Samsung SGH-X620 Service Manual page 48

Flow Chart of Troubleshooting
C523
C526
C527
R520
SCL
R521 C528
C529
SDA
32K
TP500
TP501
TP502
R_INT
TP503
FM_MEL_P
FM_MEL_N
EAR_LM_L
FM_RADIO_L
FM_RADIO_R
EAR_LM_R
EARSPK_R
EARSPK_L
EARSPK_COM
SDA
SCL
TP504
C532
A4
CD1
E7
CD2
D2
CD3
A7
CLOCK
B2
CPOUT
B7
DATA
F2
AGND
C7
DGND
D6
DGND
F7
DGND
C2
RFGND
G1
FREQIN
F6
INTCON1
E6
INTCON2
G7
INTX
L504 A2
LO1
A3
LO2
A1
LOOPSW
G4
MPXOUT
AVDD
R552
C534
C545
C536
C538
C546
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C524
U503
A6
BUSENABLE
B1
CAGC
D1
RFIN1
C1
RFIN2
A5
SWPORT
G2
TIFCENTER
G6
TMUTE
F4
VAFL
G5
VAFR
E1
VCC
D7
VDD
B6
VREFDIG
F1
XTAL
B4
NC
G3
NC
1
NC
2
NC
R524
C530
R523
VDD3
C535
U501
D1
MONO+
A4
B1 C537
MONO- RHP3D1
A3
RHP3D2
D4
RIN
D3
E4 LIN
LHP3D1
E3
D5 C539
ROUT LHP3D2
E5 LOUT
A2
I2CSPIVDD
E1
C2
VDD I2C_SPI_SEL
C3
VDD
C1
C4 VDD
GND
C5
GND
A5
VOC
B5
A1 SDA
NC
D2
B2
SCL NC
1
B4
NC
PHONE_IN
2
B3
NC
ID_ENB
E2 CBYPASS
R536
0
C540
7- 22
C522
C525
L503
TP507
BUSENABLE
R545
SW_PORT
FM_RADIO_L
FM_RADIO_R
C531
R534
FM RADIO
FM_RADIO_ANT
VDD2
R522