
Operating Principles
Rev. A
2-11
Table 2-7. Functions of the Paper Feed Sensor
Sensor
Detection
Function
Paper width measurement
(detects the left and right
paper edges)
Selects the left and right margins.
Right/left
PEW
sensors
Paper bottom detection
(detects the rear edge.)
Depending on o the CR position,
one of the sensors is used.
If one of the sensors detects
paper, it is regarded “Paper is
loaded”. If both sensors don’t
detect paper, it is regarded “No
paper is loaded”.
Paper end detection
Ensures the paper feed and paper
eject action.
Left
PEW
sensor alone
Leading edge detection at
loading paper
(detects the paper top.)
Determines the top margin.
Front/Rear paper
sensors
Detects the leading/rear
edge of the paper.
Determines the top/bottom margin.
Paper end detection
Ensures the paper feed and paper
eject action.
Rear paper sensor
alone
Detects the leading/rear
edges of the paper
Detects the leading edge and
printable area for the black-solid
print paper.
Front paper sensor
alone
Detects the leading edge of
the paper
Performs front paper feeding.
Paper jam sensor
Paper jam detection
Detects paper jam condition in the
front/rear paper feed direction.
Notes)
1. When the printer is powered on, if any of the right/left PEW sensor and front/rear paper
sensor detects paper, the printer does not detect the leading edge of the paper but the
paper end condition.
2. Left and right margin for cut sheet and continuous paper are switched by the release
sensor.
Black solid mode
This printer is equipped with the black solid print mode. In this mode, the printer prints
regardless of the reflection rate of the paper.
Paper jam detection
The paper jam sensor monitors a signal output for each step (1/216 inch per step). If the
output signal becomes the same as the one for power on time and the following signals
for the specified numbers of steps remain the same, the status is regarded as the paper
jam error, and the CPU indicates the paper jam error.
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 ...