Micro Sd Trouble - LG GW520 Service Manual

5. Trouble shooting

5.9 Micro SD Trouble

Checking Flow Checking Flow
Start Start
Change Micro SD card Change Micro SD card
YES YES
Does Micro SD card Does Micro SD card
work well? work well?
YES YES
END END
Circuit Diagram Circuit Diagram
MMC_CARD
LGE Internal Use Only
NO NO
Check soldering of S200 Check soldering of S200
And relevant component And relevant component
Check voltage of Check voltage of
2V8_VMME, 2V62_VIO 2V8_VMME, 2V62_VIO
YES YES
Does Micro SD card Does Micro SD card
2V8_VMME
S/W (Level)
OUT Close(LOW)
IN Open(HIGH)
MMC_D1
MMC_D0
MMC_CLK
MMC_CMD
MMC_D3
MMC_D2
MMC_DETECT
GW520 service manual
NO NO
YES YES
NO NO
TP1 TP1
YES YES
NO NO
work well? work well?
TP1
2V62_VIO
R231 10K
C233
0.1u
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ResolderS200 and ResolderS200 and
Relevant component Relevant component
Change U200 Change U200
1. Change soket(S200) 1. Change soket(S200)
2. Change main board 2. Change main board
S200
DAT1_2
DUMMY1
DAT0
VSS
CLK
VDD
CMD
CD_DAT3
DUMMY2
DAT2
DETECT_A
DETECT_B
DUMMY3
GND
104042-001
ENSY0023501
Only for training and service purposes