Transflash Trouble Shooting - LG KE500 Service Manual

4.18 Transflash Trouble Shooting

z Transflsh Operation scheme is shown below.
TF_DAT2
TF_DAT3
R100 0
TF_CMD
R101 0
TF_CLK
R102 0
TF_DAT0
TF_DAT1
VIBRATOR
TF_DAT2
VRMMC
TF_DAT3
TF_CMD
z Transflash Trouble
VRMMC
S100
SCHA1B0102
DAT2_RSV
CD_DAT3_CS
CMD_DI
VDD
CLK_SCLK
VSS
DAT0_DO
DAT1_RSV
DETECT
COMMON
C100 C101
DUMMY1
R103
DUMMY2
NA
22p 1uF
CN100
1 14
VBACKUP
2 13
3 12
TF_DAT1
4 11
TF_DAT0
5 10
6 9
TF_CLK
7 8
START
Insert Transflash Card
YES
Check the VRMMC level
`
VRMMC is2.8V?
YES
Check signal of
TF_CLK, CMD, DAT0,DAT1 ,
DAT2,DAT3
YES
S201or U102 has a probem.
Change the main-board
- 99 -
4. TROUBLE SHOOTING
C100
R101
R102
R103
CN101
NO
Refer to Power on
Trouble
Transflash card has a
NO
problem.
Change the Transflash card
S100