260 Power Management Unit Card and Board Replacement TB8100 Service Manual© Tait Electronics Limited September 200615.1.2 Equipment SafetyImportant This equipment contains devices which are susceptible todamage from static charges. Refer to “ESD Precautions”on page 17 for more information on antistatic procedureswhen handling these devices.Important Insulated gate FET transistors are susceptible to damagefrom static charges, due to their extremely high input resist-ance. To avoid possible damage to the device during han-dling, testing or actual operation, we recommend you fol-low these procedures: avoid unnecessary handling; whenhandling the device, pick it up by the cap, not the leads; donot insert or remove the device while the power is on;avoid contact with non-conductive plastic or non-conduc-tive styrofoam.15.2 Colour Coding of Circuit Boards and CardsThe DC converter board and standby power supply card are colour-codedaccording to their nominal input voltage. The auxiliary power supply boardis also colour-coded according to its nominal output voltage. The coloursused are as follows:■ 12VDC – green■ 24VDC – yellow■ 48VDC – red.
