 Hey guys, this is Kevin. Today we're going to talk about how the HP Printed self-cleaning works. Printed cleaning is pretty important for the printer. If there are malfunctions, I hope you will have the ability to troubleshoot it. And so this is just basic what each part is and how it works. If you need a set of play width, you can go to bchtechnologies.com and go to printer parts, scroll down HP, and whisk ink. We don't have used ones. We don't have new ones. First, let's talk about this thing go back and forth and up and down. This ladder is attached to a gear. So when the gear turns, this platform can go back and forth. When you go back and forth, it cleans the printhead with this rubber blade. So if you have a dried ink on the bottom of the printhead, this thing can remove the dried inks. And the second function is this part can re-stop and attach the bottom of the printhead. And so you can use a vacuum to suck ink out of the bottom. You might wonder, you get two vacuum chambers, but why you have four tubes? Let me draw a diagram to show you how it works. So here's the part that we just talked about. Oh, for God's sake, if you need this diagram, you can text HPWasteOneWord to this number. And I will text you back a link that you can download this picture. You have four holes and two in the middle, that's lower. So that's where the waste ink gets sucked out. On the left side is the color ink, the CMY. And on the right hand is the black ink. So for black ink, I used black as color. I got colored black, so it's easier for you to see. After the ink gets sucked out, it goes to this peristaltic pump. Peristaltic pump is widely used in the printing industry. If you look inside, there's not much there. And there's only a tube and there's a roller. So basically what you do is you turn the motor on and the roller is going to rotate and massage this tube. And when this tube gets massaged, the ink gets squeezed out. The advantage is the mechanical part never touched the ink. The ink always flow in a tube. This is different from centrifuge pump and different from diaphragm pump. And below the peristaltic pump is the motor part. This disk has a little tiny marks on them. So when it rotates, it goes through this optical sensor that can measure the rotation speed of the pump. So you've got two tubes coming in, two tubes coming out. And HP was a white tube for the color with ink. And they used the black tube for the black ink. And the ink gets dumped out to this little box. And the white tube, which is the coloring, gets dumped into the front section. And the black ink is downloaded to the lower section of the box. OK, now you understand the bottom part, the top part, and the side part. And why the side box gets two sections. But what is this thingy? They're actually air tubes. It controls whether the HP want to suck ink from the left or right of the chamber. For example, if HP want to suck ink from the left side, it's going to open the air hole on the right side. So the right side doesn't have any sections. And the two air tubes are connected to this selection lever. The selection lever is pushed by the printhead assembly. And each time, only one tube is open. So you'll always clean like one side of your printhead. I hope you enjoyed this video. Let me know if only you know how the Epson with ink assembly works. Epson designed a much more complex assembly. However, because of the complexity, I think the faulty rate is higher than HP.