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Board&Software Replacement Before Turning ON Power-All Procedures <br /> Remove the grounding wrist strap from <br /> its package and wrap one end around <br /> ® your wrist. Ahere the other end to the <br /> 2side of the comm board cage. <br /> Pivot edge of tool <br /> against inner partition <br /> of console. <br /> �rew�cpueaoN..a. CPU Board <br /> Place curved end of the removal <br /> tool under front end of CPU board at <br /> each retention pin location(3 places) <br /> and rotate tool to pry the board <br /> off of the retention pin. Replace <br /> 0 o removal tool in its storage position. <br /> CPU Board Installation guide a a 10 <br /> slots(one at top and bottom) o 0 <br /> I « o <br /> 3 Ret ieve Board Removal I <br /> tool from its storage Pull the board straight out until you disconnect <br /> position on the top of the it tram the motherboard connector and it <br /> comm cage by pulling on !71 clears the top and bottom guldes. Rotate It <br /> black knob in center of �-lJ towards you to clear the door. Hold the CPU <br /> tool. hoard by its edges and avoid touching <br /> components and connector pins. <br /> 5 m <br /> Disconnect each of the two cables a o <br /> attached to the CPU board,and the <br /> printer cable from the Local Printer ° + <br /> Cam Board. <br /> Remove ac power to the <br /> console. Push down to <br /> _ turn battery backup OFF. ° <br /> BATr OPEN <br /> Figure 2. Removing CPU Board <br /> 5. Place old and new CPU boards side by side on a clean work surface.Make sure the Battery Backup switches P on <br /> both boards are in the Off position.Remove the SEM(see Figure 17 on page 29) and the PROM chi see e <br /> 17)from the old CPU board and plug them into the identical sockets on the new CPU board. <br /> 5 <br />