LG MG230 Service Manual page 25

3. TECHNICAL BRIEF
AIN3N
H16
AOUT1P
K17
AOUT1N
P15
AOUT2P2
R16
AOUT2P1
R15
AOUT2N1
P14
AOUT2N2
H17
AOUT3P
J17
AOUT3N
G11
TDO_ABB
F13
TMS
E13
TDI_ABB
F12
TCK_ABB
VBAT
C223
220p
C224
R214
0.068u
10K
SPK_P
C228
R216
SPK_N
0.068u
10K
LGE Internal Use Only
R121 0
R122 4.7
R123 4.7
R124 0
R125 0
C156
39p
C157
39p
R127
0
R128 0
SPEAKER-RECEIVER SELECTION
C217 C218
2.2u 0.1u
R211
47K
U202 MAX9716ETA+T
1
_SHDN
6
VCC
8
OUT-
2
BIAS
5
OUT+
3
IN+
7
GND R217
4
100K
IN-
9
PGND
EUSY0304901
C229
1u
R219
47K
C232
220p
SPEAKER FILTER
R100 0
SPKREC_N
R101 0
SPKREC_P
Figure 3-10 Main Speaker Circuit
- 24 -
C153
C154 C155
39p
39p 39p
SPK_P
C159
39p
SPK_N
HEADSET_SPK_OUT_P
HEADSET_SPK_OUT_N
C160 C161
39p 39p
VBAT
C222
10u
U203
C220 1u
NLAS5223BMNR2G
1
VCC
AMP_SHDN
(P)
2
NO1
3
SPK_RCV_P
COM1
4
IN1
5
REC_P
NC1
EUSY0300101
R220
100K
SPKREC_L_N
C104 C105
47p 10p
SPKREC_L_P
Copyright © 2007 LG Electronics. Inc. All right reserved.
REC_P
REC_N
(N)
10
NO2
9
SPK_RCV_N
COM2
8
IN2
7
REC_N
NC2
6
GND
SPK_SEL
Only for training and service purposes