Motorola CP040 Detailed Service Manual page 342

3-32
POS
NEG
DATA
J301
BATT_CHARGE
C302
390pF
VOLUME
ON_OFF
UHF2 (438-470 MHz) DC Regulation Schematic Diagram PCB No. 8416205H02-C/-D
7.5 V
F301
3A
NC
C301
390pF D301
VR301
MMBZ5250B
20V
NC
C305 C306
$V $V VR302
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
6 0 V (OFF)
100 7
R510
330K
1 6
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
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 OUTPUT
0 V (ON) 8
SHUTDOWN ERROR
6
NC SENSE FEEDBACK
3
NC TAP
1
1
VIN VOUT
3
CTRL
4
BYPASS
2
C331
.01uF
UHF2 PCB 8416205H02-C/-D Schematic Diagrams
5 V
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
3.3 V
5
7
2
C322
R320 C321
.01uF
C320
330K 10uF
.018uF
1%
R321
200K
1%
U330
TK71730S
3.0 V
5
C333
.01uF
C334
10uF
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