LG KM710 Service Manual - Page 77

LG KM710 Manual

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4. Trouble Shooting STAR T Insert SIM YES The soldering of SIM connector is OK? YES NO Re-solder the J700 of the main key . . The all paths connected to J700(main key) are OK? NO Re-solder the R710, C702, C703, C703, C704, C705 of the main key YES POWER ON Check the SIM_RST, SIM_CLK, SIM_IO, VRSIM NO Check connection of the Main, Main key, Main FPCB YES The SIM Card is OK (plat)? YES NO SIM card is broken. Change the SIM Card. The DBB(U103) is broken. Change the board. LGE Internal Use Only - 78 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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- 78 -
4. Trouble Shooting
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
STAR
T
Insert
SIM
The soldering of SIM
connector is
OK?
The DBB(U103) is broken.
Change the bo
ard.
The all paths connected
to J700(main key) are OK
?
The SIM Card is OK (plat)
?
Re-solder the
J700 of the main
key . .
SIM card is broken.
Change the SIM Card.
Re-solder the
R710, C702, C703, C703, C704, C705
of the main k
ey
Check the SIM_RST,
SIM_CLK, SIM_IO, VR
SIM
YES
NO
YES
YES
YES
YES
NO
NO
N
O
POWER O
N
Check connection of the Main, Main
key, Main FPCB