About the DS3800DDIB1C1C
The GE Auxiliary Drive Interface Control Board DS3800DDIB1C1C features 8 trimmer resistors and 2 jumpers. The GE Auxiliary Drive Interface Control Board DS3800DDIB1C1C also is populated with 9 test points and 12 resistors. The trimmer resistors are referred as trimpot board components and are used to adjust the the circuits on the board. VCAL, VMET, IAM, TIA, IFM, and IFC are some of the identifiers associate with the trimpot components. Each has a small turning screw that you can use to fine tune the board. To do that you use a tester device to test each circuit. The installer turns the screw on the trimpot to attain the results you require.
To gain knowledge about which trimpot is associated with a particular circuit, review the information provided when you receive the carton in which the board arrives. When you open the carton, gather all the printed material and put it aside in a safe place. Store it along with the model and serial number printed on the shipping label. If you ever have need to call for customer support, having the model number and serial number will speed up the phone call and enable the support personnel to provide accurate information.
The information will also describe the trimpot components and what circuit each trimpot is connected to. In that way, you can know which trimpot component to adjust to modify the signal in a particular circuit. At the same time, you can use a tester to monitor how the adjustments change the signals in the circuit.