Epson TM-U200 Series Technical Manual page 65

C o n fid e n tia l
Operation panel
The operation panel is located on the main circuit board and has 3 LEDs (POWER, ERROR, and
PAPER OUT) and 1 switch (FEED). The POWER LED is driven at the same time as +5 V is
supplied by the power supply circuit. The ERROR and PAPER OUT LEDs are driven by U5.
Switch detection is also executed by the U5.
U5
32 PF SW
P82
1 ELED/DSW9
P57/T03
80 PLED/DSW0
P56/INT3/TI2
Rev. A
+5V
QM109
4
3 2
5 1
+5V
R54 R55
1 (POWER) 1 (PAPER)
D13 D12
2 2
Figure 2-22 Operation panel circuit
Mechanism Configuration and Operating Principles 2-23
TM-U200 Series (Type A/AM)Technical Manual
+5V
R41
R56
C17
1 (ERROR)
D11
2
R15
GND
SW2