
DLQ-3000+
Rev. A
2-30
2.3.11 Paper Jam Sensor
This printer is equipped with the paper jam sensor mechanism which consists of the
magnetized roller attached to the same shaft for the sub loading roller assembly and the
sensor (hall element) located beside the rear paper sensor. Having no contact with the
loading drive roller assembly, the magnetized roller rotates independently along paper.
Table 2-20 shows the paper jam sensor specification.
Table 2-20. Paper Jam Specification
Detecting element
Hall element
Outputs
In 1 channel, TTL level
Power supply voltage
5 VDC
±
5%
P A 7
P a p e r F e e d D r i v e R o l l e r A s s e m b l y
P a p e r
P a p e r J a m S e n s o r
( H a l l S e n s o r )
P J A M
M a g n e t i z e d R o l l e r
C P U
Figure 2-23. Paper Jam Sensor Block Diagram
The CPU reads the signal output directly from the paper jam sensor for each step (1/216
inch / step). If the current signal condition is the same as the previous one, it indicates the
status that the magnetized roller is not rotating, which is considered paper jam. When the
printer detects that condition continuously for the specified numbers of the output signals, it
indicates the paper jam error, and enters non-printing status. The paper jam signal
conditions for normal state and paper jam state are shown in Figure 2-24.
C u r r e n t l y d e t e c t e d c o n d i t i o n
P r e v i o u s l y d e t e c t e d c o n d i t i o n
N o r m a l P a p e r F e e d i n g C o n d i t i o n
P a p e r J a m C o n d i t i o n
Figure 2-24. Paper Jam Sensor Signals
Paper jam detection starts after each paper loading motion regardless of the paper feed
direction. However, the sensor ignores the pulse output while the paper feed direction is
changed.
Содержание DLQ-3000 Minerva+
Страница 1: ...EPSON 24 PIN DOT MATRIX PRINTER EPSON DLQ 3000 SERVICE MANUAL SEIKO EPSON CORPORATION 4008259 ...
Страница 5: ...v REVISION SHEET Revision Issued Data Contents Rev A August 21 1997 First Release ...
Страница 61: ...2 3 12 Other Sensor Circuits 2 31 ...
Страница 160: ...Chapter 6 Maintenance 6 1 Maintenance 6 1 6 1 1 Lubrication and Adhesion 6 1 ...
Страница 171: ...DLQ 3000 Rev A A 6 ...
Страница 172: ...Appendix Rev A A 7 A 2 Circuit Diagrams Figure A 2 C210 MAIN Board Circuit Diagram 1 2 ...
Страница 173: ...DLQ 3000 Rev A A 8 ...
Страница 174: ...Appendix Rev A A 9 Figure A 3 C210 MAIN Board Circuit Diagram 2 2 ...
Страница 175: ...DLQ 3000 Rev A A 10 ...
Страница 177: ...DLQ 3000 Rev A A 12 Figure A 5 C124 PSB Board Circuit Diagram ...
Страница 179: ...DLQ 3000 Rev A A 14 A 3 Circuit Board Component Layout Figure A 7 C210 MAIN Board Component Layout 1 2 ...
Страница 180: ...Appendix Rev A A 15 Figure A 8 C210 MAIN Board Component Layout 2 2 ...
Страница 181: ...DLQ 3000 Rev A A 16 Figure A 9 C124 PSB Board Component Layout ...
Страница 182: ...Appendix Rev A A 17 Figure A 10 C124 PSE Board Component Layout ...
Страница 189: ...EPSON SEIKO EPSON CORPORATION ...