EPSON Stylus PHOTO 2000P
Revision A
OPERATING PRINCIPLES
Electrical Circuit Operating Principles
47
Table 2-20 shows the major ICs on the C304MAIN Board and their
functions.
NOTE:
C298MAIN Board is IC25, which is composed of IC20 and IC8.
Table 2-20. Major Element on C304MAIN
IC
Location
Functions
CPU (C90A11CA)
IC20
A 128-pin SQFP package. Operates at
24.0MHz. Power supply voltage is 3.3V.
• Sets the current value for the ASF/Pump
motor.
• Measures the printhead temperature.
• Several interrupting functions
• Outputs the system clock signal.
ASIC (E05B70**)
IC8
A 240-pin QFP package. Operates at 48.0MHz/
24.0MHz/28.0MHz. Power supply voltage is
3.3V.
• Controls interfaces.
• Controls specified motors.
• Controls the printhead drive waveform
circuit.
• Transfers serial data to the printhead.
• Controls the ASF/Pump motor
• Receives panel control signals and sensor
signals
• EEPROM
• Controls detection of the signals output
from the encoder.
Slave CPU
(C90A26CA)
IC15
A 128-pin SQFP package. Operates at
24.0MHz. Power supply voltage is 3.3V.
• Controls the DC motors. (Setting and
controlling the current value for the PF
motor and CR motor)
PROM
IC2
8/16Mbit
• Stores the firmware or fiCG
DRAM
IC3
A 16Mbit DRAM. Power supply voltage is
3.3V.
• Serves as specified buffers and work area
EEPROM
AT93C56
IC6
2kbit
• Stores default setting values and specified
parameters.
Reset IC
RTC9810SA
IC5
• Resets the +5V/+24 VDC line circuits.
• Serves as the timer powered by a lithium
battery.
Table 2-20. Major Element on C304MAIN
IC
Location
Functions
Содержание 2000P - Stylus Photo Color Inkjet Printer
Страница 5: ...5 Revision Status Revision Issued Date Description A May 11 2000 First Release ...
Страница 9: ...C H A P T E R 1 PRODUCTDESCRIPTIONS ...
Страница 31: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 55: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 75: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Страница 118: ...C H A P T E R 5 ADJUSTMENT ...
Страница 138: ...C H A P T E R 6 MAINTENANCE ...
Страница 148: ...C H A P T E R 7 APPENDIX ...
Страница 166: ...04 03 01 02 for S E ASIA 03 03 06 05 MC 2000 EPSON STYLUS PHOTO 2000P No 6 Rev 01 10206 ...
Страница 167: ...805 804 804 800 802 803 801 806 806 08 MC 2000 EPSON STYLUS PHOTO 2000P No 7 Rev 01 10206 ...
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