LG KM710 Service Manual - Page 81
<Fig.26> INPUTC614 of U602, <Fig.27> OUTPUTC619of U602
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4. Trouble Shooting 1 Check the SPK_EN( R606) Is SPK_EN a High? NO U103(DBB) is broken. Change the board. YES Play the Ring tone. NO Check the output(C621-C621) of U602 2 The signal is a Analog YES U602 is broken. Replace the U602. INPUT(C614) of U602 OUTPUT(C619)of U602 LGE Internal Use Only - 82 - 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
U602 is broken.
Replace the U602.
NO
YES
1
Play the Ring tone.
Check the output(C621-C621) of U602
The signal is a Analo
g
Check the SPK_EN( R606)
Is SPK_EN a High
?
U103(DBB) is broken.
Change the board.
N
O
YES
2
<Fig.26> INPUT(C614) of U602
<Fig.27> OUTPUT(C619)of U602