Service manual

GTC Service Manual
ASUS Proprietary 13
華
華
碩
碩
電
電
腦
腦
3. MMI Test item
4
44
4.1
.1 .1
.1 Micro
MicroMicro
Micro SD Test
SD Test SD Test
SD Test
The MMI test tool will be auto-executed by itself after we insert the
MMI Micro SD card. If the phone can’t get the data on the storage
device, we should check the pathway on below process.
A. V_MMC 3.0V, CON27 Pin4
B. SD_DET# 0V, R54 Pin1.
C.
If item A fail, try to check open or short issue on the PMU.
If item B fail, try to check the CON27 Pin13 & Pin14.In the general; it
will short when we put in the card. Please change the CON27 if the
Pin13 and Pin 14 not short.
Figure 6. MicroSD + SIM Circuit
4
44
4.2
.2 .2
.2 SIM Test
SIM TestSIM Test
SIM Test
If SIM test fail, please check below items.
A. SIM_VCC 2.85V
If not please check the open or short on U39.
B. Please check the connector 27 on touch issue.