1-3 (E)BCU-100 IM1-4. Installing the Optionsw. Unplug the power supply cord before starting installationwork.If installation work is started with the power supplyturned on, it may cause electrical shock or damage toprinted circuit boards.. The BE-28 board and the power supply unit become hotwhile using the BCU-100.Touching the BE-28 board and the power supply unit inthis state may cause burn.Turn off the power and wait for 30 minutes until theinside cools down before installing an option.1-4-1. Installing the BKCU-EX1 and BKCU-MY8DThis section describes the method to install the memoryextension adapter BKCU-EX1 and memory module (8 GB)BKCU-MY8D to the BCU-100.BKCU-EX1 components. MEM-122 board (1). Screw PSW3 x 6 (2)BKCU-MY8D components. 4GB DDR2 SDRAM DIMM (2)Note when installing BKCU-MY8DWhen installing the memory modules, touch a metalportion of the BCU-100 to eliminate the ElectrostaticDischarge (ESD) in your body before starting the installa-tion work to prevent damage to the memory modules.3. Turn off the main power of BCU-100 and disconnectthe AC power cord from the outlet.4. Remove the two screws and remove the top plate tothe arrow.Lever LeverDIMMsDIMM slotsMEM-122 boardLeversTop plateB3 x 6B3 x 6Installation procedure1. Open the levers on the DIMM slot on the MEM-122board.2. Insert the two DIMMs of BKCU-MY8D to the DIMMslots on the MEM-122 board until the levers on bothsides are locked.