LG -E445 Service Manual page 131

Case A. Disable detected headset insert.
HOOK_DETECT
C506 0.1u
EARMIC_N
C509
DNI
0.1u
C518
EARMIC_P
C519 C520
1n 1n
MAIN GND
LGE Internal Use Only
R503 1K
EARMIC_BIAS
R511 2.2K
FM_ANT
EAR_R
EAR_L
Ear Jack
Connector
+1V8_VIO_MTK
R501
47K
HS_JACK_DET
R504
L501 100n
R513
10
R515
10
C522 C523
22n 22n
L502 C524
100n DNI
Close to 3.5pi ear-jack
R526
MAIN GND
- 131 - Copyright © 2013 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
470K
Ear Jack Connector
FB503 1800
FB504 1800
FB505 1800
FB506 1800
VA503 VA504 VA505 VA506
0
FM_RX_IN_N
0 R527
HS_GND
Only for training and service purposes
M6-GND
6
M1-R
1
M4-DETECT
4D
M4-L
4
M5-MIC
5
J501