Figure 8-20. Nld8910B Vhf Dc Power Circuits - Motorola ASTRO XTS 5000 Detailed Service Manual

8-32
E4
BATT
3 C1
C2
2
VR1 .01uF 1uF
NC
20V
1
BATTERY SENSE BS
3 C12
330pF
2
VR2
NC
20V
1
L2
VSW1
100uH
47K
SB+

Figure 8-20. NLD8910B VHF DC Power Circuits

July 21, 2004
E1
F901
L1
47uH
32V
2A
C14 C13
1uF 1uF
Q1
D1
R1
100K
V38
Q503
U1
E5
LP2989
4
INPUT
8
SHUTDOWN
6
SENSE
Q2
C21
1
BYPASS
10uF
C3 C4
47K
10uF .01uF
V38
E6
3
VEN
1
VIN
4
BYPASS
C6 C7
1uF .01uF
V5A
U3
LP3985
E7
3
VEN
1
VIN
4
BYPASS
C9
C10
1uF
.01uF
V38
E8
3
VEN
1
VIN
4
BYPASS
C18 C19
1uF .01uF
RAWB+
FB+ Fused B+
XB+ Transmit B+
5
OUTPUT V5A 5V Analog Supply
7
ERROR ERR
2
NC NC
C5
10uF
D2
U2
LP3985
5
VOUT V3D 3V Digital Supply
GND
C8
1uF
D3
5
VOUT V3A 3V Analog Supply
GND
C11
1uF
D4
U5
LP3985
5
VOUT V3B 3V Misc Supply
GND
C20
1uF
63B81096C58-O
Schematics, Board Overlays, and Parts Lists: Transceiver (RF) Boards
6881094C31-D