Operating Principles
Mechanism Operating Principles
2.2.8.2 Self-closing Valve
The Valve Assy is equipped with the self-closing valve to prevent ink from flowing
back.
The self-closing valve works as a sub tank to compensate for a temporary shortage of
ink supply to the off carriage type head. When solid printing is performed with a
printhead of an off carriage type, there may be a case where an excessive volume of a
specific ink is consumed temporarily and dot missing can occur.
Use of this valve ensures a uniform print quality.
When ink in the Valve Assy is supplied to the Printhead, the pressure in the Ink Storage
Chamber drops, so that the Valve Lever is tilted by the Pressure Receiving Plate. When
the Valve Lever inclines, the ink passage from the Ink Tube to the Valve Assy opens,
so that ink is supplied to the Ink Storage Chamber.
When the Ink Storage Chamber is filled with ink, the Valve Lever tilted by the Pressure
Receiving Plate is raised, so that the Valve Lever closes the ink passage from the Ink
Tube Assy.
Figure 2-28. Self-closing Valve
C H E C K
P O I N T
The capacity of each Ink Storage Chamber is equivalent to
printing of 36 pages of graphics.
Stylus Photo RX700 uses six colors, thus two chambers are left
out of use.
LM
Y
LC
Bk
C
No ink
No ink
M
Filter
Ink Storage Chamber
Valve Lever
Pressure
Receiving
Plate
To Printhead
To Printhead
Filter
Valve Lever
Содержание Stylus Photo RX700 Series
Страница 1: ...EPSON StylusPhotoRX700 Scanner Printer Copier SERVICE MANUAL ECOS SEMF05001 ...
Страница 9: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 17: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 51: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 64: ...EPSON Stylus Photo RX700 Revision A Troubleshooting Overview 64 Flowchart 3 2 Printing Processing ...
Страница 76: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Страница 133: ...C H A P T E R 5 ADJUSTMENT ...
Страница 146: ...C H A P T E R 6 MAINTENANCE ...
Страница 163: ...C H A P T E R 7 APPENDIX ...
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Страница 177: ...Model PM A900 Stylus PHOTO RX700 Board C583Main Sheet 3 3 Rev H ...
Страница 178: ...Model PM A900 Stylus PHOTO RX700 Board C583 PNL PNL B Sheet 1 1 Rev C ...
Страница 179: ...Model PM A900 Stylus PHOTO RX700 Board C583PSB Sheet 1 1 Rev H ...
Страница 180: ...Model PM A900 Stylus PHOTO RX700 Board C583PSE Sheet 1 1 Rev F ...
Страница 185: ...For 220V 240V 401 400 03 02 01 100 Rev 01 C583 ACCE 001_Overseas PM A900 EPSON STYLUS RX700 NO 1 ...