Motorola CP040 - Page 184

3-16 VHF2 PCB 8486342Z13-C Schematic Diagrams
5 V (Rx)
0 V (Tx)
0 V (Rx)
5 V (Tx)
3.3 V (Rx)
0 V (Tx)
0 V (Rx)
3.3 V (Tx)
5 V
3.3 V
3.3 V
3 V
0 V (OFF)
7.5 V (ON)
0 V (OFF)
3.3 V (ON)
7.5 V
0 V (Tx)
0 V (Rx)
5 V (Tx)
5 V (Rx)
0 V (OFF)
7.5 V (ON)
7.5 V (OFF)
0 V (ON)
100
R506
10uF
C312
C302
390pF
10uF
C334
F301
3A
GND
2
1
VIN VOUT
5
C333
.01uF
U310
TK71750S
BYPASS
4
CTRL
3
R310
100K
VR302
MMBZ5250B
20V
C316
1200pF
R509
100K
NC
Q493
3
1
2
100K
R322
C331
.01uF
Q311
100
R507
C323
C313
.01uF
150pF
C321
10uF
C315
1200pF
5.1K
R313
2
NC
20K
R312
4
1
LOW
5
3
HIGH
TAB1
6
TAB2
7
R508
S444
SWITCH
.01uF
C322
100K
33uF
2
6
4
1
3
C303
C320
Q494
.018uF
C301
Q313
390pF
C306
.01uF
Q312
D301
U330
TK71730S
BYPASS
4
CTRL
3
GND
2
1
VIN VOUT
5
.01uF
TP302
1
C304
1%
200K
NC
D3_3V
R321
C314
1200pF
20V
MMBZ5250B
VR301
100K
R311
NC
J301
DATA
NEG
POS
GND
1
INPUT
4
OUTPUT
5
SENSE
6
SHUTDOWN
8
TAP
3
LP2986
U320
ERROR
7
FEEDBACK
2
D3_3V
C305
100pF
C310
.01uF
D3_3V
330K
1%
R320
R510
330K
SWB+
BATT_CHARGE
.018uF
C311
D3_3V
3V
RESET
VOLUME
ON_OFF
5T
USWB+
RX_ENA
5V
TX_ENA
5R
VHF2 (146-174 MHz) DC Regulation Schematic Diagram