LG KF690 Service Manual page 52

Audio schamatic of MMI
VREG_MSMP_2.7V
FB400
C537
2.2u
U400 R1114D181D
1 3
VDD VOUT
4 2
NC GND1
6 5
EAR_MIC_LDO_EN CE GND2 C538 C408
27p DNI
L400 270nH
CN400
21
19
1
FB401
2
3
FB402
1800
4
5 FB403 1800
6
7
8
9
10
11
R601
12
13
0
14
15
16
17
18
20
22
GU041-18P-E1000
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
R400
2200
R401 51
C416 33u
OUT2 IN2
5 4
NC3 NC2
6 3
NC4 NC1
7 2
OUT1 IN1
8 1
R402 51
NUF2114MN FL400
C420 DNI
[Fig. 3.24] Audio schematic of MMI
- 53 -
EAR_MIC_P
HPH_L
C417 33u
HPH_R
VREG_MSMP_2.7V
FM_ANT
TA OVP CIRCUIT
USB+_RINT
USB-_RADC
EAR_SENSE_N
VBATT
5
RMT_PWR_ON_N
6
+5V_PWR
7
8
UART_TX
UART_RX rev.H
9
NUS3065MUTAG
SRC DRAIN
4
GATE CNTRL
3
OUT GND
2
VCC IN
1
DRAIN_THERMAL
U401
USB_VBUS
LGE Internal Use Only