Samsung SCH-A302 Service Manual page 51

4. RF Circuit Diagram
1 2
RESET
SLEEP_CLK
A
MSM_TCXO
CX8
R103
C102
430
47PF
LOCK
LNA_GAIN
ZD103
2
3.0_TCXO
5
1 3 4 6
B
R601
U601
NC
1 8
SEND_END AOUT VCC
R603 200K
2 7
A- BOUT
3 6
CN303 C601
A+ B-
1
47NF
4 5
3
GND B+
5
4
R606
2
4.7K
C
R611
TRK_LO_ADJ
2.2K
MIC R136
10K
RX_AGC_ADJ
Q_OFFSET
C605 I_OFFSET
220PF
R138
10K
C142 C143
SPK+
100NF
SPK- 100NF
3.0_TX
R139
C604 10K
33UF
PA_R0
C600
6.3V
D TX_AGC_ADJ
220PF
3.0_TCXO
PA_ON
R613 R612 IREF
1.5K
1K
3.0_MA
6.3V
C640 C144 C145
C146
10UF
100NF 10NF 470PF
10NF
C606
C609 10NF
R616 10K
C611 C612
2K R619
R620 100NF
180K 100NF
C613 100NF
C614
NC
E
3.0_MA
C615
R622
100NF
1K
RX_AUDIO
D601
D602 C617
100NF
TX_AUDIO
C618
100NF
F
R127
330 Q102
SVC_LED_ON
3
1
2
R132
330
ALT_LED_ON
3
1
2 Q101
G
R148 0
LWR
R150 NC
LCD_EN
F101
R143
NC 1 5
IN OUT
2 6
R142 0
IN OUT
GP_CS
3 7
R145 NC
IN OUT
R144 0 4 8
IN
LCD_CS OUT
G G
A(2)
9 10
1
1
F103 3
EL_EN_A 3
5
5
1 5
7
AD(6) IN OUT 7
9
9
2 6 11
H AD(4) IN OUT 11
13 13
3 7
IN OUT 15 15
AD(2) RESET
17
SPK+ 17
4 8
IN 19
AD(0) OUT 19
G G
9 10
1 2
3 4 5
3.0_MP
R105
330K
C101
10NF
R101 10K
C103
10NF
3.0_MC 3.0_MP
R602 C108 C109
NC 100NF 10NF
JACK_S
3.0_TCXO
R605
100K
B9 PDM2
C8 PDM1
C140
R106
SYNTH_LOCK
10NF C10
0
SLEEP_N
A8
SLEEP
B7 IDLE_N
TRK_LO_ADJ
B11
B12 LNA_GAIN
R147 1K
C7 LNA_RANGE0
R137
LNA_RANGE1
C9
1K
A11 RX_AGC_ADJ
B10 Q_OFFSET
I_OFFSET
A10
C_RX_QDATA0
D13
C_RX_QD(0)
C13 C_RX_QDATA1
C_RX_QD(1)
C_RX_QDATA2
B13
C_RX_QD(2)
A13 C_RX_QDATA3
C_RX_QD(3)
B14 FM_RX_QDATA
C_RX_ID(0)
FM_RX_IDATA
B15
C_RX_ID(1)
C17 C_RX_IDATA2
C_RX_ID(2)
C_RX_IDATA3
C16
C_RX_ID(3)
FM_RX_STB
A15
A14 CX8_FM_CLK
A9 PA_R0
PA_R1
R140 1K D7
A12 TX_AGC_ADJ
C11 PA_ON2
R141
PA_ON
D6
TX_QB
C4 DAC_IREF
1K
TX_Q
Q_OUT_N
A6
TX_IB
Q_OUT
B5
TX_I
B6 I_OUT_N
A7 I_OUT
R614
GND_RET
F16
180K C607 C608 100NF
E15 CCOMP
100NF
MICFBN
G14
C622 MICINP
10NF R618 H17
J17 MICOUTN
100NF C610
MICOUTP
10K H16
G16 MICINN
G15 MICFBP
L16 EAR10P
M17 EAR10N
MICBIAS
R621 NC G17
MIC1P
J16
MIC1N
K17
H14 MIC2P
MIC2N
H15
K14 EAR20
J14 AUX1P
AUX1N
J15
L17 AUX0P
AUX0N
K16
R626 R625
NC NC
C616
10NF
R628
39K
TCXO_ON_OFF
MSM_INT
PLL_EN
PLL_CLK
C619 C620 PLL_DATA
100NF 10NF
C621 PS_HOLD
JACK_S
10NF
V_F_CON
SCL
SDA
EL_EN_A
3.0_MP
R130 R131
1.2K
100K
C123
10NF
HALL_EFFECT_IC
C124
100NF
C125 C126 C127
1NF 1NF 1NF
ALT_LED_ON
HALL_EFFECT_IC
3.0_MP
J102
F102
2
2
4
4
6 5 1
6 OUT IN AD(7)
8
8
6 OUT IN 2
10
10 AD(5)
12
12
7 3
14
14 OUT IN AD(3)
16 16
VIBRATOR
8 4
18 OUT IN
18 SPK- AD(1)
20 G G
20
10 9
3 4 5
SAMSUNG Proprietary-Contents may change without notice
6 7
3.0_MP
R108
100
R104
3.0_MP
47K R109
1K
C104
C105
470PF 470PF
R169
47K
R170
100
R171
C161 100
C162
470PF
470PF
3.0_MA
R110
R111
22K
470
R149
10K
R115
C114 C115
100
470PF 470PF
U609
AD(0:15)
A(0:20)
D0 R12
AD(0)
D1 U10
AD(1)
D2
R11
AD(2)
D3
T10
AD(3)
D4 U9
AD(4)
D5
P10
AD(5)
D6 R10
AD(6)
D7 T9
AD(7)
D8
U8
AD(8)
D9 R9
AD(9)
D10 T8
AD(10)
D11
U7
AD(11)
D12
R8
AD(12)
D13 T7
AD(13)
D14
U6
AD(14)
D15 P7
AD(15)
A0 N16
A(0)
A1
N15
A(1)
A2 U12
A(2)
A3
R13
A(3)
A4
T12
A(4)
A5 U11
A(5)
RAM_CS1
A6 T11
A(6)
A7
P11
A(7) RAM_CS2
A8 R7
A(8)
A(0)
A9 T6
A(9)
A10
MSM3100C U5
A(10) RESET
A11 R6
A(11)
A12
T5
A(12)
A13
T4
A(13)
A14 R5
A(14)
A15 U4
A(15)
A16
T3
A(16)
A17 R4
A(17)
A18
U3
A(18)
A19
U2
A(19)
A20 T2
A(20)
A21
N14
A(21)
A22 M14
A(22)
ROM_CS1_N R15
ROM_CS2_N P4
RAM_CS1_N P14
RAM_CS1
RAM_CS2_N N4
RAM_CS2
GP_CS_N
P6
GP_CS
LCD_CS_N
P12
LCD_CS
LCD_EN P13
LCD_EN
RD_N
R14
LWR_N P16
LWR
HWR_N P15
GND12
L4
GND11 P9
GND10
L15
3.0_MP
R124
47K
R128
C119 C120 C121 C147
1NF 1NF 1NF 1NF
J101
1 2
MIC 1 2
3 4
3 4
5 6
5 6
C150 1NF 7 8
KEY3
7 8
9 10
C151
9 10
C152
11 12
11 12
1NF 13 13 14 SVC_LED_ON
14
1NF
15 16
VBATT 15 16 ON_SW
3.0_MP
17 17 18 18 LED_ON
19
20
19 20
3.0_MP
CD DTR
RI CTS
DP_TX_DATA DSR
DP_RX_DATA RTS
ZD101
R133
ZD102
200K
6 4 3 1
5
6 4 3 1
5 SCL
SDA
2
R134 1K
2
6 7
10-7
SCH-A302
8 9 10
SBDT
SBCK
SBST
DP_TX_DATA LWR1
DP_RX_DATA
DP_TX_DATA2
DP_RX_DATA2
3.0_MP
3.0_MP
C113 C112
CTS
100NF 100PF
RTS 3.0_MP
U103
A(1:20)
J5
VCCF
J6
VCCS 200K
R117
G2 H9
A(1) A0 CIOF
F2 K6 R118 200K
A(2) A1 CIOS
E2 D6
A(3)
A2 CE2S A(22)
A(4) D2 E5
A3 RY/_BY
F3 A4 C6
A(5) _WE LWR
E3 G8
A(6)
A5 SA
D3
A(7) A6
C3
A(8)
A7
C7
A(9)
A8
E7
A(10) A9
F7 AD(0:15)
A(11) A10
C8 J3
A(12) AD(0)
3.0_MP 3.0_MP A11 DQ0
D8 G4
A(13) A12 DQ1 AD(1)
E8 K4
A(14) AD(2)
A13 DQ2
F8 H5
A(15) A14 DQ3 AD(3)
D9 H6
A(16) A15 DQ4 AD(4)
G9 K7
A(17) AD(5)
A16 DQ5
R121 F4 G7
A(18) AD(6)
A17 DQ6
NC E4 J8
A(19) A18 DQ7 AD(7)
D7 K3
A(20) AD(8)
A19 DQ8
E6 H4
AD(9)
A(21) A20 DQ9
J4
DQ10 AD(10)
K5
AD(11)
DQ11 RAM_CS1
J7
DQ12 AD(12)
H2 H7
_CEF DQ13 AD(13)
J2 K8
AD(14)
_CE1S DQ14
H3 H8
AD(15)
_OE DQ15/A-1 RAM_CS2
C4
_LBS
D4
_UBS
C5 G3
_WP/ACC VSS1
D5 J9
_RESET VSS2
R122
R123 200K
0
C116
F10
10NF NC
A1 G1
NC NC
A10 G10
NC NC
B1 L1
NC NC
B5 L5
NC NC
B6 L6
NC NC
B10 L10
NC NC
C1 M1
NC NC
E9 M10
NC NC
F1
NC
F9
NC
HP_DET
RINGER
R125 C117
100 100PF R126 C118
ON_SW_SENSE
100 100PF
SEND_END
100
DSR
DTR
R129
100
RX_AUDIO
C_F
DSR
TX_AUDIO
DP_RX_DATA
DP_TX_DATA
HP_PWR
VBATT
RI
CD
Q160
3 R160 2
2 1
10K
D160
R161
1 3
2K
Q161
VIBRATOR
3
U106
R162 C160
1 NC 1UF
8 2
A0 1
VCC
10V
2
7
WP A1
6 3
SCL A2
4
5 SDA
GND
Time Changed
Changed by 2001.09.18
LJC Date Changed
5:00:42 pm
8 9 10
Circuit description & Circuit Diagrams
11 12
A
VBATT
DGND
HP_PWR
DP_RX_DATA
DP_TX_DATA
LWR
3.0_MP
B
C110
C111
100PF
100NF
A(1:18)
AD(0:15)
U101
1E 6D
VCC1 VCC2
3D 1G
A(18) AD(15)
A17 I/O16
4E 1F
A(17) AD(14)
A16 I/O15
4F 2F
A(16) A15 I/O14 AD(13)
3F 2E
A(15) AD(12)
A14 I/O13
4G 2D
A(14) A13 I/O12 AD(11)
3G 2C
A(13) AD(10) C
A12 I/O11
5H 1C
A(12) AD(9)
A11 I/O10
4H 1B
A(11) A10 I/O9 AD(8)
3H 6G
A(10) A9 I/O8 AD(7)
2H 6F
A(9) AD(6)
A8 I/O7
4D 5F
A(8) A7 I/O6 AD(5)
4C 5E
A(7) AD(4)
A6 I/O5
3C 5D
A(6) A5 I/O4 AD(3)
4B 6C
A(5) A4 I/O3 AD(2)
3B 5C
A(4) AD(1)
A3 I/O2
5A 6B
A(3) AD(0)
A2 I/O1
4A
A(2) A1
3A 2G
A(1)
A0 NC1
1H
NC2
2A _OE 3E
NC3
5B 6H
_CS1 NC4
6A
A(21) CS2
5G
LWR _WE
2B 1D
A(0) _UB VSS1 6E
1A
_LB VSS2
D
E
VCON1
1
C_F 1
2
2
3
3
C651
CD
100NF
RI
F
VCON2
1
VBATT 1
2
V_F 2
3
3
C641
ZD601
100NF
CN101-1
1 12 V_F
2 13
3 14 RTS
R172 0
4 15 VBATT
5 16 VBATT
6 17 CTS
7 18 DTR G
8 19
V100 V101
DP_RX_DATA2
9 20
10 21
V102 V103
11 22 DP_TX_DATA2
R175
0
C128 C129
3.3NF
10NF
H
Engineer LJC COMPANY NAME
Address
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R&D CHK TITLE
A2
DOC CTRL CHK SCH-A302 (i)
MFG ENGR CHK
REV
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QA CHK Drawing Number Sheet of
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