Samsung SGH-U900 Service Manual page 57

Flow Chart of Troubleshooting
EAR_AMP_EN
EAR_SEL
EAR_MIC_P
EAR_MIC_N
EAR_R
EAR_L
EAR_SW
JACK_IN
PHONE_DEBUG_ON
TXD
RXD
AUTO_PWR
USB_D_P
USB_D_N
VUSB_5.0V
VMSMA_2.6V
R500
NC
NC
PVDD
C1P
C506
PGND
C1N
C518
C517
C519
VMSMA_2.6V
R523
10 9 8
1
VCC
2
U503
NO1
3 4 5
R532
C535
C536
R610
1
7
2
8
R611
3
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R501
C500
R503
OUTL
SVSS
R507
U500
OUTR
SVDD
R513
C513
C520
C537
TA501 R528
7
NC
6
GND
R531
TA502
C538
AUTO_PWR_J
RXD_J
TXD_J
L602
L603
R605
R606
R607
R608
R609
6
5
4
ZD600
C606 C607
ZD607 TA600
10-15
EAR_OUT_L
EAR_L
EAR_R
EAR_OUT_R
EAR_OUT_R
EAR_R
EAR_L
EAR_OUT_L
VEXT_5.0V VBAT
R618
RADIO_ANT R620
2 1
L604
ZD601
C608
TA601
ZD608
IFC600
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25