Vibrator Test; Rtc Test; Storage Test - Asus P552W Manual

E. LCD_FCLK, LCD_LCLK, LCD_PCLK should have high-low
transaction, check if there is any
defect or open on componetR701, R702, R703.
F. LCD_DATA_EN should be 2.9V
The above signal could result in white screen, if
LCD_PWR_EN/LCD_RESET# signal is abnormal, it means CPLD
is NG. The signal LCD0 ~ LCD15 is from CPU, if the color of
panel is abnormal, please check component CON701 and CPU.
G. If there is no backlight, check the voltage on V_LED, there should
be 12V. If backlight is
abnormal please check U1503 and the component around it.

2.3.2 Vibrator Test

If the vibrator is not functioning, please check if VIBRA_C0
voltage is measured at 3V and also no defect is found on component
R1516 or D1501, then it is likely that U1505 is defective.

2.3.3 RTC Test

It is rare to observe this type of defect, but if it does occur, please
examine if X301 crystal is sending out 32.768KHz clock signal
correctly. If 32.768KHz crystal is running correctly, then it is likely
that U301 (CPU)

2.3.4 Storage Test

It is also rare to observe this type of defect, but if it does occur, it
is likely that U601 is defective.
華 碩 電 腦
華 碩 電 腦
Figure 1.2 Vibrator mechanism
GTC ■ Service Manual
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