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

C o n fid e n tia l

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.
DKD
CN2
1
FG
2
DKD 1P
3
DKD SW
4
+24V
5
DKD 2P
6
SG
Rev. A
Q114
2
1
R112 R117
3
Q115
R118
2
1
R113
3
D2
U2
VI VO
G
N
+
D
C45
DC 24-30V IN
Figure 2-24 Drawer kick-out drive circuit
TM-U200 Series (Type A/AM)Technical Manual
+5V
QM111
4
DM133
3
1 6
2 5 5
3 4
+5 V
R28
C39
+
C16
Mechanism Configuration and Operating Principles 2-25
2
1
DKD1
DKD2
8{5 V
R13
Q34
U5
62
P32
63
P33
10
P63