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6.2 MMI Test Item
6.2.1 Display Test
The item is focus verify the function "LCM interface" and "backlight",
please check the below item if the result is "No Go".
A. LCD_PWR_EN
B. LCD_3.0V
C
. LCD_RESET#
D. LCD_FCLK, LCD_LCLK, LCD_PCLK should exist the clock signal for
LCD panel. If we can not measure the signal should be check the soldering
/floating each side on
E. LCD_DATA_EN
The white screen will happen from above items. If
"LCD_PWR_EN/LCD_RESET#" a
color deviation or ab
LCD15 with he CON
after change or re-work the CON1, the main of the reason should be
CPU NG.
F. V_LED
If the backlight can not active on the LCD panel, w
the 12V on the "V_LED". If not then check the relate components o
the U48.
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碩
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腦
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Figure 2. Battery fault mechanism
1.8V
2.9V
2.9V
resistor (R19, R20, R21).
，
2.9V
normal expose should be check the LCD0 ~
t
1. If we can't get improve the signal status
12V
GTC ■ Service Manual
bnormal mean CPLD NG. The
14
e should measure
f
ASUS Proprietary
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