4 Retrofitting Options208 Keysight 53210A/53220A/53230A Assembly Level Service Guide4 Slide the outside cover of the counter to the rear and remove the cover.Battery assembly installation procedure1 Using a medium slot-head screwdriver, gently push back the 4-pin connectorlock tab on the motherboard end of the jumper cable that connects betweenthe Motherboard (J1000) and the PowerSupply board (J2). Refer to Figure 4-1andFigure 4-2.Figure 4-1 Connector Locking Tab2 Gently move the cable 4-pin connector side-to-side while pulling upward onthe cable connector until the jumper cable is free from the motherboard.3 Repeat steps 1 and 2 for the other end of the jumper cable where it connectsto the AC power supply assembly (6-pin connector) on the side wall of theinstrument. See Figure 4-2. Set the jumper cable aside in a safe location incase it is needed in the future.TabJ1000