Samsung SCH-A302 Service Manual page 53

6. RF Circuit Diagram
1 2
A
CN301
1
1
2
2
3
3
L302
NC
L320 L303
2.7nH NC
R636
10K
1
LNA_GAIN
B
CN302
1
1
2
2
3
3
4
4
5
5
6
6
C652
1NF
F302
18 C398
C
ANT 1NF
3 13
TXOUTPUT TX RX
20 19 17 16 15 14 12 11 10 9 8 7 6 5 4 2 1
3.0_RX
R501
3.0_MP
2 1
Q501
C501
D
10NF
1
2
V_F_CON R504
4.7K
3
C504
R508
1K 10NF
V_F
C505
NC
V_IN
C509
E
33UF
6.3V
SBDT
SBCK
SBST
KBDPWR_ON
PS_HOLD
VBATT 4
G
3
Q505
6 5 2 1
C532
3.0_MP
F R631
2.2UF
100K
16V
R607
0
R632
100K
C663
HP_DET
R629
1NF
3
82K 1
2
3.0_MP
Q509
R630
TCXO
NC
TCXO_ON_OFF
R534
G NC
R535 R536
HP_PWR
VBATT
0 6.8K
R538
NC
R518
NC
R537
10K
Q507
3
2 3.0_MP
1
C545 R539 R540
R541
NC 100K 100K
100K
H
R542 R543 3
1
ON_SW
Q508
4.7K 22K 2
R544
100K
C546
NC
1 2
3 4 5
3.0_RX
L322
R376
10
C389
C388 10UF
100NF
6.3V
C395 R373
4.7NF 10
3
L327
Q350
R374 8.2nH
2 U360
1K
1
6
VREF/PD SEL
2 5
GND1 GND2
3 4
RFIN RFOUT
R371
L324 10
47nH
C393
C390 D351
4.7NF
18PF
C385 C382
L325
R375
33NF 3.9nH 1NF
0
D350
C391 R377
470
18PF
R502
2.7K
R503
C502 C503
8.2K
10NF 10NF
C506
C507
33UF C508
100PF
6.3V 100NF
3.0_MC
U501
C2 D7
HKADC7 VDD1
C3 G6
HKADC6 VDD2
D1 H6
R515
HKADC5 VDD3
D2 G8
10K
KHADC4 VDD4
D3 A3
HKADC3 VDD5
C1
VDD6
E4 SBDT B4
REF_BYP
E3 A7
SBCK XTAL_BYP
H4 3.0_MP
SBST
B7
PON_RESET/
A8 B8
KBDPWR_ON MSM_INTERRUPT
A4
PS_HOLD
C542 D8
VREG_MSMP
H3 E8
CCNT1 VREG_MSMC
G3 D6
CCNT2 VREG_MSMA
F1 H7
10NF
CHARGER_SEL VREG_IF
H8
VREG_SYNT
F2 G7
GATE_LIMIT VREG_TCXO
H1 G5
VCHARGER VREG_RF_TX
H5
VBATT VREG_RF_RX
G1
CHG_FET/
F3 A1
ICHARGE RINGER_DRV
G2 B2
R521 ICHARGEOUT LCD_DRV
H2 A2
0 BATVOLT KEYBD_DRV
B3
R519
VIBRATOR_DRV
F4 VBAT1 F8
EL_INTENSITY
E2
BAT1_FET/
A5
XTAL_OUT
G4 A6
VBAT2 XTAL_IN
C510
E1 C5
100NF BAT2_FET/ SLEEP_CLK
B6
NC
B5 C8
COIN_CELL TCXO_OUT
B1
RINGER_TONE
C7 C4
TCXO_IN RESERVED
C6
SCI_IN R532
R524 NC
0
R529
0
C515 C513
PS_HOLD R528
27PF
1UF
10M
R531
0
C516
KBDPWR_ON 10NF
ON_SW_SENSE
R552
1K
RINGER
3 4 5
SAMSUNG Proprietary-Contents may change without notice
6 7
3.0_RX
L321
C379
C378
R370
10UF
100NF
10
6.3V
L329
C377
18nH
1NF
C380 C381 C372
L331
100PF 10PF 1NF 270nH
C383 F303 C375 U361
L328
3PF 2PF
18nH
1
IFIN 8
IN OUT RFIN
2 5
2
G G G G
GND GND
3
1 3 4 6 L330 C374
R372
VD IFOUT
NC NC
1.2K
4
LOIN BPC
L332
12nH
C373 C376
100PF 3PF
3.0_MP
R506
1K
R507
3 Q503
22K R523
2
EL_EN_A Q502
NC
3
1 1
2
R509 R512
R511
36
3.3K 36
R514
0
RX_AGC_ADJ
RESET
MSM_INT
3.0_MC
3.0_MA
3.0_IF
3.0_SYN
3.0_TCXO
3.0_TX
3.0_RX
NC
X501
2
1
3
4
SLEEP_CLK
NC
L501
MSM_TCXO 3.0_MP
C568
1NF
R554 1.2K
RFT-IFR_TCXO
C514 C567
27PF 150PF
C527
C539 4.7UF
100PF
3.0_SYN
V_IN
AU501
3
2 1
C533
C540
3
100PF 1UF
1 D501
10V
2
Q511
6 7
10-9
8 9 10
L323
C566
220nH
1NF
7
C371 C370 10
IN+
22PF 7PF
6
9 IN-
5
G1 G2 G3
1 2 3
L311
180nH
RX_LO
3.0_IF
L318
LED_ON
U302
C333 37 27 28
10UF C334 C335
4
6.3V 10NF 100PF
VDD1 CHIPX8
6
VDD2
14
3.0_MP 3.0_IF
VDD3 RXQD3
15
R510
VDD4 RXQD2
36 17
VDD5 RXQD1
20
VDD6 RXQD0
24
VDD7
35
VDD8
44
VDDM RXID3
C337 RXID2
36
TCXO
100PF
C338
10NF 11
RXIF CDMA_IF FM_RX_QDATA_RXID0
12
_RXIF
CDMA_IF/
R312 RM_RX_CLK
1K FM_RX_STB
7
VCONTROL
FM_RX_IDATA_RXID1
C339 10
3.0_IF
C340 FM_IF
4.7NF 9
FM_IF/
10NF
GND1
GND2
32
SBCK SBCK_SLEEP/ GND3
30
R313 SBST
SBST_IDLE/ GND4
31
33K SBDT SBDT_FM/ GND5
26
SBI_EN GND6
29
SLEEP FM_SLOT GND7
GND8
33
C341
DNC GND9
100NF
GND10
21 22 25
C320
IFR_TCXO
R380
51
R378 NC
C321
6PF
3.0_MC 3.0_MA 3.0_IF
L319
R553
68nH
0
C517
C519 C520
C523 C524
C528 C529 C530 C531 C522
100PF 4.7UF 100NF
1UF 100NF
100NF 100PF 2.2UF 100NF 100PF
10V
16V
3.0_TCXO 3.0_TX 3.0_RX
C392 C397 C394
C525 C538
C534 C535 C536 C537 C526
100NF
100PF 10UF
4.7UF 100NF
100NF 100PF 1UF 100NF 100PF
6.3V
16V
10V
Changed by LJC Date Changed 2001.09.18
8 9 10
SCH-A302 Circuit description & Circuit Diagrams
11 12
A
B
F301 L307 C319 C318
270nH NC 5PF
OUT+ 5
RXIF
OUT- 4
G4 G5 G6 _RXIF
6 7 8
C323
5PF
C
R330
1K
Q_OFFSET
I_OFFSET
R331
1K
D
C331 C332
1NF 1NF
38
CX8
C_RX_QD(0:3)
39 C_RX_QD(3)
40
C_RX_QD(2)
41 C_RX_QD(1)
42
C_RX_QD(0)
C_RX_ID(0:3)
45 C_RX_ID(3)
46 C_RX_ID(2)
E
48 C_RX_ID(0)
1
2
47
C_RX_ID(1)
3
5
8
13
16
18
19
23
34
43
F
C342
R315
1NF
330
RX_IF_IN
C343
R316
150PF
10K
D302
C344
4.7PF
R317
R318
10K
0
RX_IF_DO
G
D303
C346
C345
150PF
R319
4.7NF C349
910
33NF
C350
4.7UF
6.3V
H
COMPANY NAME
Engineer LJC
Address
Drawn by LJC
City
Size
TITLE
R&D CHK
A2
SCH-A302 (i)
DOC CTRL CHK
MFG ENGR CHK
Time Changed REV
Drawing Number Sheet 3 of 3
QA CHK
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