Epson TM-U200 Series - Drawer Kick-Out Drive Circuit

Rev. A Mechanism Configuration and Operating Principles 2-25
TM-U200 Series (Type A/AM)Technical Manual
Confidential
Drawer kick-out drive circuit
Activating the DKD1 and DKD2 signals from the CPU (U5) causes a transistor array QM111 to
turn on. This causes transistors Q114 and Q115 to turn on, and the drawer drive signal is output.
The drawer status signal DK_S, which indicates whether or not the drawer is open, is input to
the CPU (U5), allowing the host to check the status via the interface.
The +24 V drawer power supply is supplied via the regulator IC (U2), which cuts off the supply
in case of excessive current.
Figure 2-24 Drawer kick-out drive circuit
+5 V
R28
Q34
C39
D2
C45
G
N
D
VI VO
U2
1
2
3
4
5
6
FG
DKD 1P
DKD SW
+24V
DKD 2P
SG
CN2
DKD
U5
62
63
10
P32
P33
P63
+
C16
+
8{5 V
R13
DC 24-30V IN
4
1
DKD1
DKD2
2
5
3
1
1
2
2
3
3
6
5
4
QM111
+5V
DM133
R117
R118
R113
R112
1
2
3
Q114
Q115