EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850
Revision A
OPERATING PRINCIPLES
Electrical Circuit Operating Principles
54
2.4.2
C612
Main Board
The logic circuit of the
C612
Main Board is composed of the follows;
Logic line (CPU-ASIC 2 in 1, SDRAM, P-ROM and so on)
Motor control/drive circuit (CR Motor, PF Motor, Scanner Motor)
Head control/drive circuit
USB Interface control circuit
Sensor circuit
Combination circuit (RTC circuit, Reset circuit, EEPROM circuit)
The printer mechanism is controlled by the above circuits. Following explains the
major characteristics of this Main Board.
Lithium battery is not mounted
Unlike the previous printer (Stylus COLOR 680), the Lithium battery is not
mounted on the Main Board.
Adoption of 3.3V/1.5V drive logic circuit components
The 5V formed by the Combination Motor Driver (IC9) of C612 Main Board is
stepped down to 3.3V by the Regulator (IC10), and it is then used as drive voltage
for many elements. In addition, when SPC shifts to low power mode, the 3.3V that
was stepped down by the Regulator (IC10) is stepped down to 1.5V by the
Combination Motor Driver (IC9) and elements that had been driven by 3.3V are
driven by 1.5V for suppression of power consumption.
2.4.2.1 Main Elements
Table 2-9
(p.54)
shows the function of the each main elements on C571/577 Main
Board.
Table 2-8. Drive Components
5VDC
3.3 VDC
3.3/1.5VDC
• RTC (IC7)
• Flash ROM (IC5)
• SDRAM (IC6)
• CPU-ASIC (IC8)
• Motor driver (IC9)
• Common driver (IC11)
Table 2-9. Main Elements
IC
Location
Function
Flash ROM
IC5
8Mbit
• Firmware storage
SDRAM
IC6
Bus= 16 bit, 64Mbit DRAM
RTC
IC7
• EEPROM
Default settings, backup for all parameters
• Reset function
• Timer function
CPU-ASIC
IC8
CPU mounted on the MAIN board is driven by clock
frequency 48 MHz, 96MHz and controls the printer and
scanner.
Motor Driver
IC9
• CR/PF/Scanner motor drive IC
• Dropping 42V line to 5V
• Dropping 5V line to 3.3V
Regulator
IC10
Dropping 3.3 V line to 1.5 V
Common Driver
IC11
Head drive control HIC
• Generates head common voltage.
Содержание CX3810 - Stylus Color Inkjet
Страница 1: ...EPSON StylusCX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Color Inkjet Printer SEIJ05 012 SERVICE MANUAL ...
Страница 5: ...Revision Status Revision Issued Date Description A Aug 10 2005 First Release ...
Страница 8: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 35: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 61: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 92: ...C H A P T E R 4 DISASSEMBLY ASSEMBLY ...
Страница 133: ...C H A P T E R 5 ADJUSTMENT ...
Страница 148: ...C H A P T E R 6 MAINTENANCE ...
Страница 155: ...C H A P T E R 7 APPENDIX ...
Страница 168: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C612 MAIN Rev B Sheet 1 2 ...
Страница 169: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C610 PSB Rev B Sheet 1 1 ...
Страница 170: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C610 PSE Rev B Sheet 1 1 ...
Страница 171: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C612 PNL Rev A Sheet 1 1 ...