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There is not much to tell about Scooba's Control Module. We can only show its location within the robot, and provide a peek under the hood. Hopefully, no one will ever have to do any work in there! Fundamentally, doing any repair work on the PWB is not feasible.
Upon lifting the robot's upper-chassis away from the lower assembly, the stark-white controller module is seen to overshadow most other elements in the lower-chassis assembly. See Figure 1. Brief inspection of the module indicates that moisture-proofing sealant has been applied all around the joint between the module-lid and base-casting, as well as having been injected into the several harness portals -- to seal around individual wires. It should go without saying: Keep out until you must enter! When that time comes, only four screws and sealant retain the Lid.
Figure 1. Control-Module -- Lid Removed
Removal of the four each TFS3.0x1.4x8LG screws will free the lid; however, two screws which mount the Blower Assembly may have to be loosened to permit one of the Blower's feet to be shifted out of the way. This particular Lid released from the lower portion as if a release-agent had been applied to the edge of the Lid! Be very careful if you do this separation, and you should find it feasible to simply re-mate the joint without needing to re-new the seal!
Those readers with intimate knowledge of a Roomba's main PWB will be able to recognize some familiar components and their arrangement on Scooba's main PWB, even though the assembly has been morphed into a very different shape. The view given in Figure 2 is from the front, looking aft.
Figure 2. Control-Module -- Lid Removed
Clearly, along the aft edge, the drive-wheel's direction-steering power-transistors (two quads of bridge-connected transistors) are arrayed just forward of the wheel-harness connectors. The large disc-shaped component, with "446" written on it, is probably the polymer fuse used in the battery-charging-controller; and made larger in Scooba to handle higher charging power. Roughly central in the picture, and listing three items from left to right, we see a screwed-down TO-220AB package which is assumed to be the 5Vdc regulator for the digital system; there is the usual clock-crystal, in the small, cylindrical can; and then the MCU (Micro Controller Unit) package at the right. At bottom-center, and still within the confines of the module wall is an empty 14-pin jack, which handles I/O for Cliff, Wall, and VWU power & signals (inner-Bumper modules). At your left, and not easily resolved is the ribbon-cable jack (26-contacts to / from the Control Panel) interface connection.
New to the board are some power-control devices, two each, located upper- right, and with a pair of connectors with black and red wires. Those devices switch power to the brush-motor, and to the blower-motor.
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This page is currently maintained by G. Plews