EPSON Stylus PHOTO 2100/2200
Revision B
OPERATING PRINCIPLES
Electrical Circuitry Operating Principles
68
2.3.2 C387MAIN Circuit Operating Principle
The C387MAIN board consists of the logic circuits (CPU, ASIC, PROM, SDRAM,
1394 controller, USB2.0 controller), various motor control/drive circuits (CR motor,
PF motor, ASF/Pump motor), head control/drive circuit, interfaces (1284, USB, 1394,
USB2.0), sensor circuits, combination circuits (RTC, reset, EEPROM) and electrical
double-layer capacitor.
There are the following two great differences between the control circuits of this
product and conventional model.
!
Adoption of 3.3V/2.5V drive logic circuit components
The 3.3V/2.5V voltage is generated by the Regulator ICs (IC15, IC31) installed on
the C387MAIN board that r5VDC generated by the C387PSB/PSE board,
and is used to drive multiple components. This is done to save power of the logic
circuit.
The following table indicates the 3.3V/2.5V drive components and 5V drive
components.
!
Installation of hybrid circuit (IC9)
The hybrid circuit (IC9) installed consists of three different circuits, EEPROM,
RTC and reset.
By adoption of the large-capacity capacitor for timer, the Power-off timer can be
backed up for about one week after power-off.
The following is the block diagram of the C387MAIN control board.
Figure 2-19. C387MAIN Control Board Block Diagram
Table 2-16. 3.3V/2.5V and 5V Drive Components
+5V
3.3V/2.5V
• Linear encoders (CR, PF)
• Ink cartridge sensor
• Interface circuit
• Panel LED
• PE sensor
• ASF sensor
• Nozzle selection circuit (above Printhead)
• Cutter HP sensors (left, right)
• CPU
• P-ROM (SOJ)
• SDRAM
• Sensors (other than ink cartridge sensor,
PE sensor and ASF sensor)
• Interface circuit
• USB2.0 controller ASIC
• RTC, reset, EEPROM combination circuit
IEEE-1394
CN5
IC7
PROM
IC5
SDRAM
IC6
CN2
CPU
IC29
Cutter
unit
CD-R
sensor
CN18
CN4
IC8
CN13
CN1
CN15
C387 PSB/PSE board
USB 2.0
CN20
Parallel I/F
CN6
ASIC
IC30
Motor driver
IC24
Motor driver
IC25
Motor driver
IC17
CN17
CN16
CN8
CN14
CN19
CN12
IC27
Q6, Q7
Q9, Q10
CN11
CN10
C387 panel board
Head
PF encoder sensor
ASF sensor
CR encoder sensor
PE sensor
PG sensor
Release sensor
CR motor
PF motor
ASF/Pump motor
Address
Date
Hybrid IC
IC9
IC2
Summary of Contents for 2200 - Stylus Photo Color Inkjet Printer
Page 1: ...EPSONStylusPHOTO2100 2200 Color Inkjet Printer SEIJ01 016 SERVICE MANUAL ...
Page 8: ...C H A P T E R 1 PRODUCTIONDESCRIPTION ...
Page 39: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Page 69: ...C H A P T E R 3 TROUBLESHOOTING ...
Page 115: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Page 187: ...C H A P T E R 5 ADJUSTMENT ...
Page 214: ...C H A P T E R 6 MAINTENANCE ...
Page 226: ...C H A P T E R 7 APPENDIX ...
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