Is your Roomba 400 not charging? When you plug it in, does it light up but when you press the button you get no response? Here's the disassembly guide as well as a guide to fixing the U2/U4 Problem. This will also give you a chance to clean out all the Dust that builds up inside, you could clean out the inside of the brushdeck and preform the sealed bearings mod, and much more. In addition, once you open it up, you can see and clean all of the dust balls inside. Literally, the inside is usually PACKED with dust. ![]() That dust is harmful to the Roombas in many ways. For tips and questions, leave a comment or join www.robotreviews.com. The embedded module RooWifi: Wifi Remote for Roomba enables cleaning schedule, act precisely on each motor / actuator robot and have the real time information of the device and run it from any location where Internet access is held. No digital pin is selected by default on the board. Pin D2 is the default in the library. To use the default connect the solder jumper for D2 on the back of the board. Otherwise, you may select almost any digital pin in both software on through the jumper on the board. All Bumper and Cover retaining screws must be removed before attempting dismount of either subassembly. The two subassemblies must mechanically disengage Chassis fittings as a set; at least for the first few millimeters of movement. Steps in HoB apply to the following Discovery models, in which the Handle is mounted on the Bumper and interleaves with the Cover: Roomba-Discovery, #4210Roomba-Discovery Replacement, #4211 Roomba-Discovery SE, #4220Roomba-Scheduler, #4230 Note: We have not had hands-on experience with the Discovery SE, or Scheduler models, but those bots are considered mechanically identical to the #4210 Discovery, which is known to reward owners when the HoB process is used. Models #4210 and #4220 that were produced prior to, roughly, mid-2005, came with some removable parts that are called 'Fender Skirts' in these documents. It can be useful for an owner to recognize whether his Roomba has Fender Skirts, because their presence provides much easier access to the drive-wheels; and also explains why two very long screws are used just forward of the drive- wheels. The image below has pointers to the joint features which indicate presence of a Skirt. A Fender-Skirt is a removable panel which spans the distance between those joints. Roomba-owners who purchased either of these Discovery models after mid-2005 should inspect the left and right sides of their bot to see if 'Fender Skirts' exist on their particular unit. If no Skirt-joints are visible, no Skirts exist on that Roomba. To access the interior of a Discovery #4210, Remove the Bin assembly, then turn Roomba on it's back and remove the Brush-Guard, Main-Brushes (with end-bearings), and Battery. Manual de funciones de la asamblea general de accionistas. Place removed items clear of the work area. AAEON Technology Inc. Baumer ch 8501 oadm. Alonex Special Purpose & Industrial Electronic Equipment Repair Reference List AX-REF Preliminary Edition MD140811 Military, Scientific, Industrial Electronic & Computer Equipment Repair Catalog All the listed product's models, trade marks and brands, are the properties of their respective manufacturers and owners. Remove 4 Bumper screws. With the front wheel nearest you, look at the bumper's bottom edge and note the four screws, marked 'Bumper' in the following image (and that are all in half an inch deep holes) two just in front of the twirly brush and two the other side. To access the interior of a Discovery #4210, Remove the Bin assembly, then turn Roomba on it's back and remove the Brush-Guard, Main-Brushes (with end-bearings), and Battery. Place removed items clear of the work area. Undo (#1 Phillips bit) the four screws, and turn Roomba over momentarily so they fall onto your workbench.(hopefully covered with a towel, to stop them bouncing). Put the four screws somewhere where they won't get lost, and note that they are slightly, but noticeably thinner than the other screws you are going to remove, so don't mix them up. With an upside down Roomba with its front-wheel towards you, note the two screws that are between each tip of the black bumper and the front of each side wheel. If Disco is fitted with removable Fender-Skirts (which is why these screws must be long) these two screws need be only loosened by four turns (each will stay with its Skirt), and the Cover will no longer be connected at those two points. With Skirts, those screws are both about 13-mm long, and so are different to all the others in this set of eight. Without Skirts present, they are all the same length. Next remove the two screws each end of the battery cavity. Then the two screws deep down in front of each end of the black brush-deck (positioned between the screw you just took out and where that long screw was). While working this left-right row, take a look at mid-span to verify there is no screw in a central position. If one is found, it should also be removed. Then, look at the back end of the Roomba and each side of where the Bin fits, you will see a screw that is sunken deeper in a hole than the other two screws you will see.remove ONLY the two sunken screws.invert Roomba and shake the screws out.
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