&KDSWHU System Board The V55LA-2 is a high-performance system board with a 64-bit architecture. It supports the Intel P54C and P55C CPUs running at 75/90/100/120/133/150/166/200 MHz. It also supports Cyrix M1/M2 and AMD K5/K6 CPUs. The system board utilizes the Peripheral Component Interconnect (PCI) local bus architecture that maximizes the system performance by enabling high-speed peripherals to match the speed of the microprocessor with its 120 MB or 132 MB per second transfer rate in burst mode.
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1.1.1 System Board Figure 1-1 shows the locations of the system board major components.
1.1.2 Slot Boards The system board comes with a slot board already installed. The slot board carries the PCI and ISA bus slots for system enhancements and future expansion. The slot board may vary in size and layout depending on your system housing. Figures 1-2 and 1-3 show the two kinds of slot boards.
1.2 Jumpers and Connectors 1.2.1 Jumper and Connector Locations Figure 1-4 shows the jumper and connector locations on the system board. Figure 1-4 System Board Jumper and Connector Locations The blackened pin of a jumper represents pin 1.
1.2.2 Jumper Settings Table 1-1 lists the system board jumpers with their corresponding settings and functions.
Tables 1-2 to 1-4 show the settings of DIP switch 2 (SW2), JP7, JP43, and JP44 for CPU selection. Table 1-2 CPU Freq. (MHz) SW2, JP7, JP43, and JP44 Settings Host Bus Freq.
Table 1-2 CPU Freq. (MHz) SW2, JP7, JP43, and JP44 Settings (continued) Host Bus Freq.
1.2.3 Connector Functions Table 1-5 lists the different connectors on the system board and their respective functions.
Table 1-5 Connector Functions (continued) Connector Function CN31 Internal line-in connector JP48 Hard disk and message LED (pins 1-3-5) Power LED (pins 2-4-6) JP50 Power-on switch connector JP15 Standby power connector JP30 External battery connector See section 1.10.1 for details on power and LED cables to the connector JP48. 1.3 ESD Precautions Always observe the following electrostatic discharge precautions before installing a system component: (ESD) 1.
1.4 Memory Upgrade The system board comes with four 72-pin SIMM sockets that support 4-MB and 16-MB single-density SIMMs and 8-MB and 32-MB doubledensity SIMMs. Table 1-6 lists the possible 64-bit memory configurations.
The system also supports 32-bit memory configurations. This feature allows you to install only one SIMM in one configuration. Table 1-7 shows the 32-bit configurations.
1.4.1 Installing a SIMM Follow these steps to install a SIMM: 1. Carefully slip a SIMM at a 45° angle into a socket making sure that the curved edge indicating the pin 1 of the SIMM matches pin 1 of the socket. A SIMM fits only in one direction. If you slip in a SIMM but would not completely fit, you may have inserted it the wrong way. Reverse the orientation of the SIMM. 2.
1.4.2 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. 2. Move the SIMM to a 45° angle. 3. Pull the SIMM out of the socket. Holding Clip 1 3 2 Figure 1-6 Removing a SIMM Always remove SIMMs from the socket labeled SIMM-4, then SIMM-3, and so on.
1.4.3 Reconfiguring the System You must enter Setup after installing or removing SIMMs to reconfigure the system. Follow these steps to reconfigure the system: 1. Turn the system on. A memory error message appears, indicating that the total memory does not match the value stored in CMOS. 2. + + to enter Setup. A warning message Press appears indicating an incorrect memory configuration. 3. Press twice to exit and reboot the system. The system boots with the new memory configuration. 1.
1.6 CPU Installation The system board comes with a zero-insertion force (ZIF) CPU socket for easy installation. Follow these steps to install a Pentium CPU: 1. Lift up the socket lever. 2. Insert the CPU to the socket. Make sure that the notched corner of the CPU matches the pin 1 indicator on the socket. Be careful not to bend any pins. 3. Pull down the socket lever. STEP 1 Notched Corner STEP 2 STEP 3 Pin 1 Indicator Figure 1-7 4.
1.7 Video Memory Upgrade Larger video memory allows you to display higher resolutions and more colors. The system board comes with a 1-MB video memory onboard upgradable to 2 MB. Follow these steps to upgrade the video memory: 1. Locate the video DRAM upgrade sockets labeled U39 and U40 on the system board. See Figure 1-1. 2. Gently insert a 256K x 16, 60 ns EDO SOJ) chip into each of the upgrade sockets. Make sure that the pin 1 indicator on the chip matches the notched corner of the socket.
1.8 Second-level Cache Configuration The system board supports either 256-KB or 512-KB pipeline burst second-level cache. The cache size onboard is a manufacturing option. Table 1-9 shows the second-level cache configurations.
1.9 Audio Features The system board supports Sound Blaster Pro-compatible sound system. It has four connectors onboard to accommodate the audioI/O board, WaveTable, CD-ROM, and fax-voice modem. You may disable the audio feature in the BIOS Utility. Figure 1-9 shows the four audio connectors on the system board.
1.9.1 Installing the Audio-I/O Board The connector CN9 on the system board accommodates the audio-I/O board. Figure 1-10 shows how to install the board.
1.9.2 Audio-I/O Board Features The audio-I/O board consists of microphone port, line-in port, line-out port, and MIDI/game port. These ports accommodate the external audio devices. Microphone Connector Line-in Connector Microphone Port Line-in Port Line-out Port MIDI/Game Port Figure 1-11 Audio-I/O Board The internal connectors on the audio-I/O board are useful for system housings with built-in speakers, microphone, amplifier, or auxiliary devices.
1.9.3 WaveTable Daughterboard (Optional) The system board supports a WableTable daughterboard as option. The WaveTable does not come with the basic system. The WaveTable daughterboard supports the same external connectors as the audio-I/O board but comes with enhanced audio features. It bundles the Crystal chipsets that work together to produce better sound quality. Figure 1-12 shows the WaveTable daughterboard layout.
The WaveTable has two connectors, CN5 and CN6, located underside. Match these two connectors with the audio-I/O connector (CN9) and WaveTable connector (CN6) on the system board. Figure 1-13 shows how to install the WaveTable connector.
1.9.4 Audio-I/O Devices Figure 1-14 shows the various devices that you can connect to the audio-I/O board.
1.10 QuickStart Power Saving Feature The system board supports a special power saving feature called QuickStart mode. QuickStart turns off the hard disk, monitor, keyboard, and mouse once you press the power switch for less than four seconds while the system is on. This feature requires the Power Saving Operation Mode parameter in the BIOS to be set to QuickStart. See section 2.4 for more information on the setting description. The system board comes with connectors to support the QuickStart feature.
Power HDD/MSG Figure 1-15 Power and HDD/MSG Connector (JP48) Figure 1-16 shows the locations of JP48 and JP50 on the system board and which cables to connect to them.
1.10.2 QuickStart Mode Operation At any time while the system is running, enter the QuickStart mode by simply pressing the power switch for less the four seconds. This action causes the system to rest (QuickStart state 1) by turning off the keyboard, mouse, and monitor. After the specified time in the QuickStart State Timer parameter in BIOS, the system sleeps (QuickStart state 2) and turns off the hard disk.
1.11 Installing ISA Cards Both PnP and non-PnP ISA cards require specific IRQs. When installing ISA cards, make sure that the IRQs required by these cards are not previously assigned to PCI devices to avoid resource conflicts. Follow these steps when installing ISA cards: 1. Remove all PnP cards installed in the system, if any. 2. Enter BIOS utility and set the Reset Resource Assignment parameter to Yes to clear the resource data assigned to the PnP devices. Refer to section 2.6.5. 3.
1.12 Error Messages Do not continue using the computer if you receive an error message of any type. Note the message and take corrective action. This section explains the different types of error messages and corresponding corrective measures. There are two general types of error messages: • • Software System 1.12.1 Software Error Messages Software error messages are returned by your operating system or application.
Table 1-10 System Error Messages Message Action CMOS Battery Error Replace the RTC chip or contact your dealer. CMOS Checksum Error Check the RTC chip and the necessary jumper. If the battery is still good, run Setup. Display Card Mismatch Run Setup Diskette Drive Controller Error or Not Installed Check and connect the control cable to the diskette controller. Diskette Drive Error Diskette may be defective. If not, replace the diskette drive.
Table 1-10 System Error Messages (continued) Message Memory Error at: MMMM:SSSS:OOO (W:XXXX, R:YYYY) Action Check SIMMs on the system board. Contact your dealer. where: M: MB, S: Segment, O: Offset, X/Y: write/read pattern CPU Clock Mismatch Run Setup. Check if the CPU clock is correct. If correct, exit Setup and reboot the system. If the error message reappears, ask for technical assistance. Onboard Serial Port 1 Conflict Run Setup and disable the port.
1.12.3 Correcting Error Conditions As a general rule, if an error message says "Press F1 to continue," it is caused by a configuration problem, which can be easily corrected. An equipment malfunction is more likely to cause a fatal error, i.e., an error that causes complete system failure. Here are some corrective measures for error conditions: 1. Run Setup.
