 Hey guys, Kevin. Today, we're going to talk about those scanners of Jack Pro 8000 series and 9000 series. They have this problem. You have a document feeder jam, and they all said the original is jammed, and you can see a little video, and after showing the video, and there's no way you can figure out what's happening. Of course, if you follow the instruction, and you found a piece of paper jam in there, and this video is not for you, so you can just take that piece of paper out, and you're done. This video is for those who carefully examine everything, but still cannot figure out why. This white piece has nothing to do with it. For the printer to think there's a paper jam, you have to have some electronical sensors. This part looks like it has a sensor lever, but if you take an ADF and open it up, you'll find that the sensor is on this part, and this white thing it just controls. One paper has to be completely removed before the next paper can fit into the ADF. So we'll take a closer look of this part. So when you scan, the paper can look over, and press this lever down. And when that lever is down, it's going to make a piece of plastic moving away from optical sensor. This is what the optical sensor look like. It basically detects if you have a piece of thing to block the light between the two column or not. So if you have a piece of paper jammed here, there's no way you can see it from the top, and if you remove it, if I find some dirt or something jammed it, that problem is the problem. Otherwise, check the cable connection, the FFC cable, make sure the cable is inserted securely. Unfortunately, this lever cannot be easily accessed by just opening up the cover. You'll need to remove some screws. You'll need a T10 drill bit. If you don't have it, you can go to bchtechnologies.com and just type in T10 and it will show you the bit. Of course, your local Ace hardware store should have this too. You will need to remove a total of eight screws from the top and four on each side. Anyway, if you see any screws facing up, remove it. There should be eight of them. Now open the scanner and remove two more screws and take off this metal piece and then get a flathead screwdriver to push this tab in and another one on the bottom, push it in and this paper stacker can be taken out. For the spare parts, I'm going to put a link above so you can just click if you need an extra stacker. Now we remove this long piece from the bottom. This long piece on the top is harder to remove. If you already see some debris gump up on the trigger, you can just clean it without removing that long piece. Otherwise, this is how you remove it and let me give you a slow motion. See the little box underneath my thumb. So basically you have to bend towards, I don't know, towards you and remove it. When you put it back, it's hard to and you need to put a box in and first and then move it away from you and I will install it. If you don't see anything mechanical wrong, for example a piece of gum or the lever doesn't miss a spring or something and it probably is something wrong with the sensor. So just take the sensor out and get the multimeter and start troubleshooting. If you just want to have a new ADF without doing any more troubleshooting, you can go to bchtechnologies.com and go to printer parts and under HP and there's a scanner and ADF feeder. You can say this is today what we're talking about. With all the unit, you just use your finger dig it in and open up this white plate and check to make sure that the lever is working. So the problem wasn't caused by the lever. Now we're ready to disconnect the FF cable from this old unit. So see there's a little tab there, just bend it, pull on the black wire and the whole sensor gonna come out. Now you can disconnect the FFC cable and take out the old unit. If you bought a unit from bchtechnologies, you're gonna have that FFC cable. So first thing you do is remove that FFC cable and reconnect with the cable from the printer. So now if I put something in between and block the light, the printer will think that there's no jam. So before I put everything back, I want to test this. So I put a piece of plastic in between and just use some tape to secure it. Now the printer should think there's no paper jam. Power on the printer and there are no more errors. So this will fix the problem. And when you install it back, make sure the lever goes between the sensors and test the lever before you close the white part, the white cover. The rest are easy, just put it back. And I'm going to slow down this part, which you'll put the long piece on the top back. Remember, put the box in first, then bend it towards, bend it away from you and that will work. And then put a stacker back and remember you have 10 screws, 8 on top and 2 more on the bottom with that metal piece. Okay, I hope this video helped you fix the problem. Visit us at www.bchtechnologies.com or locally at Greensboro, North Carolina. Cheers!