Samsung Anycall GT-B5722C Service Manual page 22

Flow Chart of Troubleshooting
SPK_P
SPK_N
RCV_P
RCV_N
VDD_IO_HIGH_2.9V
RCV_P
RCV_SPK_P
AMP_SPK_P
HFR_P_S
RCV_SPK_P
HFR_P_M
AUDIO_PATH_SEL
C422
C424 C425
C423
C426 C427
COMC
NCD
VCC
U403
NOA
COMA
R418
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ZD403
L409
L411
ZD405
ZD404
L410
L412
ZD406
AMP_SPK_N
RCV_SPK_N
NOC
RCV_N
GND
NCB
HFR_N_M
RCV_SPK_N
HFR_N_S
9-16
SPK_PAD
1 1
2 2
RCV_PAD
1
1
2
2
RCV_SEL
R416