EPSON Stylus COLOR C70/C80
Revision A
Operating Principles
Electrical Circuit Operating Principles
55
2.2.2.1 Main elements
Table 2-6, Table 2-7 shows the function of the each main elements on C424 MAIN-B.
Table 2-6. Main Elements of the C424 MAIN-B (Stylus COLOR C70)
Table 2-7. Main Elements of the C424 MAIN-B (Stylus COLOR C80)
IC
Location
Function
CPU-ASIC 2 in 1
E01A27CA
IC7
8KB CPU mounted on the MAIN board is driven by
clock frequency 24MHz and controls the printer.
PROM
IC2
• Capacity 8Mbit(Version : THDXX), Bus = 16bit
• Program and CG for CPU (G: 2 characters)
DRAM
IC5
Bus = 16bit, 4Mbit DRAM
EEPROM
IC18
2kbit EEPROM
• Default value setting
• Parameter backup
• For displaying raster data
Reset IC
IC1
Reset IC
• For +3.3V; reset when +2.5V is detected
• For +5V ; reset when +4.2V is detected
• For +42V ; reset when +36.7V is detected
Common
Pre-Driver
IC13
Head drive control HIC
• Generates head common voltage.
Motor Driver
IC8
CR/PF motor drive IC
Parallel I/F IC
IC4
IEEE1284 parallel I/F transceiver IC.
IC
Location
Function
CPU-ASIC 2 in 1
E01A27CA
IC7
8KB CPU mounted on the MAIN board is driven by
clock frequency 24MHz and controls the printer.
PROM
IC2
• Capacity 8Mbit(Version : THEXX), Bus = 16bit
• Program and CG for CPU (CG: 38 charactors)
DRAM
IC3
Bus = 16bit, 16Mbit DRAM
HIC
IC6
[RTC]
Electric double layer condenser
[Reset]
• For +3.3V; reset when +2.5V is detected
• For +5V ; reset when +4.2V is detected
• For Power; reset when +36.0V is detected
[EEPROM]
2kbit EEPROM
• Default value setting
• Parameter backup
Common
Pre-Driver
IC13
Head drive control HIC
• Generates head common voltage.
Motor Driver
IC8
CR/PF motor drive IC
Parallel I/F IC
IC4
IEEE1284 parallel I/F transceiver IC
Содержание Stylus Color C70
Страница 1: ...EPSONStylusColorC70 C80 Color Inkjet Printer SEIJ01 004 SERVICE MANUAL ...
Страница 5: ...Revision Status Revision Issued Date Description A July 31 2001 First Release ...
Страница 9: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 35: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 60: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 96: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Страница 137: ...C H A P T E R 5 ADJUSTMENT ...
Страница 169: ...C H A P T E R 6 MAINTENANCE ...
Страница 182: ...C H A P T E R 7 APPENDIX ...
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