Motorola MCS 2000 Service Instructions Manual page 192

Chapter 10: Digrams and Parts Lists
MIC_VOLTAGE
MIC_IN
UNSW_5V
R0437 R0439
4.7K 47K
47K
EMERGENCY
47K
C0444
Q0414
VR0424
470pF
14V
B+_CTRL
R0401
IGNITION
Q0430
47K
R0442
4.7K
68P81083C20-D
Ignition sense changes
Remove R0510 to disable
C0519
R0510
33uF
0
R0440
EMERGENCY_IN
R0518
10K
4.7K
C0446
3
CONT
.01uF
4
RESET
1
DISCH
2
THRESH
C0518
6
TRIG
1uF
C0512
0.1uF
Vdd
R0423
47K
IGNITION_SENSE
C0418
47K 470pF
47K
Q0431
B+_IGNITION
R0511
560
U0510-2
U0510-1
SA556 SA556
R0512
200K 11
CONT
10
RESET
5 13 9
OUT DISCH OUT
12
THRESH
8
TRIG
C0511 C0514
1uF 0.1uF
R0505
4.7K
CR0511
R0513
R0523
200K
10K
47K
Q0510
CR0510
47K
C0513
1uF
R0506
4.7K
+5V SW_B+ +5V
C0442
R0532 R0530
.01uF
47.5K 47.5K
U0401-1
2 8
MC33072
R0534
1
3
0
4
R0533 R0531
47.5K 7.5K
Figure 10-30. Controller, Emergency Ignition Schematic Diagram
10-44
SW_B+_SENSE
B+_ON_OFF
R0527
10K
C0465
1uF
EMER_OUT
A+_SENSE
MAEPF-28104-O
December 6, 2004