Figure 7-38. Hud4022A Power Supply Schematic - Motorola ASTRO XTL 1500 Detailed Service Manual

7-46
DC DISTRIBUTION
VOLTAGE V(operating)/mA(max) SOURCED BY: SUPPLY FOR
Battery SW_B+ Audio PA
FILT_B+
VCC1.8, VCC1.55 1.86 & 1.55 / 100 mA VCC5 Patriot, EIM, Memory
VCC2.85 2.85 / 100 mA VCC5 I/O Ring, EEPOTs
USB, Codec
VCC3 3.0 / 100 mA VCC5 Power Control
VCC5 5.0 / 500 mA SW_B+ T-Gates, VIP S, SB9600
Voltage Translation
1.8V, 3V Regulators
UNSW_5V 5.0 / Battery A+ Emergency Detect/Timer
SW_B+ Battery A+ FILT_B+
SW_B+ Sense Circuit
9V Regulators
9.3V_TX 9.3V / 1A A+ Mic Bias Circuit
EMERGENCY
IGNITION
9V Regulator
VCC9
SW_A+
U0500
4 LM2941 5
VIN VOUT
2 1 R0528
C0534
ON_OFF ADJ
7.5K 0.1uF
C0531 C0532 R0526
0.1uF 1uF 100 R0529 C0533
1.2K 22uF
5V Regulator
VCC9
U0503
MC78M05
1 3
IN OUT
GND
2
C0516 C0517 C0535
0.1uF 4.7uF 0.1uF
9.3V_ABACUS
U0505
MC78M05
1 3
IN OUT
GND
2
C0520 C0521 C0522
0.1uF 4.7uF 4.7uF

Figure 7-38. HUD4022A Power Supply Schematic

June 15, 2005
Emergency Sense Block
UNSW_5V UNSW_5V
R0527
0
NP
R0523 R0503
100K 100K
47K
Q0501
UNSW_5V
47K
C0500 C0524
0.1uF 0.1uF
R0516
100K
A+ R0524 R0520
10K
47K
C0502
NP
100pF
VCC2.85 SW_A+
VCC2.85
R0505 R0506
10K 10K
6 8
7
SW_B+_SENSE
5
4
R0508 U0604
MC33202
10K
SW_B+_ON-OFF
R0509
2K C0503
47K
100pF
VCC5 U0504
47K 53D46
2 1
OUTPUT
Q0505 INPUT
5 4
CD NC
GND
3
C0519
.01uF
VCC5_FILT
VCC5
1.55V Digital Supply Regulator
R0519
10
C0518
4.7uF
R0513
VCC5_FILT
39K
5V_ABACUS VCC5
8
INPUT
7
FEEDBACK
3
SHUTDOWN
C0537
1uF
NP R0525
C0514 C0515
C0523 150uF 0.1uF 100
0.1uF
R0514
0
MOTOROLA PROPRIETARY CONFIDENTIAL
UNSW_5V
D0501
R0500 R0502
100K 390K
SOFT_TURN_OFF
U0506
SW_B+_ON-OFF
LMC555
4
RESET
3
OUTPUT
2
TRIGGER
SW_B+_ON-OFF
1
6
THRESHOLD
7 2 4
DISCHARGE
5
CONTRLVOLTAGE
U0508
NC7SZ125
8
VPOS
VCC2.85
GND
1
C0525
1uF
R0504
100K
Q0500
47K
47K
C0505
.01uF
2.85V Digital Supply Regulator
R0510
R0511
43K
33K
VCC5
VCC2.85
U0501
LP2951CD
8
1
INPUT OUTPUT
7
5
FEEDBACK ERROR
3
2
SHUTDOWN SENSE
6
VTAP
C0527 C0512
C0513
GND
4.7uF 0.1uF
150uF
4
1.8V Digital Supply Regulator
C0506 .01uF
R0512
VCC5_FILT
R0521
10K
39K
VCC1.55
U0502
LP2951CD
1
OUTPUT
5
ERROR
2
SENSE
6
VTAP
C0510 C0528
GND
4.7uF 0.1uF
4
Schematics, Component Location Diagrams, and Parts Lists: HUD4022A (VHF) Main Board
1
TP0500
TEST_POINT
Q0502 A+
47K
47K
VR0501
R0531
11V
A+
100K
Q0504 Q0503
SW_A+
47K
R0515
1K
47K
C0507
0.1uF
EMERG_SENSE
IGNITION_SENSE
A+ UNSW_5V
R0507
10K
VR0500
5.1V
C0504
0.1uF
UNSW_5V Supply
VCC2.85
VCC2.85 PWR_GND
VCC
C0536
GND
0.1uF
3
R0518
10K
LV_DETECT
C0526
.01uF
R0522
20K
VCC1.8
U0507
LP2951CD
8 1
INPUT OUTPUT
7 FEEDBACK 5
ERROR
2
3 SHUTDOWN
SENSE
6
VTAP
GND
C0529
4
4.7uF
73D02970C73-O
SHEET 9 OF 23
U0508
6815854H01-A