LG -E445 Service Manual page 189

Audio SUB SYSTEM
VBATT
+1V8_VIO_MTK
C503 2.2u C501
C547
2.2u 0.1u
0.1u
C548
MAIN GND
R507 4.7 C4 E3
RCV_SPK_N IN3- OUT+
C3 RCV CALL E4
RCV_SPK_P R508 4.7
IN3+ OUT-
C505 2.2u A3 B1
HPH_L
IN1+ HPL
C507 2.2u B3
HPH_R IN1-
A1
M501 HPR
C510 39n A4
IN2+
C513 39n B4 D1
IN2- CP
B2 E1
I2C_SENSOR_SDA
SDA CN
C2
I2C_SENSOR_SCL
SCL
C525 C526 C527
2.2u 2.2u 2.2u
DNI
0ohm SHORT PAD : SAFP0000401 (0603)
0ohm OPEN PAD : SAFO0000401 (0603)
MAIN GND
SPK/RCV Dualmode Circuit
Close to SPK
SPK_RCV+
SPK_RCV-
C530 C531 VA507 VA508
39p 39p
+3V0_VSIM_MTK
+3V0_VSIM_MTK
J502
C1 C5
VCC GND1
C2 C6
USIM1_RESET_N RST VPP
C3 C7
USIM1_CLK CLK IO
C9 C12
GND2 GND5
C533 C532
C10 C11
GND3 GND4 DNI
1u
LGE Internal Use Only
MAIN MIC
Must be Updated proper Value ( Error )
FB501
60
SPK_RCV+
60
SPK_RCV-
FB502
100
C504 0.1u
MIC_P
EAR_L
R509
C508
EAR_R
39p 100
C515 0.1u
MIC_N
C511 C512
C514
R514
2.2u DNI DNI C516
C517
39p
39p
HS_GND
Class AB & T-COIL
Close to Subsystem
CN501
R540 C3
R535 DNI C543 220n
RCV_SPK_N IN-
10K
R536 DNI C545 220n R537 C2
RCV_SPK_P
IN+
10K
CN503
B1
TCOIL_EN _SHUTDOWN
C546 220n C1
BYPASS
USIM
+3V0_VSIM2_MTK
J503
C1 C5
VCC GND1
C2 C6
USIM2_RESET_N RST VPP
USIM1_DATA C3 C7
USIM2_CLK CLK IO
C9 C12
GND2 GND5
C535
C10 C11
GND3 GND4
1u
VMIC
HOOK_DETECT
C502
10u
Single
MIC501
R510 DNI 1
C506 0.1u
R512 DNI 2 EARMIC_N
R516 0
0.1u
VA501 VA502 R519 0 2 C518
EARMIC_P
1
Dual
MIC502
C519 C520
1n 1n
MAIN GND
VBATT
VIBRATOR
R539
10K
C542
R538
10K 1u
A3
VDD
+3V0_VIBR_MTK
U400
B3
VO+
L902
A1
VO- 1.2m
C528
33p
B2
GND
+3V0_VSIM2_MTK
USIM2_DATA
C534
DNI
- 189 -
3.5pi Ear Jack Connector
+1V8_VIO_MTK
R501 470K
R503 1K
47K
EARMIC_BIAS HS_JACK_DET
R504
L501 100n
R511 2.2K
FM_ANT
10 R513 FB503
EAR_R
FB504
C509
DNI
R515 FB505
EAR_L 10
FB506
C522 C523
22n 22n
L502 C524
100n DNI
Close to 3.5pi ear-jack
R526 0
0 R527
MAIN GND
R528 10
VB501
R529 10
R530 1
1
2
C529
1u
Micro SD
+3V0_MICRO_SD
+1V8_VIO_MTK
CN502
SW1
13
11
9
1
SD_DATA[2]
2
SD_DATA[3]
3
SD_CMD
4
5
SD_CLK 1 R543
6
7
SD_DATA[0]
8
SD_DATA[1]
10
12
VA509 VA510 VA511 VA512 VA513 VA514 14
SW2
C540
2.2u
C541
2.2u
7. CIRCUIT DIAGRAM
M6-GND
6
1800
M1-R
1
1800
M4-DETECT
4D
1800
M4-L
4
1800
M5-MIC
5
J501
VA503 VA504 VA505 VA506
FM_RX_IN_N
HS_GND
MMC_DETECT SWITCH
LOW
OPEN
HIGH ( DETECT ) CLOSE
SD_DETECT
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Only for training and service purposes