 Hey guys, Kevin here. Today we're going to talk about how to take this kind of printer part. Then I'm going to walk you through the different parts inside the printer. If you want to remove this part, it is secured by the tab on both sides. Just lift it up and use your finger to pull the part. And it can be removed easily. To put it back, just line it up and push vertically, push it down. For the front unit, you have to sort of bend the middle and then it will come off. To put it back in, insert one of the tab. Then you can sort of slide another tab and it will be lined up and you can close it. Okay, let's take the printer part. You will need a number two Phillips screwdriver and try to get a really long one. In the back of the printer, remove this screw and then remove the cover for the fax unit. Then remove this screw on the top of the scanner. I'll take out the duplex roller and the waste tanks and remove the paper trays. There's a tab on the right side of the scanner, so push your thumb there and pull it towards your right. Close the cover and then you can lift the whole thing up. I have a whole video about how to remove and install the scanner, so I'll put a link above. Now we're going to take the cover off. First, we remove the hinge and remove the screw underneath the hinge. That's why you'll need a long screwdriver. The second screw is in this hole. The fourth one is here. The fifth one is on the top. The sixth one is the one that below it. Finally, the seventh one is in that hole. How many we removed so far? Now we can get the whole cover removed. Let's work through some major things. You got the power supply, fax module, and the main board or motherboard. Print head carriage and front panel. If we think of the printer as a two-dimensional machine, we get the print head move in the axis. We call this a carriage assembly or CR assembly. Then we have a paper moving in the y direction. We call it a PF assembly or paper feed assembly. Let's cover the CR carriage assembly first. If your printer is locked, you can pull the carriage to your right a little bit. Then rotate this rod counterclockwise. You'll see the lock is released on the right side. The movement is controlled by this belt. So this belt, then there's a pulley. And the motor is here. So the motor drives this pulley to move the print head back and forth. This is an encoder belt that tells the printer how far it moved. Let me take it off and just show you. If you see here, it has a really fine mesh. The encoder scale is read by this CR sensor. It basically tells the printer where the print head is at. So what about those cables? This printer has two columns. Normally, Epson uses one cable to control each column. So you get two wide cables. By the way, all those parts, you can go to bchtechnologies.com and then go to printer parts and Epson. There are categories, for example, printer carriage and flex cables. Those nine by two cables, if you count the pins, there are nine pins. Then there's a gap. Then there's another set of nine pins. Then there's eight by two cables. So this cable has eight pins, a gap, then eight pins. At the end, it's split into two eight by one cables. One of the eight by one goes to the CR encoder reader, the sensor. Another set of eight pins goes to this CR contact module. Another side of contact module is contact with this CSIC terminal. And the CSIC terminal, which we call the nine pin G board pin. That's going to contact with cartridge. And that one reads the cartridge ink level. On the bottom of the carriage, if you pay attention to that little green thing, that's the paper width sensor. Paper width sensor is pretty small. It's also a photo sensor, like a PS. It detects how wide the paper is. Okay, that concludes the CR site. Take a snapshot so you can know which part is which. Okay, paper feed or PF. And here's the rear end paper guide. Those wide thing is called a stopper. So the paper come up, get a stopper. Then they come with a roller and they get feeding here. Back of this is the stopper. And this is the paper pickup R. So I lower it down and then touch the paper. And I feed the paper upwards. So when the paper get a fight to the upper level, this is the paper eject sensor lever. Underneath, there's a sensor. Here's how PE sensor works. The PE sensor is on the bottom and the lever is on the top. So if you have a piece of paper, that will push the lever away from the sensor. The PE sensor lever is installed on this wide part. It is called paper guide upper assembly. In the back is suspended by 5 springs. In the front, those rollers go to push the paper down so make sure the paper is flat. On the left side, we have a PF motor. That drives this timing belt. Here's another pulley and that spring. In the front, there's another roller. This is a PE roller, paper eject roller. And this roller is called a PF roller, paper feed roller. The PF roller is connected to another encoder. But this time is disk. You can see the vertical lines and which is read by the PF encoder sensor. Here's the star wheel assembly. Some people call the pizza wheel assembly. And inside the assembly, here's the photo ink sensor or PIS sensor. Okay, still here? Why not just subscribe to my channel and come back and watch the rest? Anyway, if you have a double-decker, let me show you how to take the top off. So the first screw is right here. And the second screw is here. And the third one is down there. The fourth one, you have a loop down the PF motor. And the fifth one is underneath. So you have to take this apart. You take this board out first and disconnect the tube. There's one screw here. You have to pull, pull it, and you will be able to see it. And then there's another screw around this corner. Now this unit can be removed. We will remove the unit. Remember, take this lever off. And I'm going to post another video to show you how to put it down. This is very easy to get lost. I'm going to have a magnet nearby to catch that spring if I ever get lost. All those trouble is for that screw right here. That's the fifth. The seventh screw is in that hole. So underneath you have another motor, that's the pickup motor. That drives this pickup arm. And also this pickup motor also has a pickup encoder. And just like the PF encoder, this pickup encoder is in a disc. And also on the bottom, there's a tree sensor that if you push the paper tree in, that's going to push this lever. So the printer will know you inserted a paper tree. Okay, that concludes the paper feed, PF. Okay, let's go over the sensors. So for the photo type of sensor, we have a paper width sensor. And then we have a PIS sensor on the star wheel. And then we have a PIS sensor, a paper eject sensor. So for the encoder type of sensors, we have a CR sensor that's in a belt or strip, whatever you call it. And then we have two encoder discs. One is the PF paper feed that's on the left side. Underneath, we have a paper pickup disc. For the lever type sensors, one is on the top of the printer, and you put it down and the printer know you closed the printer lid. And then there's a tree sensor on the bottom, which detects if you insert a paper tree or not. Two photo sensors, one PIS sensor, three encoders, and two lever type sensors. Motors, there are three motors, carriage motor, CR motor. The PF motor, paper feed motor, and pickup motor underneath. If you need those drawings, you can go to bchtechnologies.com, go to printer parts, and just click on the category, for example, PF. That should have this nice picture about all the PF parts. I hope you enjoyed this video. Visit us at www.bchtechnologies.com or locally at Greensboro, North Carolina. Cheers!