User manual ACER ALTOS 900

[. . . ] blackened pin on a jumper represents pin 1. Figure 1-2 Jumper Locations Jumpers are prefixed "JP". The blackened pin of a jumper represents pin 1. 1-4 User's Guide 1. 3. 2 Table 1-1 Jumper Settings Jumper Settings Setting 1-2 2-3* 1-2* 2-3 1-2* 2-3 1-2 2-3* 1-2* 2-3 1-2* 2-3 1-2 2-3* 1-2* 2-3 4-5 1-2* 2-3 VR VRE 256 KB 512 KB Acer Generic Enabled Bypass Buzzer Speaker Enabled Disabled P55C CPU P54C CPU PCI device ID is 11 Hex PCI device ID is 0C Hex Disabled Enabled Disabled Function Jumper CPU Voltage JP1 Cache Size JP3 BIOS Version JP8 Password Security JP9 PC Sound Source JP10 Front Panel Reset JP11 CPU Type JP17, JP18, JP19 SCSI Selection JP20 Onboard VGA JP23 * Default setting System Board 1-5 Table 1-1 Jumper Jumper Settings (continued) Setting 1-2* 2-3 JP4 JP5 JP7 Function High-byte terminator ON High-byte terminator OFF Bus Freq. Ratio SCSI Termination JP24 Core/Bus Freq. JP4, JP5, JP7 2-3 1-2 2-3 2-3 1-2 1-2 2-3 2-3 2-3 1-2 1-2 2-3 2-3 1-2 1-2 2-3 1-2 2-3 2-3 2-3 3-4 3-4 3-4 3-4 50 MHz 60 MHz 60 MHz 60 MHz 66 MHz 66 MHz 66 MHz 66 MHz 75 MHz 150 MHz 120 MHz 90 MHz 200 MHz 166 MHz 133 MHz 100 MHz 3/2 5/2 2/1 3/2 3/1 5/2 2/1 3/2 1-6 User's Guide 1. 3. 3 Connector Functions Table 1-2 lists the different connectors on the system board and their respective functions. Table 1-2 Connector Functions Function COM1 COM2 Power connector for 200-watt SPS Power connector for 300-watt SPS Parallel port connector Diskette drive connector IDE drives connector Remote diagnostic module (RDM) connector Remote diagnostic module (RDM) connector Faulty-drive LED connector Fast SCSI-II (narrow SCSI) connector Wide SCSI connector VGA daughter board connector Power LED and keylock connector Hard disk LED connector Speaker connector Reset/Turbo connector Connector CN1 CN2 CN3 CN4 CN5 CN6 CN7 CN8 CN9 CN10 CN11 CN12 CN13 CN15 CN16 CN17 CN18 System Board 1-7 1. 4 ESD Precautions discharge) Always observe the following ESD (electrostatic precautions before installing any system component: 1. [. . . ] Gently push the SIMM to a vertical position until the pegs of the socket slip into the holes on the SIMM, and the holding clips lock the SIMM into position. The SIMM should be at a 90° angle when installed. 1 2 Peg Pin 1 Indicator (curved edge) Hole Figure 1-7 Installing a SIMM 1-14 User's Guide 1. 7. 4 Removing a SIMM Follow these steps to remove a SIMM: 1. Press the holding clips on both sides of the SIMM outward to release it. Pull the SIMM out of the socket. Holding Clip 1 3 2 Figure 1-8 Removing a SIMM System Board 1-15 1. 7. 5 Reconfiguring the System Reconfigure the system after installing or removing SIMMs. Follow these steps to reconfigure the system: 1. A memory error message appears, indicating that the total memory does not match the value stored in CMOS. Press + + during the power-on self-test (POST) routine to run Setup. During POST, a message indicating a wrong memory configuration appears. Press twice to exit Setup and reboot the system. system boots with the new memory configuration. The 2. 3. If you operate the system with WindowsNT, NetWare, or UnixWare, make sure to run ECU every time you install or remove an EISA or a non-PnP ISA card. See Chapter 3 for information on ECU. 1-16 User's Guide 1. 8 Second-level Cache Upgrade The system supports synchronous pipeline burst second-level cache. The system board has an exclusive 160-pin socket for the synchronous pipeline burst cache module. The cache module socket supports either a 256 KB or 512 KB 3. 3V cache module. Follow these steps to install a cache module: 1. Position the cache module on top of the socket such that its component side faces the CPU. Insert the cache module carefully until the golden finger of the module fit into place. Figure 1-9 Installing a Synchronous Cache Module System Board 1-17 1. 9 Video Memory Upgrade Larger video memory allows you to display higher resolutions and more colors. The system board comes with a 512-KB video memory onboard upgradable to 1 MB. Follow these steps to upgrade the video memory: 1. Locate the video DRAM upgrade socket labeled U44 on the system board. [. . . ] You must know the correct configuration values for your system before you enter Setup, which is why you should write them down when the system is correctly configured. An incorrect configuration is a major cause of power-on error messages, especially for a new system. Remove the system cover, following the directions in the housing installation manual. Check that the jumpers on the system board and any expansion boards are set correctly. [. . . ]