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SGH-D720 Flow Chart of Troubleshooting and Circuit Diagrams
2-
19
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2-1-8. Speaker Part
Resolder and check the board
to board connector
NO
NO
NO
YES
YES
YES
Speaker does not work
END
Check the connection
status spk to CN101
Check the
pin4 of U201 = 'LOW'
Check
#4,6,16,18 of
U104
Is speaker ok?
YES
Change Speaker
NO
Check UCD203
Check
U104
C204
R215
R214
C202
C200
C203
C201
R201
R203
C205
VSS
8
VDD
9
V_IN
25
GND
NC
26
27
NC
VDD
3
VOMR
4
VSS
5
VOPR
6
VDD
7
VOPL
18
VDD
19
VSS
2
VSS
20
VDD
21
VIML
22
VREFL
23
VIPL
24
VIMR
10
VREFR
11
VIPR
12
EN_R
13
VSS
14
VDD
15
VOML
16
VSS
17
C206
U104
EN_L
1
SPK_R-
SPK_R+
SPK_L+
SPK_L-
CODEC_OUT_R
CODEC_AGND_L
CODEC_OUT_L
CODEC_AGND_R
SOUND_EN