Panasonic UF-5500 Service Manual page 40

UF-5500 / 4500
<Stop operation>
In order to stop the motor rotation, following 2 signals are supplied from IC300.
1. SS signal (Output pin: Pin B12/Output Signal: "L")
When this signal is inverted by transistor Q502 and becomes "H", motor recognize this signal as "stop" signal.
2. Brake signal (Output pin: Pin C12/Output Signal: "L")
When this signal is inverted by transistor Q526 and becomes "H", motor recognize this signal as "brake on" signal.
Timing Chart of Stop operation
6.7.1.1. Engine Motor Drive Circuit
IC300
D12
MMB
B12
MMXA
A12
MMA
C12
MMXB
+3.3V +24V
L502
R515
Q502
C510
Q525
Main PCB
CN502
1
+24V
+24V
2
PGND
3
4 PGND
LD
5
START/STOP
6
CLK
7
8
BRAKE
Q526
40
DC BRUSSILESS MOTOR
1
2
3
4
5
6
7
8