LG CG225 Service Manual page 42

Receiver and Speaker circuit
VBAT
A single analog switch is employed to support both voice and speaker shone mode with RCV_P. In the
speaker phone mode the SPK_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 SPK_EN port will remain 'L' state and
RCV_P will be connected with receiver path EAR_P(NC)
C221
47p
U205
NC2 COM2
A1 A3
NC1 COM1
C1 C3
NO2 IN2
A4 A2
NO1 IN1
C4 C2
NLAS4684FCT1G
C230
0.1u
Figure 22. Receiver and Speaker Circuit of FPCB
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3. H/W Circuit Description
R206
RCV_P
4.7
R207
RCV_N
4.7
SPK_RCV_N
SPK_RCV_P
SPK_EN
R212
100K