Figure 12-36. Uhf (438-470 Mhz) Dc Regulation Schematic Diagram (8486348Z13-C) - Motorola CP150 Service Manual

12-46
POS
NEG
DATA
J301
BATT_CHARGE
C302
390pF
VOLUME
ON_OFF

Figure 12-36. UHF (438-470 MHz) DC Regulation Schematic Diagram (8486348Z13-C)

June, 2005
7.5 V
F301
3A
NC
C301
390pF D301
VR301
MMBZ5250B
20V
NC
C305 C306
VR302
100pF .01uF
MMBZ5250B
20V
D3_3V
R506
S444
100
SWITCH
3 HIGH 4 2
2
R508
100K
1 5
SWB+
LOW
7.5 V (ON)
R507
6 0 V (OFF)
100 7
R510
330K
1 6
0 V (ON)
7.5 V (OFF)
3.3 V (ON) 2
0V (OFF)
3 4
Q494
TP302
1
USWB+
U310
TK71750S
1 5
VIN VOUT
3
CTRL
4
BYPASS
2
C303 C304 C310
.01uF .01uF
33uF
D3_3V
R313
10K
RX_ENA
TX_ENA
0 V (Rx)
3.3 V (Tx)
7.5 V (ON)
0 V (OFF)
3
1
Q493
R509
100K
U320
LP2986
4 5
INPUT OUTPUT
8 7
SHUTDOWN ERROR
6 2
SENSE FEEDBACK
NC
3
NC TAP
1
U330
TK71730S
1 5
VIN VOUT
3
CTRL
4
BYPASS
2
C331 C334
.01uF 10uF
UHF (438-470 MHz) Schematic Diagrams, Overlays, and Parts Lists (8486348Z13-C)
5 V
C313
C311 C312
.01uF
.018uF
10uF
C314 R310
1200pF 100K
R312
0 V (Rx)
20K
5 V (Tx)
C315
1200pF
3.3 V (Rx)
0 V (Tx)
Q313
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
C321
R320
.01uF
C320 10uF
330K
.018uF
1%
R321
200K
1%
3.0 V
3V
C333
.01uF
5V
5R
5 V (Rx)
0 V (Tx)
Q311
5T
0 V (Rx)
5 V (Tx)
6880309N62-C