U604
1
HFR_P
2
AMP_P
3
HFR_N
4
AMP_N
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VCC_AUDIO_BAT
10
VCC
1A 9
SPK_P
1B0
8
1S
1B1
MELODY_SEL
7
2S
MELODY_SEL
2B0
6
2B1
2A
SPK_N
GND
5
7-19
Flow Chart of Troubleshooting
