Chapter 9. Removal and Replacement ProceduresThis chapter provides removal and replacement procedures for both the Model 6C3 rack-mounted systemunit and the Model 6E3 deskside system unit.Notes:1. Servicing of the Model 6C3 is performed with the system in the rack and placed into the serviceposition. The service position for the Model 6C3 is described in “Placing the Model 6C3 into theService Position” on page 284. Servicing of the Model 6E3 can be performed with the system either inthe vertical or horizontal position.2. Before performing any of the removal or replacement procedures in this chapter, read the followingdanger and caution notices.3. If one of the listed devices fails in your system, refer to Chapter 12, “Component and Attention LEDs,”on page 389. When you have determined that the device is the source of the problem, return to theseprocedures.In the system you are about to set up or service:v The ac power interface connector is considered the main power disconnection device.v This system has redundant power supply capabilities, meaning that it has the ability to have two powersupplies running simultaneously in the same system unit. When instructed to disconnect the powersource, ensure that all power cables have been unplugged.DANGERAn electrical outlet that is not correctly wired could place hazardous voltage on metal parts ofthe system or the devices that attach to the system. It is the responsibility of the customer toensure that the outlet is correctly wired and grounded to prevent an electrical shock.Before installing or removing signal cables, ensure that the power cables for the system unitand all attached devices are unplugged.When adding or removing any additional devices to or from the system, ensure that the powercables for those devices are unplugged before the signal cables are connected. If possible,disconnect all power cables from the existing system before you add a device.Use one hand, when possible, to connect or disconnect signal cables to prevent a possibleshock from touching two surfaces with different electrical potentials.During an electrical storm, do not connect cables for display stations, printers, telephones, orstation protectors for communications lines.D05279
