Sharp GX20 Service Manual - Page 124
Schematic Diagram 21/24
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GX20 KEY PWB-B (1/2) A TCXOEN B RFON TXON C319 0.1 CONFIDENTIAL 1 Cont Vin 5 Np(Vref) Vout 4 1 0V 1 0V 2 0V 3 2 GND Q304 EMG9 3 C320 IC304 TK11129CSIL 2.9V REGULATOR 0.01 2 5 2.88V 4 2.87V 3 R351 1.2K R352 1.2K C323 1 R350 2.2K Q309 2SA1955 A 2.9V VRF VRF TP319 2.9V VTXVCO G VTXVCO G 5-30 (2-C) C D E F 2 3 TP324 C326 L314 47P(CH) FERRITE BEADS () L315 FERRITE BEADS D308 RSB6.8S G SIMCLK,SIMIO,SIMRST H NOTES ON SCHEMATIC DIAGRAM can be found on page 5-1. 1 2 3 4 5 6 Figure 23 SCHEMATIC DIAGRAM (21/24) 5 - 28
GX20
5 – 28
CONFIDENTIAL
Figure 23
SCHEMATIC DIAGRAM (21/24)
A
B
C
D
E
F
G
H
1
2
3
4
5
6
KEY PWB-B (1/2)
G
VTXVCO
VRF
2.9V
GND
Cont
Np(Vref)
Vin
Vout
1
2
3
4
5
TP319
1
2
3
4
5
G
VRF
2
3
TP324
0V
2.88V
2.87V
0V
0V
VTXVCO
2.9V
SIMCLK,SIMIO,SIMRST
RFON
TXON
TCXOEN
(
)
1
2
3
5-30 (2-C)
R351
1.2K
IC304
TK11129CSIL
2.9V REGULATOR
R350
2.2K
Q304
EMG9
Q309
2SA1955 A
R352
1.2K
C320
0.01
C323
1
C319
0.1
L315
FERRITE BEADS
L314
FERRITE BEADS
C326
47P(CH)
D308
RSB6.8S
NOTES ON SCHEMATIC DIAGRAM can be found on page 5-1.