Figure 9 Sim Card Connector Circuit - Asus P565 Troubleshooting Manual

be measured at 1.8V or 3.3.V, SIM_CLK should be able to observe a
clock signal and SIM_DAT should be able to observe a high-low
transition signal. If any of the above signals is incorrect, then it is
likely that U301 is defective.
2.3.9 Battery Test
If the device is unable to charge the battery correctly or the incorrect
battery reading is observed, please examining the following:
Unable to charge the battery
● Verify if CHARGER_LDO_18V (U408.4) = 1.8V
● Verify if AC_USB_VCC (R180) = 5V
● Verify if PSEL = 2.8V, if not, it is likely that U301 is defective.
If all the above measurements are correct, it is likely that U1101 is
defective.
華 碩 電 腦
華 碩 電 腦

Figure 9 SIM Card Connector Circuit

GTC ■ Service Manual
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