![background image](http://html.mh-extra.com/html/samsung/sgh-2100/sgh-2100_service-manual_1190234040.webp)
5-14
Schematic Diagrams
5-14 Control Logics
4
OUT
TC7S08FU
U906
5
+
3
-
1
IN1
2
IN2
4
OUT
DCSTX1
REFTXN
REFTXP
DCSTX2
TC7S00FU
U903
5
+
3
-
1
IN1
_BANDSEL
GSMTX2
GSMTX1
TXEN2
TXEN1
BANDSEL
RXEN_FE
REFADCP
REFADCN
RXEN_FEDCS
RXEN_FEGSM
2
IN2
4
OUT
TC7S08FU
U901
+
5
-
3
IN1
1
IN2
2
OUT
4
C903
332_1%
R900
100nF
A
332_1%
R902
A
AVCC
C901
2.2K_1%
R901
R907 10K
100nF
D
U905
GND
INA
2
1
NC
OUTY
4
5
VCC
A
TC7S04FU
3
+
5
-
3
IN1
1
IN2
2
OUT
4
AVCC
+3VBB
10K
R906
100nF
C902
TC7S00FU
TC7S08FU
U904
U902
+
5
-
3
IN1
1
IN2
2
OUT
4
100nF
A
C905
A
1.2K_1%
C904 100nF
+3VBB
D
A
R903
TC7S08FU
1.2K_1%
R905
U900
5
+
3
-
1
IN1
2
IN2
10K_1%
R904