LG KM710 Service Manual - Page 92

Transflash Trouble Shooting

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4. Trouble Shooting 4.18 Transflash Trouble Shooting z T- flash Operation scheme is shown below. VRIO MM_2V8 R101 100K TF_DAT2 TF_DAT3 TF_CMD TF_CLK TF_DAT0 TF_DAT1 TFLASH_DETECT C112 22p C113 1uF S100 SCHA1B0102 DAT2_RSV CD_DAT3_CS CMD_DI VDD CLK_SCLK VSS DAT0_DO DAT1_RSV COMMON DETECT DUMMY1 DUMMY2 SUB Flexible PCB z Transflash Trouble START Insert Transflash Card YES Check the MM_2V8 level MM_2V8 is 2.8V? NO Refer to Power on Trouble YES Check signal of TF_CLK, CMD, DAT0,DAT1 , DAT2,DAT3, DETECT YES Check the flexible PCB YES NO Transflash card has a problem. Change the Transflash card NO Change the flexible PCB Main board has a problem. Change the main-board Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes - 93 - LGE Internal Use Only

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4. Trouble Shooting
4.18 Transflash Trouble Shooting
z
T- flash Operation scheme is shown below.
z
Transflash Trouble
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
22p
C112
1uF
C113
VRIO
MM_2V8
CD_DAT3_CS
CLK_SCLK
CMD_DI
COMMON
DAT0_DO
DAT1_RSV
DAT2_RSV
DETECT
DUMMY1
DUMMY2
VDD
VSS
SCHA1B0102
S100
R101
100K
TFLASH_DETECT
TF_DAT2
TF_DAT1
TF_DAT3
TF_CLK
TF_CMD
TF_DAT0
YES
NO
Check the
MM_2V8 level
MM_2V8 is 2.8V?
Insert Transf
lash Card
START
Main board
has a problem.
Change the main-boa
rd
YES
Transflash card has a
problem. Change the
Transflash car
d
NO
Check signal
of
TF_CLK, CMD, DAT0,DAT1 ,
DAT2,DAT3,
DETECT
Refer to Power on
Trouble
YES
Change the flexible PC
B
NO
Check the flexible
PCB
YES
SUB Flexible PCB