LG KS20 Operating Instructions Manual page 66

3. TECHNICAL BRIEF
Handset main MIC BLK
Audio Amp for loud Speaker
VPWR
C401 0.1u R402
LINE_ON
C402 0.1u
LINE_OP
nSPEAKER_SHDN
MODEM_RCV_P
AMP_OUT_N
MODEM_RCV_N
AMP_OUT_P
LGE Internal Use Only
MIC
CN100
1
2
OSF213-42DC
SUMY0010508
Speaker Amp
R400 47K
R401 47K
1u
C400
U401 LM4898ITLX-NOPB
B1
VDD VO2
20K C1
IN- VO1
R403 20K A1
IN+ BYPASS
TP400 C2
SD_SEL SD_MODE
GND
1
2
3
4
Connector
INTERNAL_MIC_P
C3
AMP_OUT_P
A3
AMP_OUT_N
C403 1u
A2
B2
B3
VPWR
U400
FSA2267AL10X
9
SPKR_N
1B0 1A
8
nRECEIVER_SW
1B1 1S
7
2B0 2S
6
SPKR_P
2B1 2A
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Only for training and service purposes