Epson Stylus COLOR 3000 Service Manual

Chapter 2
Operating Principles
2.1 Overview_____________________________________________________________________ 2-1
2.2 Printer Mechanism Operating Principles___________________________________________ 2-1
Printer Mechanism _________________________________________________________________________2-1
Printing Mechanism ________________________________________________________________________2-2
Printhead Structure _______________________________________________________________________2-2
Printing Process__________________________________________________________________________2-3
Printing Methods_________________________________________________________________________2-3
Carriage (CR) Mechanism ___________________________________________________________________2-4
Paper Feed Mechanism ______________________________________________________________________2-5
ASF (Auto Sheet Feeder)___________________________________________________________________2-6
Tractor _________________________________________________________________________________2-7
Manual Feed Mechanism __________________________________________________________________2-7
Adjusting the Loading Position______________________________________________________________2-7
Adjusting the Tear-off Position ______________________________________________________________2-8
Platen Gap (PG) Adjust Mechanism ____________________________________________________________2-8
Ink System ________________________________________________________________________________2-9
Pump _________________________________________________________________________________2-10
Capping Mechanism _______________________________________________________________________2-11
Wiping/CR Lock Mechanism ______________________________________________________________2-12
2.3 Electrical Circuit Operation Principles ___________________________________________ 2-13
C172 PSB/PSE Electrical Circuit Board________________________________________________________2-13
C203 Main Control Board___________________________________________________________________2-15
Reset Circuits___________________________________________________________________________2-17
Sensor Circuits__________________________________________________________________________2-17
CR Motor Driver Circuits _________________________________________________________________2-21
PF Motor Driver Circuit __________________________________________________________________2-22
Printhead Driver Circuit __________________________________________________________________2-23
2.4 Ink System Management _______________________________________________________ 2-27
Ink System Operations______________________________________________________________________2-27
Counters_________________________________________________________________________________2-28

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