2-24
Mechanism Configuration and Operating Principles
Rev. A
C o n fid e n tia l
Various detector circuits
When the printer detects paper, the paper detector at the paper inlet turns the input signal to the
CPU (U5) LOW. This detector also functions as the semi-automatic loading detector.
A home position sensor is provided to detect the print head position. The input signal to the
CPU (U5) becomes LOW when home position is detected.
A near-end detector is an option that detects the remaining amount of a paper roll. The input
signal to the CPU (U5) becomes LOW when a paper near-end is detected.
Figure 2-23 Various detector circuits
Host interface circuit
The printer has universal interfaces for connection to the host computer. There are three kinds of
interfaces:
❏
EIA/TIA RS-232 interface
❏
IEEE 1284 interface
❏
EIA/TIA RS-485 interface
See the interface circuit board diagrams in the Appendix.
4
3
1
2
CN8
4
2
3
1
1
2
2
1
CN11
R40
R37
R39
R16
R36
R38
C23
C22
C46
R53
Mechanism 1
Mechanism 2
C44
+5V
+5R
GND
NEC
HPC
REC
NE
HP DET
RE
P62/AN2
12
P64/AN4
9
11
P65/AN5
U5
1
2
1
2
GND
+5V
R.E
H.P
N.E
GND
Printer mechanism
+5V
Summary of Contents for TM-U200 Series
Page 6: ...iv Confidential Revision Sheet Revision Page Altered Items and Contents Rev A ...
Page 72: ...2 30 Mechanism Configuration and Operating Principles Rev A Confidential ...
Page 172: ...6 Appendix Rev A Confidential Main Circuit Board Parts Layout ...
Page 176: ...10 Appendix Rev A Confidential ...
Page 186: ...Rev A Appendix A 20 TM U200 Series Type A AM Technical Manual Confidential ...
Page 187: ...Confidential SEIKO EPSON CORPORATION Printed in Japan ...
