Epson WF-4640 Series User Manual

Confidential
Disassembly/Reassembly Disassembly/Reassembly Procedures 28
Epson WF-5690/4640/4630/5620/5190/5110 series Revision D
 When separating the Printhead and the Ink Supply Unit, make sure to perform "3.2.7
Ink Leak Check (p79)" to check if ink is leaking.
 After disconnecting the Printhead and the Ink Supply Unit, ink may spill over even if the
pressure is released. Therefore, be careful not to contaminate the surroundings.
 Make sure that the buffer is being deflated before the print head is removed, as shown
below.
If the buffer is inflated, make sure to perform the “Ink pressure release” again, because
the ink is not discharged condition.
Figure 2-2. The buffer condition before and after performing the ink pressure release
Buffer
Top view
Buffer
Top view
Buffer
Before the ink pressure release
(The Buffer is inflated condition)
After the ink pressure release
(The Buffer is deflated condition)
Ink Supply Unit
Print head

Epson WF-4640 Series Specifications

General

Max Print Resolution	4800 x 1200 dpi
Automatic Duplex Printing	Yes
Scanner Type	Color flatbed / ADF
Max Scan Resolution	1200 x 2400 dpi
Connectivity	USB, Ethernet, Wi-Fi, Wi-Fi Direct, NFC
Functions	Print, Copy, Scan, Fax
Mobile Printing	Epson Connect, Apple AirPrint, Google Cloud Print
Ink Type	DURABrite Ultra pigment ink
OS Compatibility	Windows, Mac
Print Technology	Inkjet
Print Speed (ISO)	20 ppm (black), 20 ppm (color)
Paper Capacity	80 sheets rear feed
Display	color touchscreen
Weight	31.3 lbs