EPSON Stylus COLOR 480
Revision B
Operating Principles
Overview
40
2.1.6 Ink System Mechanism
Ink system mechanism consists of pump unit (include the CR lock lever) and capping
mechanism. Ink system mechanism drives the pump unit that presses cap to the
printhead and ejects ink from ink cartridge, head cavity and cap to the waste ink pad.
2.1.6.1 Pump Unit & Wiper mechanism
The pump unit is driven by PF motor. PF motor drive is always transmitted to the paper
feeding mechanism and pump unit through the following gears. Refer to the Figure
2-14.
PF Motor Pinion Gear (CW)
→
Combination Gear 8.4, 21.6 (CCW)
→
Combination Gear
9.6, 33.6 (CW)
→
Spur Gear 15 (PF Roller Gear) (CCW)
→
Spur Gear 34.2 (CW)
→
Spur
gear 15 (CCW)
→
Combination Gear 12.6, 18.4 (CW)
→
Spur Gear 15.2 (CCW)
(
Pump unit)
The Pump unit and Wiper mechanism drives according to the PF motor rotational
direction, as shown in the right table.
Table 2-4. PF motor rotational direction & Ink System Mechanism
(*1): The PF Motor rotational direction = seen from the right side of the printer.
Following figure shows the overview of the pump mechanism operation.
Figure 2-13. Pump mechanism
Figure 2-14. PF motor drive transmission path to the Pump unit
Directions
Functions
Counterclockwise (*1)
• Sets the wiper.
• Absorbs ink by the pump unit
• Set the CR lock lever
Clockwise (*1)
• Resets the wiper.
Pump unit
Cap unit
Wiper
PF Motor
Spur Gear 15.2
(Pump unit)
Combination
Gear 12.6, 18.4
Star Wheel
Spur gear 15
Spur Gear 34.2
Spur Gear 15
(PF Roller)
Paper Guide
Roller
Combination Gear 9.6, 33.6
Combination Gear 8.4, 21.6
PF Pinion Gear
CR lock lever
Summary of Contents for STYLUS COLOR 480
Page 1: ...EPSON STYLUSCOLOR480 Color Inkjet Printer SEIJ00002 SERVICE MANUAL ...
Page 9: ...C H A P T E R PRODUCTDESCRIPTION ...
Page 31: ...C H A P T E R OPERATINGPRINCIPLES ...
Page 51: ...C H A P T E R TROUBLESHOOTING ...
Page 67: ...C H A P T E R DISASSEMBLYANDASSEMBLY ...
Page 99: ...C H A P T E R ADJUSTMENT ...
Page 121: ...C H A P T E R MAINTENANCE ...
Page 128: ...C H A P T E R APPENDIX ...
Page 144: ...PSON Stylus COLOR 480 Revision B ppendix Parts List 144 ...
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