![background image](http://html.mh-extra.com/html/samsung/sgh-2100/sgh-2100_service-manual_1190234031.webp)
5-5
Schematic Diagrams
5-5 Modulator & Tx Vco
5
TXL02
5
5
5
5
TXEN1
5
TXGSM
5
TXDCS
5
QTX
TXL01
ITX1
QTX1
5
+3VMD
5
5
5
5
DCSTX1
ITX
12pF
C539
BANDSEL
5
GSMTX1
C523
470
R515
1.5nF
+3VMD
270pF
C524
C531
10nF
6pF
C516 100pF
R529
1K
C540
C538
NC
R526 330
R531
0
1nF
C522
R521 11K
100pF
C521
X500
CONTROL
GND1
GND2
GND3
GND4
OUTPUT
SUPPLY
68nH
L503
3R9
R514
C515
+3VMD
33nH
R520 51
L504
22pF
C507
27nH
68pF
R510 200
R527
10
L500
C509
+3VMD
CONTROL
GND1
GND2
GND3
GND4
OUTPUT
SUPPLY
+3VMD
100pF
L507
X501
R525
820
27nH
NC
C537
51
R519
+3VMD
2N7002
Q500
D
G
S
+3VTXVCOGSM
100pF
C508
+3VTXVCOGSM
+3VMD
L502 68nH
100K
R528
+3VMD
4.7pF
C528
U501
TP0101T
D
G
S
100pF
C510 27pF
R512
C502
TP0101T
U502
D
G
S
910
240
R522
+3VTXVCODCS
+3VTXVCODCS
1uF
R500 10
C534
R530
NC
100nF
C500
12pF
C514
1uF
C535
470
R516
10
R503
0
C525
SOT
51
R505
1nF
C526
C504
R511
1uF
NC
27pF
R523 3R9
C536
C511
C533 1uF
56nH
L501
GND3
10
GNDP
I
28
MC
15
3
MDLO
5
MDO
20
MIXLO
MIXO
25
R504 10
PUMIX
1
Q
RD
13
RF
22
7
VS1
VS2
21
26
VS3
VSP
8
PLL
U500
CPC
11
CPO
9
4
GND1
GND2
18
24
C503
16
ND
NI
27
6
NMDO
NND
17
NQ
2
14
NRD
23
NRF
19
PU
12
C501
100pF
R501
100pF
12pF
10
C518
C512
10
C517
56pF
R502 10
R524
L505
27pF
33nH
SOT
C532
27pF
C520
27pF
C529
56pF
C519
C513 68pF
470
R518
22pF
C505
C530 27pF
10
R517
C527
R507 910
C506
NC
+3VMD
22pF
0805
COG
0603
COG
1608
1608
1608
0603
0603
1608
1608