LG MG180C Service Manual page 43

3. H/W Circuit Description
Receiver and Speaker circuit
HPOUT_R
HPOUT_L
EQ1
EQ2
EQ3
LED
MTR
SPOUT1
SPOUT2
SPVDD
A single analog switch is employed to support both voice and speaker shone mode with RCV_P. In the
speaker phone mode the VOICEMAIL_EN port sets 'H' , then the RCV_P will be connected with MIDI
sound path(NO) and operate as loud speaker. The other case, the VOICEMAIL_EN port will remain 'L'
state and RCV_P will be connected with receiver path EAR_P(NC)
L203 270nH
RCV_P_SW
RCV_N
L204 270nH
11
10
C201
R200 R201
12
39K
22n
33K
13
C204
47p
R204
14
2
120K
19
VIBRATOR
17
18
VBAT
15
C211 C212
0.1u 4.7u
Figure 22. Receiver and Speaker Circuit
VA204
C228
EVL5M02200
NA
CN201
1
C229
2
3.3p
C230 VA205
NA EVL5M02200
C200
0.1u
V_IO
U200 DG3000DB
B1 A1
IN NO
C202
B2 A2
V+ COM
1u
B3 A3
GND NC
CN200
1
C207
2
27p
C209 C210
47p 47p
- 42 -
VOICEMAIL_EN
RCV_P
RCV_P_SW