Samsung SGH-X620 Service Manual page 30

Flow Chart of Troubleshooting
Initial
D_REF_13M
32K
P11
CKI
P13
CKI32I
R204
R205
P14
RSTON CKI32O
C216
C10
RESETN
M10
RSTO_N
H10
RST_N
K14
AUXON
HD(0:15)
H4
HD(0)
HD0
HD(1) H3
HD1
H2
HD(2)
HD2
J3
HD(3)
HD3
E5
HD(4)
HD4
H1
HD(5)
HD5
B1
HD(6)
HD6
HD(7) E4
HD7
F3
HD(8)
HD8
HD(9) F2 HD9
HD(10) F1
HD10
E1 HD11
HD(11)
D1
HD(12)
HD12
E3
HD(13)
HD13
E2
HD(14)
HD14
B2
HD(15)
HA(1:26) HD15
HA(1) M4
HA1
P3
HA(2)
HA2
L4
HA(3)
HA3
N3
HA(4)
HA4
K5
HA(5)
HA5
M3
HA(6)
HA6
P2
HA(7)
HA7
N2
HA(8)
HA8
HA(9) M1
HA9
N1
HA(10)
HA10
HA(11) L2
HA11
HA(12) L1
HA12
M2
HA(13)
HA13
J2
HA(14)
HA14
VDD3 J5
HA(15)
HA15
K3
HA(16)
HA16
J4
HA(17)
HA17
HA(18) K4
HA18
K2
HA(19)
HA19
G4
HA(20)
HA20
P5
HA(21)
HA21
N6
HA(22)
HA22
L6
HA(23)
HA23
R211 R224
J7
HA(24)
HA24
J6
HA(25)
HA25
HA(26) H6
HA26
L5
HWR_N HWR_N
H5 HRD_N
HRD_N
G3 CS_N3
IMAGE_CS
M5
MELODY_CS CS_N2
G5
NCSRAM CS_N1
N4
CS_N0
NCSFLASH
M12
SW_PORT GPIO0
K9
AMP_EN
GPIO1
L8
AUDIO_SW1 GPIO2
M9
CHG_ON GPIO3
P7
IMAGE_INT GPIO4
L7
IMAGE_RESET GPIO5
L9
MELODY_RESET
GPIO6
N7
GPIO7
R_INT
P6
END_OF_CHARGE GPIO8
N8
CTS0 GPIO9
K8
M_INT GPIO10
KBIO(7)
L14
KBIO7
KBIO(6)
L12
KBIO6
KBIO(5) L13
KBIO5
KBIO(4)
L11
KBIO4
KBIO(3) J11
KBIO3
KBIO(2)
K13
KBIO2
KBIO(1)
J10
KBIO1
KBIO(0)
K11
KBIO0
KBIO(0:7)
VDD1 VDD1 VDD1
C202 C203
VDD1 VDD1 VDD2 VDD3
U202
SYSOL3 GPRS MODEM
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VDD2 VDD2 VDD2 VDD2 VDD3 VDD3
C200
C204 C205 C206 C207 C208
VDD1
VDD1 AVDD
R200
C211
C212
C213
C213 close to B12
N9
GPON2
L10
GPON1
G10
AUXST
D5
RFSIG0
A6
RFSIG1
D6
RFSIG2
B6
RFSIG3
A7
RFSIG4
C7
RFSIG5
B7
RFSIG6
C6
RFSIG7
E7
RFSIG8
K10
RFSIG9
D7
RFSIG10
H12
RXON
G12
TXON
CCLK E10
E9
CDO
D8
CDI
D9
CEN
J12
RFE_N0
K12
RFE_N2
C14
VREF
C219
E12
AUXDAC1
D13
AUXDAC2
D12
AUXDAC3
H13
QP
H14
QN
J13
IP
J14
IN
F14
AUXADC1
G14
AUXADC2
E14
AUXADC3
F13
AUXADC4
B10
EARP
A11
EARN
A10
AUXSP
B11
BUZ
A13
MICP
B13
MICN
B14
AUXMICP
A14
AUXMICN
MCLK D10
A8
ADI
B9
AFS
B8
ACLK
A9
ADO
G11
BOEN
E11
BDIO
F10
BIEN
F11
BIOCLK
C2
SCK
B3
SDA
M13
SIMIO
M14
SIMCLK
M11
SIMERR
PWM1 E6
F4
PWM0
7- 4
C201
VDD_KEY_ON
irDA_DOWN
REF_ON
TXVCO_SW1
TXVCO_SW2
PAM_TX_EN
ANT_SW1
ANT_SW2
ANT_SW3
PON_SYNT
PON_TX
PON_RX
RF_BBI_CLK
RF_BBI_DATA
RF_EN_SYNT
AVDD_TEMP
AFC
RAMP
QRX_TX_P
QRX_TX_N
R210
IRX_TX_P
IRX_TX_N
MES_BATT
EAR_ADC
R208
EAR_P
EAR_N
C228
LINE_OUT
VDD1
MIC_P
MIC_N
AUX_MIC_P
AUX_MIC_N
R214
D_REF_13M
DD
FSC
DCL
DU
BOEN
BDIO
BIEN
BIOCLK
VDD2
R220
R221
SCL
SDA
SIMIO
SIMCLK
IT_PMU
AUDIO_SW2
BUSENABLE
AVDD_TEMP
R207
VF
R209
TH200