722 - 0.12v / 0.11v
TP_BKL_FAULT - 0v
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