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4.20.6 Ear-Mic jack Detection Troubleshooting
Start
Disassemble the rear case of
phone. Connect Headset to
the Ear-Mic Socket of Phone
Check the Ear-Jack Detection.
Is the level of VA605 low?
Change the Main board
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Only for training and service purposes
NO
YES
_
U
S
B
_
D
+
U
S
B
_
D
-
E
A
R
_
S
E
N
S
E
_
N
V
B
A
T
T
R
E
M
O
T
E
_
P
W
R
_
O
N
U
A
R
T
_
T
X
U
A
R
T
_
R
X
Re-solder VA605 or
Check status of CN600
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4. TROUBLE SHOOTING
VA605
LGE Internal Use Only
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Table of Contents
Troubleshooting
