EPSON Stylus Scan 2000
Revision A
Operating Principles
Electrical Circuit Operating Principles
55
2.5.2.4 Timer Circuit
A lithium battery is mounted on the main board and calculates how long the printer is
not used. The timer IC starts counting with oscillation motivated by the crystal
oscillator using this battery as a power source. The following figures show connection
of the Timer circuit. The followings explain about operation of this circuit.
n
When the printer is on, power is supplied to the Timer IC by ap5V
quickly through the D1.
n
This power is also used for the power to oscillator. The oscillation wave form is
input to XI terminal.
n
Since the oscillation wave form of CR1 is analog wave form, it is processed into
the pulse form in the Timer IC.
n
When the printer is turned on, the Timer IC outputs power off time as serial data
to the gate array.
n
Once the printer is turned off, 3VDC of BAT1(lithium battery) is supplied as
power source for the Timer IC through D7.
n
Since +5V at the power on is higher than +3V of the lithium battery, the power is
not being consumed from the lithium battery.
Figure 2-29. Timer Counter Circuit
+42
+5
7
9
8
14
Batt 1
RTC-9810
(ICB)
Vin
Vdd
Vbk
GND Data
SCL
CE
/RST 2
6
5
4
25
20
21
23
E05B588
(IC2)
TMCS
TMCK
TMCS
TMDATA
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 ...