EPSON Stylus COLOR 3000
Rev. A
2-13
2.3 Electrical Circuit Operation Principles
This printer consists of the following circuit board:
C203 MAIN board
C178 PSB/PSE board
C203 Panel board
Head driver circuits are directly attached to the black and color printheads. Figure 2-13 shows the block
diagram of the electrical circuit.
2.3.1 C172 PSB/PSE Electrical Circuit Board
The output voltages of the PSB/PSE board are as shown in Table 2-7. Since the electrical circuit of this
printer is in a secondary circuit, the delay timer can be used to allows the printer to execute the capping
operation after the printer power is turned off. This is to prevent ink clogging or smudging caused by the
exposed condition of the printhead.
VDC
Application
+42 V
motor/
motor
Printhead common voltage
+5 V
C
MAIN control board (logic)
Sensors
Control panel, Head nozzle selection
The electrical circuit of this board uses the
(Ringing Choke Converter) switching regulator.
voltage
is first input to the filter circuit for higher harmonics absorption and is converted into
voltage thorough
the rectifier and smoothing circuits. The
voltage is then input to the switching circuit. These operations
are followed by the transformer which generates and stab42
in the secondary side. The
pr42
is then converted into the 5
by the regulator IC. The
on the
!"#
board monitors the on/off signal from the power switch on the control panel. When the power switch is
turned off, the
sends the
signal (PSC) to the electrical circuit. The electrical board has a
delay circuit (ZD86, C82 and Q84) to delay the power off. The delay period depends on the electrolytic
capacitor. It continues to 5 V and +42 V to keep the main circuit switch on the primary side active
until all electric charge is discharged. The minimum delay period is normally 30 seconds, which ,however,
varies depending on the capacitor size.
+5VDC
+42VDC
C172 PSB/PSE
C203 PNL
C203 MAIN
Printer Mechanism Unit
CR/PF/Pump
Motors
CR Unit
Color Head
Driver Circuit
Black Head
Driver Circuit
Figure 2-13. Electrical Circuit Block Diagram
Table 2-7. DC Voltage Distribution
Summary of Contents for Stylus COLOR 3000
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Page 126: ......
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Page 150: ...EPSON Stylus COLOR 3000 Rev A 6 5 1 1 1 2 3 4 4 4 4 4 4 Figure 6 1 Lubrication Points 1 ...
Page 151: ...Maintenance Rev A 6 6 9 9 9 9 9 9 9 9 6 7 Figure 6 2 Lubrication Points 2 ...
Page 161: ...EPSON Stylus COLOR 3000 Rev A A 8 ...
Page 162: ...Appendix Rev A A 9 A 2 Circuit Diagrams Figure A 2 C203 MAIN B Board Circuit Diagram 1 2 ...
Page 163: ...EPSON Stylus COLOR 3000 Rev A A 10 ...
Page 164: ...Appendix Rev A A 11 Figure A 3 C203 MAIN B Board Circuit Diagram 2 2 ...
Page 165: ...EPSON Stylus COLOR 3000 Rev A A 12 ...
Page 170: ...Appendix Rev A A 17 Figure A 8 C203 MAIN B Board Component Layout 2 ...
Page 171: ...EPSON Stylus COLOR 3000 Rev A A 18 Figure A 9 C203 PNL Board Component Layout ...
Page 172: ...Appendix Rev A A 19 Figure A 10 C172 PSB Board Component Layout ...
Page 173: ...EPSON Stylus COLOR 3000 Rev A A 20 Figure A 11 C172 PSE Board Component Layout ...
Page 174: ...Appendix Rev A A 21 A 4 Exploded Diagrams Figure A 12 Stylus 3000 Exploded Diagram 1 ...
Page 175: ...EPSON Stylus COLOR 3000 Rev A A 22 Figure A 13 Stylus 3000 Exploded Diagram 2 ...
Page 176: ...Appendix Rev A A 23 Figure A 14 Stylus Color 3000 Exploded Diagram 3 ...
Page 177: ...EPSON Stylus COLOR 3000 Rev A A 24 Figure A 15 Stylus Color 3000 Exploded Diagram 4 ...
Page 180: ...EPSON SEIKO EPSON CORPORATION ...