Epson Stylus COLOR 3000 Service Manual

EPSON Stylus COLOR 3000
EPSON Stylus Color 3000 Service Manual
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2.3 Electrical Circuit Operation Principles
This printer consists of the following circuit boards:
 C203 main board
 C178 PSB/PSE board
 C203 control panel board
Printhead driver circuits are directly attached to the black and color printheads. Figure 2-13 shows the block
diagram of the electrical circuit.
C172 PSB/PSE Electrical Circuit Board
The output voltages of the PSB/PSE board are shown in Table 2-7. Since this printer has a secondary circuit,
the delay timer allows the printer to run the capping operation after printer power is turned off.
VDC Application
+42 V
 CR motor/PF motor
 Printhead common voltage
+5 V
 C203 Main control board (logic)
 Sensors
 Control panel, Printhead nozzle selection
The electrical circuit of this board uses an RCC (Ringing Choke Converter) switching regulator. AC voltage is
input to the filter circuit for higher harmonics absorption and is then converted into DC voltage through the
rectifier and smoothing circuits. The DC voltage is input to the switching circuit. After these operations occur,
the transformer generates and stabilizes +42 VDC in the secondary circuit. The +42 VDC is then converted
into a stable +5 VDC by the regulator IC. The CPU on the C203 main board monitors on/off signals from the
power switch on the control panel. When the power switch is turned off, the CPU sends a POWER OFF
signal (PSC) to the electrical circuit. The electrical board has a delay circuit (ZD88, C84, and Q84) to delay
power off. The electrolytic capacitor determines the delay period. It continues to output +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 depends on the capacitor size, but is normally 30 seconds.
+5 VDC
+42 VDC
C172 PSB/PSE
C203 PNL
C203 Main
Printer Mechanism Unit
CR/PF/Pump
Motors
CR Unit
Color
Printhead
Driver Circuit
Black
Printhead
Driver Circuit
Figure 2-13. Electrical Circuit Block Diagram
Table 2-7. DC Voltage Distribution

Epson Stylus COLOR 3000 Specifications

Printing Resolution

maximum resolution	1440 x 720 dpi
driver setting resolution	720 x 720 dpi
printable width	410 mm

Paper Handling

paper capacity (plain paper)	100 sheets
paper capacity (EPSON Inkjet transparencies)	30 sheets
paper capacity (envelopes)	10 envelopes

Ink Cartridges

black ink cartridge print capacity	Up to 3, 000 pages (A4, text @ 360dpi)
colour ink cartridges print capacity	Up to 2, 100 pages (A4, 360dpi 5% duty each colour)
colour ink cartridges	Cyan, Magenta, Yellow

Operating Environment

operating temperature	10-35°C
operating humidity	20-80% RH
total print volume	75, 000 pages (A3, text only)

Electrical Specifications

rated voltage	AC 220V-240V
rated frequency	50-60 Hz
power consumption	Approx. 21W (ISO 10561 letter pattern)

Weight and Dimensions

weight	18 Kg
width	810 mm
depth	565 mm
height	240 mm