Motorola CP040 Detailed Service Manual page 120

3-14
POS
NEG
DATA
J301
BATT_CHARGE
C302
390pF
VOLUME
ON_OFF
VHF1 (136-162 MHz) DC Regulation Schematic Diagram (8486769Z02-A)
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
2
3 HIGH 4
2
R508
100K
1 5
SWB+
LOW
7.5 V (ON)
R507
6
100 7 0 V (OFF)
R510
330K
0 V (ON)
7.5 V (OFF)
1 6
2
3.3 V (ON)
0 V (OFF)
3 4
Q494
TP302
1
USWB+
U310
TK71750S
1 5
VIN VOUT
3
CTRL
4
BYPASS
2
C304 C310
C303
.01uF
33uF .01uF
D3_3V
R313
5.1K
RX_ENA
TX_ENA
0 V (Rx)
3.3 V (Tx)
7.5 V (ON)
3
0 V (OFF)
1
Q493
R509
100K
U320
LP2986
4 5
INPUT OUTPUT
8 7
SHUTDOWN ERROR
6 2
NC SENSE FEEDBACK
3
NC TAP
1
U330
TK71730S
1 5
VIN VOUT
3
CTRL
4
BYPASS
2
C331 C334
10uF
.01uF
VHF1 PCB 8486769Z02-A Schematic Diagrams
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
R320 C321
.01uF
C320
330K 10uF
.018uF
1%
R321
200K
1%
3 V
3V
C333
.01uF
5V
5R
5 V (Rx)
Q311
0 V (Tx)
5T
0 V (Rx)
5 V (Tx)