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EPSON Stylus Scan 2000
Revision A
Operating Principles
Scanner Mechanism Operation
45
2.3.3 SCSI Interface
This scanner and the host are connected through USB I/F.
2.3.3.1 Video Circuit
The video circuit of this scanner has CCD drive circuit an CCD signal process circuit.
1.
CCD drive circuit
CCD drive circuit is used to generate appropriate signal for CCD so that the CCD can
produce the exact image data.
2.
CCD signal process circuit
CCD signal processor has circuits needed for adjustment and sampling of three
channels. Each signal from CCD goes through CDS (correlated doule sampling) to
PGA (programmable gain amplifier). Each R, G, B signal, after having gone through
PGA, is selected by multiplexer, converted from analog data to digital data by 10-bit
A/D Converter (ADC), and then is output to the B101 MAIN board.
Figure 2-20. CCD Signal Process Circuit
2.3.3.2 ASF Sensor Input
Sensor Input includes home position sensor.
o
Home Position Sensor
The home position of the carrier motor is detected by photo sensor.
The intensity signal transfer of the photo sensor receiving circuit is as described
below.
Home Position is detected when the carrier passes between LED and photo transistor.
Figure 2-21. Home Position Sensor
CCD
R
B
G
CDS
CDS
CDS
PGA
MUX
Digital
Signal
OUT
ADC
PGA
PGA
CCD Signal Processor
+5V
+5V
Содержание Stylus Scan 2000
Страница 1: ...EPSON EPSON EPSON France S A Stylus SCAN 2000 SERVICE MANUAL PRODUIT ...
Страница 2: ... SEIJ99006 SERVICE MANUAL EPSONSTYLUSScan2000 All in one printer scanner and copier ...
Страница 9: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 30: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 62: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 84: ...C H A P T E R 4 DISASSEMBLY ASSEMBLY ...
Страница 118: ...C H A P T E R 5 ADJUSTMENT ...
Страница 125: ...EPSON Stylus Scan 2500 Revision A Adjustment Using the Service Adjustment Program 124 Figure 5 5 Head ID Menu ...
Страница 127: ...EPSON Stylus Scan 2500 Revision A Adjustment Using the Service Adjustment Program 126 Figure 5 6 Production Menu ...
Страница 133: ...C H A P T E R 6 MAINTENANCE ...
Страница 144: ...C H A P T E R 7 APPENDIX ...
Страница 155: ...Stylus Scan 2000 Revision A Appendix Exploded Diagrams 154 ...
Страница 156: ...Stylus Scan 2000 Revision A Appendix Exploded Diagrams 155 ...
Страница 157: ...Stylus Scan 2000 Revision A Appendix Exploded Diagrams 156 ...
Страница 158: ...Stylus Scan 2000 Revision A Appendix Exploded Diagrams 157 ...
Страница 159: ...Stylus Scan 2000 Revision A Appendix Exploded Diagrams 158 ...
Страница 201: ...188 Options et consommables Remarque La disponibilité des supports spéciaux varie selon les pays ...
Страница 228: ...28 09 99 Stylus Scan 2000 2500 1 Stylus Scan 2000 Stylus Scan 2500 EPSON France S A DSSC SFI Formation Technique ...
Страница 242: ...28 09 99 Stylus Scan 2000 2500 15 Spec Copie Locale contre Copie PC n See Stylus Scan Training Supplement A ...
Страница 243: ...28 09 99 Stylus Scan 2000 2500 16 Spec Interfaces n USB Win 98 iMac G3 n Parallèle Win 95 Win 98 ...
Страница 245: ...28 09 99 Stylus Scan 2000 2500 18 Spec Interfaces USB 2 2 n USB 1 6 MO seconde n Longueur de câble limitée à 2 mètre ...