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SGH-i300 Flow Chart of Troubleshooting and Circuit Diagrams
2-8
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2-6. Speaker Part
Speaker does not work
Yes
Yes
No
Hardware reset or
resoldering or
Download Image
Yes
Is there sinewave
signal on the U404 pin 12,
24
during window
media playing?
END
CN503 pin 3,4,5,6
=sinewave
Replace speaker and if
speaker is well, than
check the motor & flash
LED
No
Yes
Hardware Reset or
Download Image
No
Yes
Check the
Pin13ofU404isHigh
Hardware Reset or
Download Image
No
Check the
Pin 1 of U404 is High
C473
R422 R427
C485
C448
C487
R429
C484
R420
R419
C486
R423
R433
VBAT
C474
R428
8
VSS
9
VDD
26
NC
NC
27
3
VDD
4
VOMR
5
VSS
6
VOPR
7
VDD
18
VOPL
19
VDD
2
VSS
20
VSS
21
VDD
22
VIML
23
VREFL
24
VIPL
GND
25
10
VIMR
11
VREFR
12
VIPR
13
EN_R
14
VSS
15
VDD
16
VOML
17
VSS
U404
1
EN_L
C477
C407
C449
C409
C443
MSPKLN
MSPKLP
SAPA_EN SAPA_EN
MSPKRN
LOUD_GNDL LOUD_GNDR
MSPKRP
LOUD_SPKL LOUD_SPKR