LG KM710 Service Manual - Page 59
LG KM710 Manual
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4. Trouble Shooting START Check is the CN700(main key) Is well-soldered? YES R712(main key) Is well-soldered? YES Check is the connection of Main key, Main, Main FPCB ? YES Check the Main FPCB Main FPCB is OK? YES U103( Main) check ? YES Booting is operating properly Re-solder the CN700 (main battery terminal) NO Re-solder R712(main power key) NO Connect the Main key, Main, Main FPCB NO Replace Main FPCB NO Replace the U103(Main) NO LGE Internal Use Only - 60 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
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4. Trouble Shooting
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
Re-solder the CN700
(main battery terminal
)
START
Check is the CN700(main key)
Is well-solde
red?
R712(main key)
Is well-solde
red?
Check is the connection of
Main key, Main, Main FPCB
?
Check the Main FPCB
Main FPCB is OK
?
U103( Main) check
?
Re-solder
R712(main po
wer key)
Connect the Main key, Main, Main FPC
B
Replace Main FPC
B
Replace the U103(Main
)
Booting is operating properl
y
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO