Micro Sd Card - Asus P526 Service Manual

5.11 Micro SD card

Needed Equipments:
A. Power supply set to 4V/2A.
B. Oscilloscope
C. Micro SD card
a. First please check the socket of micro SD card is broken or not.
b. R197 (GP8_MMC_PWR_EN) shall be high (2.8V)
c. R198 (VSDMMC_3V3) shall have 3.3V.
d. When micro SD card is inserted, pin#9 of J5 (GP117_SD_DECT#) shall be low (0V).
e. All signals; SDMMC_DAT0 ~ SDMMC_DAT3, SDMMC_CLK and SDMMC_CLK shall have
correct signal (high –> 3.3V, low –> 0V).
GTC ■ Service Manual