Samsung SGH-X640 Service Manual page 35

Speaker
VDD2
C300
R300
MEL_13M
R302
VDD2
VDD2
U300
1 5
NC
VCC
2
IN
R301
3 4
GND
OUT
M_RST
R303
C303 C304
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VDD3
32 30 29 27
1
CLKI
2
LED
/IRQ
/RST
U301
5
NC
6
PLLC
7
VDD
8
VSS
9
VREF
C302
10 11 12 13 14 15
C305
R305
MELODY IC
R306
R307
7-11
Flow Chart of Troubleshooting
HRD_N
HA(1)
MELODY_CS
HWR_N
HD(0)
HD(1)
26
25
HD(2)
D2
24
HD(3)
D3
23
HD(4)
D4
22
HD(5)
D5
21
HD(6)
D6
20
HD(7)
D7
19
MTR
VIB
18
SPOUT2 AMP_N
17 C301
SPOUT1
AMP_P
16
SPVDD
C307
C306
C309
C310
R308
EARP_HF