Motorola CP040 Detailed Service Manual page 74

3-16
POS
NEG
DATA
J301
BATT_CHARGE
C302
390pF
VOLUME
ON_OFF
UHF1/2 (403-440MHz and 438-470MHz) DC Regulation Schematic Diagram (PCB 8416205H02-C/-D)
7.5 V
F301
3A
NC
C301
390pF D301
VR301
MMBZ5250B
20V
NC
C305 C306
VR302
$V $V
100pF .01uF
MMBZ5250B
20V
D3_3V
R506
S444
100
SWITCH
3 HIGH 4
2
R508
100K
1 5
SWB+
LOW
7.5 V (ON)
R507
0 V (OFF)
6 7
100
R510
330K
1 6
3.3 V (ON) 2
0V (OFF)
3 4
Q494
1
USWB+
1
VIN VOUT
3
CTRL
4
BYPASS
2
C304 C310
C303
.01uF
33uF .01uF
RX_ENA
TX_ENA
7.5 V (ON)
0 V (OFF)
2 3
1
Q493
R509
100K
U320
LP2986
4
INPUT
0 V (ON) 8
SHUTDOWN
6
7.5 V (OFF)
SENSE FEEDBACK
NC
3
NC TAP
1
TP302
1
VIN VOUT
3
CTRL
4
BYPASS
2
C331
.01uF
U310
TK71750S
5 V
5
C313
C311
C312
.01uF
.018uF
10uF
D3_3V
C314
1200pF
R313 R312
0 V (Rx)
10K 20K
5 V (Tx)
3.3 V (Rx)
0 V (Tx)
0 V (Rx)
3.3 V (Tx)
Q313
R311
100K
5 V (Rx)
0 V (Tx)
3.3 V
C323
150pF
R322
100K
D3_3V
5 3.3 V
OUTPUT
7
ERROR
2
C322
C321
R320
.01uF
C320
330K 10uF
.018uF
1%
R321
200K
1%
U330
TK71730S
3.0 V
5
C333
.01uF
C334
10uF
Controller Schematics
5V
5R
5 V (Rx)
0 V (Tx)
Q311
R310
100K
C315
1200pF
5T
0 V (Rx)
5 V (Tx)
Q312
C316
1200pF
RESET
D3_3V
3V