Samsung SGH-D820 Service Manual page 61

MAINAMP_R
MAINAMP_L
LOUD_EN
SPK_R_P
SPK_R_N
C550 C551
C556
R551
R552
24
22
23
18
16
typical 3.8V
15
VBAT
19
21
L504
R559
C559
TA557
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D_Class_AMP
U504
1 13
EN_L EN_R
12
VIPL VIPR
10
VIML VIMR
11
VREFL VREFR
6
VOPL VOPR
4
VOML VOMR
3 2
VDD VSS
7 5
VDD VSS
9 8
VDD VSS
14
VDD VSS
17
VDD VSS
20
VDD VSS
25
GND
26
NC
C555
27
NC
C558
7-13
Flow Chart of Troubleshooting
SPK_L_P
SPK_L_N
R558
C552 C553
C554