Samsung GT-S3370 Service Manual page 56

Flow Chart of Troubleshooting
UCP 300
L402
C443
VR300 C446
L213
C406
C308 R306 C405
OSC400
C415 C437 L212
C438
C436
L400
C432
C207
TCX200
C213
C203
L70 2 L703 C215 R205 R204 C214
L117
C115
HHOLE100
11 GSM850|EGSM_TX
FEM
9 PCN|PCS_TX
R103
3 CTRL1
GSM_ANT_SEL0_N
R104
GSM_ANT_SEL1_N 4
CTRL2
R105
5 CTRL3
GSM_ANT_SEL2_N
R106
6
GSM_ANT_SEL3_N
CTRL4
ANT
GSM RX
GSM TX
DCS 1800 RX
DCS 1800 TX
PCS 1900 RX
PCS 1900 TX
WCDMA 2100 RX
WCDMA 2100 TX
WCDMA 900 RX
WCDMA 900 TX
POWER
Atten 3dB
C133 L118
C132
GSM850_GSM900_TX
C142 C143
L114
C136 C137 L119
DCS1800_PCS1900_TX
25V
L116 C144 C145
Atten 3dB
C221
C236
L220
R209
PAM201
R208
L110 L107 L104
C123 C119 C117 R210 C226
C127
C238
L113
L219
FEM100
R107 C126
L217
L201
C124
C107
L112
DUF200
C125
C117 L104
12
GSM850_RX
L103
13
GSM850_RX
14
EGSM_RX
15
EGSM_RX
L106
16
PCN_RX
17
FEM100
PCN_RX C119
L107
18
PCS_RX
19
PCS_RX L108
20
WCDMA
L109
22
WCDMA
L110
C123
L111
UMTS2100_ANT
U900_RTX_G900_RX_ANT
R107
L112
C125
C124
L113
C126
C127
VBAT
TA100
C134
PAM100
GSM_PA_PWR_CTL
R119
8 GSM_IN GSM_OUT 9
16
1
DCS|PCS_IN DCS_OUT
GSM_PA_EN 3 2
TX_EN BS
C140
C138 C139
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L221
R110
R207
C132
C139
C138
C134
L119 C144
C137
C145
L116
GSM850_RXM
GSM850_RXP
DCS_RXM
DCS_RXP
PCS_RXM
PCS_RXP
BAND_SELECT
9-28