NEC DSX40 Hardware Manual - Page 33

Installation Installing Expansion Cards, the Battery, and Replacement Fuses To replace an existing battery: You should only need to replace your battery if it fails to hold a charge (i.e., no longer backs up station parameters and the Real Time Clock). 1. Do not power down the system. • If you power down the system and remove the battery, station parameters and the Real Time Clock will reset to the factory-installed default settings. 2. Following Figure 7, gently push down on the battery and remove it. 3. Replace the battery with a Sony CR2032 3-volt Lithium cell battery or equivalent. (This battery is avail- able from NEC as P/N EX0254-0040.) 4. Verify that the Real Time Clock and station parameters data is intact. 5. Discard the old battery. Caution • Take proper precautions when discarding the battery. It may be considered hazardous material in some areas. • There is a danger of explosion if the battery is incorrectly replaced. • Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions. Power Supply AC Input Fuses The power supply AC input fuses protect the system power supply from problems with the site's AC line. These problems can include improperly wired outlets and power surges. In normal operation, you should never need to replace the power supply AC input fuses. See the detail in Figure 7: Installing the Battery (page 26). To replace a fuse: 1. Be sure your system's power cord is unplugged. 2. Using a commercially-available fuse puller, carefully remove the blown fuse(s). 3. Replace the blown fuse only with the following type: Cooper/Bussman Type BK/S501 Rated 6.3A/250V Ceramic DSX-40 Hardware Manual Installation ◆ 27