The GE Regulator Board DS3800HAFA1B1D features a modular connector for attachment to a drive and retention levers to hold the board in the drive. The GE Regulator Board DS3800HAFA1B1D also is populated with 11 jumpers, and 4 trimmer resistor components. The board also has 1 20-pin connector and 1 34-pin connector.
Under some conditions, the resistors that populate the board must be adjusted to make the board more compatible for the drive configuration. That is, compatible with the combination of boards and other devices installed in the drive. If that is the case, the trimmer resistors on the board are useful because they enable a technician to adjust the resistance. The technician should consult with the site operators and engineers to determine the processing needs of the site. Then, use a testing device to gauge the signal of the circuit that you want to adjust. Use a screwdriver to adjust the trimmer resistor. When the signal is adjusted, an optional step is to drop a liquid on the screw that hardens and prevents the screw from accidentally turning. Use a liquid that will not harm the trimmer resistor and can be peeled off if more adjustment is needed. This might happen if the board is removed from 1 drive and installed in another drive.
The trimmer resistors are also known as trimpots because they serve as potentiometers. When the board arrives from the factory, the trimpots are adjusted for a standard resistance that serves the purposes of most drives. The adjustment is made at the factory during product testing.