Samsung STH-N271 Service Manual page 69

3. STH-N271 IFIC Circuit Diagram
VBAT
R112
680K
R115 C177
560K,1% 100NF
C179 C106 C105
100NF 27PF 100NF
V_VCTCXO
C109
100NF
R120 TX_IN
18K,1%
MOD
R121
TH101 2.7K
TMP_MON
BAT_MON
TX_PWR
R122 C130
RSSI
C129
36K 100NF
10NF
AFC_OUT
AGC_OUT
PA_CNT
R105
NC
V_F REC20+
REC20-
R127
R111
10K
C128 57.6K,1%
Q103 100NF
3
V_F_EN RINGER
2
RAUXO
1
AVCC
TX_AUDIO
R161
NC
15K
XAUXI-
C119
100NF
MIC+
MIC-
VCC
C104
100NF
VCC
U103
C142 100NF
28 16
V4 VDD
C143 100NF
27 2
V3 CS1B
C145 100NF
26 3
V2 CS2
C141 100NF
25 4
V1 RESETB
C140 1UF
29 RS 5
V0
C139 6.8NF
6
VR RW_WRB
C146 1UF 24 7
C2- E_RDB
23
C2+
21 8
DATA(0)
C1- DB0
9
DB1 DATA(1)
C147 1UF
22 10
DATA(2)
C1+ DB2
11
DB3 DATA(3)
C149 1UF 20 12
DATA(4)
C3+ DB4
13
DB5 DATA(5)
19 14
DATA(6)
C4+ DB6
15
DATA(7)
DB7
C151 1UF 18
VOUT
31
C68
17
VSS
33
EL1
32 34
NC EL2
1
NC
C101
R140
100NF
47K
C176
100NF
C127
4.7NF
AVCC
R101
10K
61 40 BBCLK
TX_IN BBCLK
62 39
MOD_COMD BIN BIN
63 38
TX_BAT
MOD TX_BAT
64 37
AGND1 VALID_STRB VALID_STRB
65 36
TX_DATA1
AUX_MON TX_DATA1
66 35
TMP_MON TX_DATA2
67 34
TX_CLK
BAT_MON TX_CLK
68 33
TX_PWR TX_SYNC TX_SYNC
69 U101 32
RX_CLK
RSSI RX_CLK
70 31
EXT_VREF RX_SYNC RX_SYNC
71 30
RX_DATA
AFC_OUT RX_DATA
72 29
AGC_OUT AUX_CLK AUX_CLK
73 28
PA_CNT AUX_STRB AUX_STRB
74 27
AVDD4 AUX_DATA AUX_DATA
75 26
IREF MODE_STS MODE_STS
76 25 FSYNC
AGND5 FSYNC
77 24 R108 0
REC20- SEN SEN
78 23 SO2
AGND3 SI
79 22 R109 0
REC20+ SCLK SCK
80 21 R110 0
SI2
AVDD5 SO
VCC
C115
100NF
C117
100NF
C168 100NF
R117
C121 R118
VBAT
27PF 330K
C124
U105
100NF
8
VDD VOUT1
7
R119
C126 RX_BAT CE1 VOUT2
270K
100PF
6
PLL_ON CE2 VOUT3
5
PON_VRF3 CE3 GND
C157
R123 C131
2.2UF
270K 22PF
16V
C137
100NF
DISPLAY_CS
VCTCXO_PC
R124 10K
RST
ADD(2)
MEMWEB
MEMOEB
DATA(0:15)
VAUX
L103
D101
1SS376-TE-17 220UH
U104 R125 C144
86.6K,1% 10NF
8 1
R159 LDR VSS
PON_TX
91K,1%
7 2
CHV OSC
R126
TX_BAT
6 3 10K
OUT1 ENA EL_EN
IF_ON
5 4
OUT2 VDD
R160 C148
0 100NF
C150
100NF
250V
NOTE: LAYOUT OF U104 IS CRITICAL
SAMSUNG Proprietary-Contents may change without notice
MIC_BIAS_EN
C110
R104
100NF
15K
MIC-
C112
R106
100NF
15K
MIC+
C113
NC
C118
R129 R114
100NF
10K 10K 4
-IN
RAUXO
3
C187 C188
10PF 1NF
2
BYP
1
AMP_EN
C125
220NF
VRX
PREAMP_G
1
2
V_RF1 RF_BAND
3
V_RF3
4
RF_BAND
U107
RF_BAND_PCS
C158 C159 C160
10UF 10UF 10UF VCC VBAT
6.3V 6.3V 6.3V R132
100K
C178
2.2UF
16V
VBAT AVCC VCC
PA_GATE
U110
8 1
VDD VOUT1
7 2
CE1 VOUT2
6 3
CE2 VOUT3 V_VCTCXO
5 4
CE3 GND
C162 C163 C164 C165
2.2UF 10UF 10UF 10UF
16V 6.3V 6.3V 6.3V
VBAT
C169
10UF
U112
6.3V
8 1
VDD VOUT1
7 2
CE1 VOUT2
6 3
CE2 VOUT3 V_IF_VCO U113
5 4 1 S1 6
CE3 GND D1
2 G2 5
G1
C171 C172 C173
3 4
D2 S2
2.2UF 10UF 10UF
16V 6.3V 6.3V
RF_BAND RF_BAND_PCS
11-9
AVCC
RX_AUDIO
ZD101
HEADSET_SENSE
1
2 C102
Q101
12PF
5
1
3 C103
NC
2
3 4
R128
1K
C107
R102 R103 C108
10UF
1.8K 2.2K 100NF
6.3V
CN101
2
1
XAUXI-
C111
MIC101
10PF HEADSET_SENSE 4
MIC
5
2 RX_AUDIO
3
R147 27ohm
1
R107 R116
C114 AMP_AUDIO_OUT 0
1.8K AVCC
NC
C185 C186 C183
R157 NC 27PF 1NF
10
R113
47K
C122
1UF
U102
5
OUT REC20+
6
+IN VDD
C116
7
33UF
GND REC20-
6.3V
8
AMP_AUDIO_OUT
SHDN GND
C184
R158
100PF
NC
V_LNA_PCS
U106
1 D1 6
S1
V_LNA_CELL
2 G1 5
G2
3 4 R130 R131
D2
S2
100K 100K
U108
U109
R133
1 10
5 1 D1 6
S1
IN OUT
2
R134 C161 2 G1 5
G2
GND
C181 390K 1UF
3
4 3 D2 4
470PF
EN ADJ S2
R138
330K,1%
2 S
R139
RF_BAND_PCS
10K
1G
Q104
3 D
R141
330K
PDM
R142
10
VBAT
V_RF2
Q106
6 5 2 1 HP_PWR
R143
3
6.8K
G
V_DET
4
V_DRV_PCS
R144
R145 R146
100K
100K 100K
C170
V_DRV_CELL
3 100NF
Q107 2
1
BATT
R148
100K
CN101 R150
R151 R152
100K
Q108(123)
1K 22K
1
ON_SW
D101
ZD101 C138 R153
1NF 100K
U114
TH101
C189
R161
L104
STH-N271 Circuit diagrams
MIC+
C152
NC
MIC-
C153 C154
NC NC
NOTE:PLACE THESE CAP. AS CLOSE AS
POSSIBLE TO IFIC MIC+ AND MIC- PINS
C189
27PF
R154
5
SEND_END
36K
1 XAUXI-
2
Q102
C174
3 100NF
4
HS_SENSE
R155
220K
C175 HEADSET_SENSE
100NF
R156
NOTE: GPIO INTERNAL PULL-UP
100K
L101
82nH
SPK101
C180
L102
NC
82nH
SPKHA-13
C133 C134 C135 C136
NC 68PF NC 68PF
NOTE: THE RESISTOR FOR OPT BEAD
VBAT U114 VAUX
1 5
VIN VOUT
2
C155 GND
2.2UF 3 4
C156
CONT BYP
16V
10UF
6.3V
AUX_ON
V_PA_BIAS_CELL
V_PA_BIAS_PCS
R135 R136
100K 100K
RF_BAND
VBAT U111 IVCC
1 5
VIN VOUT
2
GND
C166 3 4 C167
CONT BYP
1UF 10UF
6.3V
C182
470PF
VCC
1
Q105 2
POWER_HOLD
3
VCC
R149
100K
ON_SW_SENSE
3
Q108
2
STH-N271_IFIC