Figure 7-36. Vhf (146-174 Mhz) Dc Regulation Schematic Diagram (8486342Z09-A) - Motorola CP150 Service Manual

7-30
POS
NEG
F301
DATA
J301
BATT_CHARGE
C302
C305
390pF
100pF
VOLUME
ON_OFF

Figure 7-36. VHF (146-174 MHz) DC Regulation Schematic Diagram (8486342Z09-A)

June, 2005
USWB+
7.5 V
3A
NC
C301
C303
390pF D301
VR301
10uF
MMBZ5250B
20V
NC
C306
VR302
.01uF
MMBZ5250B
20V
D3_3V
R506
S444
100
SWITCH
2
3 HIGH 4
2
R508
100K
1
1 5 Q493
SWB+
LOW
7.5 V (ON)
R507
6
100 7
0 V (OFF)
R510
330K
1 6
0 V (ON)
7.5 V (OFF)
2
3.3 V (ON)
0 V (OFF)
3 4
Q494
U310
TK71750S
1 5
VIN VOUT
3
CTRL
4
BYPASS
2
C304 C310 C311
.01uF .01uF .018uF
D3_3V
R313 R312
20K 20K
RX_ENA
3.3 V (RX)
0 V (TX)
TX_ENA
0 V (RX)
3.3 V (TX)
3 7.5 V (ON)
0 V (OFF)
R509
100K
U320
LP2986
4 5
INPUT OUTPUT
8 7
SHUTDOWN ERROR
6 2
NC SENSE FEEDBACK
3
NC TAP
1
C320
.018uF
U330
TK71730S
1 5
VIN VOUT
3
CTRL
4
BYPASS
2
C331 C334
10uF
.01uF
VHF (146-174 MHz) Schematic Diagrams, Overlays, and Parts Lists (8486342Z09-A)
5 V
5V
C313
C312
.01uF
10uF
5R
5 V (RX)
0 V (TX)
Q311
C314 R310
1200pF 100K
0 V (RX)
5 V (TX)
C315
1200pF
5T
0 V (RX)
Q313
5 V (TX)
R311
Q312
100K
5 V (RX)
0 V (TX)
C316
1200pF
3.3 V
RESET
C323
150pF
R322
100K
D3_3V
3.3 V
D3_3V
C322
R320 C321
.01uF
330K 10uF
1%
R321
200K
1%
3.0 V
3V
C333
.01uF
6880309N62-C