APRICOT LS S ERIES BX chipset motherboard with Pentium®II processor OWNER’S HANDBOOK...
® Intel and Pentium II are registered trademarks of Intel Corporation. ® ® Microsoft, MS-DOS, Windows 95 and Windows NT are registered trademarks of Microsoft Corporation in the US and other countries. Other trademarks mentioned within this document and not listed above are the properties of their respective owners.
CONTENTS Safety and Regulatory notices General Maintenance and Transporting Standards and Legalities Power connection Welcome Unpacking Pictorial guide to the system unit Removing panels General advice Connecting the components Getting Started Turning on the PC Power saving Shutting down the PC Using the computer for the first time Electronic Fingerprinting Backing-up the pre-installed software...
C o n t e n t s Expansion Cards Configuring the card Installing the card Reserving ISA legacy resources Telling Windows about the new hardware Motherboard Features & Upgrades Motherboard detailed view Motherboard features and jumpers Motherboard IRQs and DMA channels Replacing the configuration battery Upgrading the motherboard Adding and removing DIMMs...
SAFETY AND REGULATORY NOTICES General Electrical The computer uses a safety ground and must be earthed. The system unit AC power cord is its ‘disconnect device’. Ensure that the system unit is positioned close to the AC power outlet and that the plug is easily accessible.
S A F E T Y & R E G U L A T O R Y N O T I C E S Ergonomic When positioning the system unit, monitor and keyboard, take into account any local or national regulations relating to ergonomic requirements.
S A F E T Y & R E G U L A T O R Y N O T I C E S Maintenance Switch off and disconnect all cables before attempting to clean the computer. Do not use sprays, solvents or abrasives that might damage the system unit surface.
S A F E T Y & R E G U L A T O R Y N O T I C E S Standards Safety This product complies with the International safety standard IEC950 and the European safety standard EN60950 which will, when applicable, include the national deviations for the country in which it is sold.
S A F E T Y & R E G U L A T O R Y N O T I C E S Power Connection Typical AC plugs 250V 125V 250V 250V 250V BS1363A SHUCO NEMA 5-15P SRAF 1962/DB16/87 ASE 1011 U.
S A F E T Y & R E G U L A T O R Y N O T I C E S Connecting to the AC power supply IMPORTANT Any peripheral equipment that requires an AC power cord must be earthed. Use the following guidance to connect the components together.
WELCOME This chapter gives you a quick tour of your new Apricot LS Personal Computer. As soon as you’ve unpacked the components and assembled them, you should progress to the next chapter, Getting Started. Throughout this manual ‘Windows’ means Microsoft Windows 95 or Windows NT 4.x, unless otherwise stated.
W e l c o m e Pictorial guide to the system unit CO MP ACT button CD phono jack & volume control OWER CD E button Diskette drive JECT CD emergency eject hole Infrared sensor (optional) CD-ROM disc drawer (platter) Hard disk activity indicator CD activity indicator Use the P...
W e l c o m e 10 10 1 10 10 1 Casing screws for the top cover Parallel (printer) port AC power outlet for monitor Video out port (option) Voltage selection switch Monitor port AC power inlet from AC supply PCI slot (full-length) Double USB port ISA slot (full-length)
W e l c o m e To remove the system unit cover Shut down the computer and turn off the monitor. If your AC power outlets have switches, set them to their off positions. Unplug all power cords from the rear of the system unit. Turn the caselock key to the unlocked position.
W e l c o m e Power supply CD-ROM (optional) housing Hard disk drive housing (under CD-ROM) Floppy diskette drive Case fan* Memory (DIMM) sockets Pentium® II processor Video memory (SoDIMM) socket The fan speed and thus system noise, can vary. The fan is controlled by a temperature sensor on the processor, which gets warmer during some operating conditions, such as intensive software usage.
W e l c o m e General advice This computer is designed to be used in a normal home or office environment. Here are a few hints for choosing a suitable site: Place the system unit flat on a sturdy, level surface, free from vibration.
W e l c o m e Connecting the components Use the following guidance to connect the components together. It is important that you take each step in the order indicated. Before connecting any components, ensure that the AC power supply is switched off or disconnected, and that the system unit, the monitor, and any peripherals are turned off.
GETTING STARTED You should read this chapter even if you do not read any other. It provides important information to help you to use your Apricot PC safely and efficiently. Turning on the PC To turn on the computer, simply press the P button.
G e t t i n g S t a r t e d Power saving Use the P button to turn the computer on and change power OWER modes. The colour of the indicator light on the P button OWER shows the current power mode: [red]...
G e t t i n g S t a r t e d Automatic power saving If you leave your PC running Windows 95 or Windows for Workgroups without doing anything, it moves automatically to Suspend [yellow] mode. Press the P button to wake it up OWER again.
G e t t i n g S t a r t e d After you shut down the PC, wait at least 5 seconds before turning it on again. The computer may not initialise itself properly if you turn it off then on again in quick succession. Emergency shut down In exceptional circumstances, you can put your PC into Off [red] mode without shutting down Windows first.
G e t t i n g S t a r t e d Electronic Fingerprinting Electronic Fingerprinting allows you to ‘brand’ your computer by storing personal information in its permanent memory. If you include your name, address and phone number this will aid the police if your computer is stolen.
Apricot PCs arrive with a pre-installed copy of Windows 95, Windows NT or Windows for Workgroups. Additional software may be pre-installed at the factory or by your Mitsubishi Electric PC supplier. We recommend that you copy or ‘back-up’ any pre-installed software soon after setting up the system.
Windows is sure to display correctly whatever monitor you have. Most modern monitors, including Mitsubishi Electric monitors, can display higher resolutions than standard VGA. You can change the setting to one that more closely matches your own monitor, to get the best performance from it.
G e t t i n g S t a r t e d If your hard disk is larger than 2 gigabytes If your Apricot PC is pre-installed with Windows 95, the entire hard disk is initially formatted as one partition. If you have Windows NT, the first 2 Gbytes are formatted (using FAT) as a primary partition.
DISKETTES and CDs Diskette drive Your Apricot PC is fitted with a 1.44 Mbyte diskette drive. This accepts either 1.44 Mbyte (HD) or 720 Kbyte (DD) diskettes. Each diskette has a rigid plastic cover, with a metal shutter that guards the disk surface. Never touch the exposed surface under the shutter –...
D i s k e t t e s & C D s If a diskette becomes stuck in the drive, perhaps because its label has peeled back, do not attempt to remove it with tweezers or any similar implement; you risk damaging the drive. Call an authorised maintainer.
D i s k e t t e s & C D s CD-ROM drive (optional) The CD-ROM drive can retrieve multimedia data from CD-ROM discs and multi-session Photo-CD discs. It can also play normal music CDs (the drive has its own headphone jack and associated volume control).
D i s k e t t e s & C D s Inserting a compact disc Press the button on the front of drive. EJECT Place the CD centrally, printed side up, on the platter. Push the button again, or gently push the front of the EJECT platter to draw it back into the drive.
This system, (when sold) complies with the CE Marking Directive and its strict legal requirements. Use only parts tested and approved by Mitsubishi Electric PC Division. Failure to do so may result in invalidating both the compliance and your warranty. All expansion cards and drives must carry the CE mark.
E x p a n s i o n C a r d s Configuring the card Part of the installation procedure for an expansion card involves setting up or “configuring” the card so it will work correctly in the computer.
E x p a n s i o n C a r d s ISA Interrupt request level (IRQ) The “interrupt request level” or “IRQ” is the means by which the expansion card sends a signal to get the attention of, or interrupt, the processor.
E x p a n s i o n C a r d s Base memory address Some expansion cards are fitted with memory of their own, usually read-only memory (ROM) containing functional extensions to the computer’s BIOS (basic input/output system) ROM. Some cards also have random-access memory (RAM).
E x p a n s i o n C a r d s Installing the card Read all these instructions through before attempting to install any expansion card. WARNING Never carry out any work inside the computer with AC power applied.
E x p a n s i o n C a r d s If the card you are installing is configured by the means of jumpers or switches, check that it is correctly configured before proceeding. When installing a card that uses the VESA/AMC video feature connector on the motherboard, it is best to plug the video feature cable into the motherboard before you install the card;...
E x p a n s i o n C a r d s 10. Connect any necessary signal cables to the card. 11. Ensure no other cables or connectors have become dislodged, then replace the system unit cover. Reserving ISA legacy resources If you have just installed an ISA card, your first task after turning on the computer is to run the BIOS Setup utility and reserve or exclude the legacy resources (that is, the interrupts and UMB...
CAUTION Do not alter any jumpers or switch settings other than those identified in this chapter, unless told to by your Mitsubishi Electric PC supplier or an authorised maintainer. Otherwise, you may damage the system processor, the motherboard, or both.
M o t h e r b o a r d f e a t u r e s a n d u p g r a d e s Major board features 1 Aux. audio input (option) 9 ‘Wake on LAN’ connector 17 Processor heat sense input 2 Floppy drive interface 10 ‘Wake on MODEM’...
M o t h e r b o a r d f e a t u r e s a n d u p g r a d e s LM78 System Monitor The motherboard has an on board monitoring system provided by an LM78 device.
M o t h e r b o a r d f e a t u r e s a n d u p g r a d e s On-board video disabling (J1) If you install a video adapter expansion card, the computer should automatically detect this and disable the on-board video adapter.
M o t h e r b o a r d f e a t u r e s a n d u p g r a d e s BIOS upgrade and reprogram (J12, J2) These jumpers should not normally be changed except by a service engineer or at the direction of a service engineer.
M o t h e r b o a r d f e a t u r e s a n d u p g r a d e s Motherboard IRQs Components Interrupts (IRQs) System timer Keyboard controller PIC daisy chain Serial port 2 Serial port 1 Audio...
M o t h e r b o a r d f e a t u r e s a n d u p g r a d e s Replacing the configuration battery The computer keeps a record of its current hardware configuration in a CMOS memory chip which is sustained by a small battery.
M o t h e r b o a r d f e a t u r e s a n d u p g r a d e s Removing a DIMM Do not use excessive force. If the module will not come free easily, check that the holding clips are clear of the module ends.
M o t h e r b o a r d f e a t u r e s a n d u p g r a d e s The processor assembly To remove the existing processor Turn off the computer and unplug all power cords. Take suitable anti-static precautions and remove the system cover.
M o t h e r b o a r d f e a t u r e s a n d u p g r a d e s Disconnect the heat sensor connector (marked ‘C’ on the illustration) that goes to PL9 on the motherboard. See ‘A’...
M o t h e r b o a r d f e a t u r e s a n d u p g r a d e s Refit the heatsink support, making sure that it is correctly and fully seated on the pins.
HARD DISK UPGRADES This chapter describes how to add a second hard disk to your computer. WARNING Never carry out any work inside the computer with AC power applied. Always shut down the computer and unplug all power cords before removing the top cover. Configuring the drive Your computer can accommodate two E-IDE hard disk drives, known as the master and slave drives.
H a r d D i s k U p g r a d e s Installing the drive To install a second hard disk drive: Turn off the computer and unplug all power cords. If there is a diskette in the diskette drive, remove it. Take suitable anti-static precautions and remove the system unit cover.
H a r d D i s k U p g r a d e s Fit the new (slave) hard drive into the HDD assembly using the special screws provided. Try not to touch either drive’s electronics. Put the HDD assembly back into the system unit and tighten the (C) screws to secure it to the chassis.
H a r d D i s k U p g r a d e s Partitioning and formatting the drive The first time you turn on the computer after fitting the new drive, the power-on self-test (POST) detects the change in configuration and starts the BIOS Setup utility automatically.
BIOS SETUP & POST BIOS (pronounced “bye-oss”) stands for ‘basic input/output system’. The BIOS mediates between the computer’s hardware – the processor, memory, and so on – and its software – the operating system and your programs. The BIOS program is kept in permanent, read-only memory or ROM (although if necessary it can be upgraded by an authorised maintainer).
B I O S S e t u p & P O S T BIOS Setup To start the BIOS Setup utility: Turn on or restart your computer. Wait until the Mitsubishi Electric logo appears on the screen. Press the 2 key. If you have previously defined a Supervisor password, you are prompted for it before BIOS Setup starts.
B I O S S e t u p & P O S T Changeable fields are enclosed in square brackets. To select an item, use the arrow keys to move the cursor to the field you want. Then use the (+) and (–) keys to select a value for that field.
B I O S S e t u p & P O S T Reserving ISA legacy resources To reserve interrupts and upper memory block (UMB) regions for ISA expansion cards, go to the Advanced menu, select PCI Configuration, then select PCI/PNP ISA IRQ Resource Exclusion or PCI/PNP ISA UMB Region Exclusion as required.
B I O S S e t u p & P O S T Power-on self-test Recoverable POST errors Whenever a recoverable (non-terminal) error occurs during POST, the BIOS displays an error message describing the problem (the most usual are described below). After some messages, you may be prompted to Press <F1>...
B I O S S e t u p & P O S T Incorrect drive A type - run SETUP The diskette drive is not correctly specified in BIOS Setup. Invalid NVRAM media type Problem with NVRAM (non-volatile random-access memory). Keyboard error [nn] or Keyboard controller error There is a problem with the keyboard or (less likely) the standard I/O controller on the motherboard.
B I O S S e t u p & P O S T Terminal POST errors and beep codes There are several POST routines that shut down the computer if they fail. If possible, the BIOS displays a two-digit hexadecimal code and/or sounds a sequence of beeps to identify the point at which POST failed.
TROUBLESHOOTING This chapter offers advice if you suspect a fault with your computer. It is concerned mainly with problems caused by the computer itself; problems more often arise from other sources such as your operating system or application software. It must also be remembered that it can be very easy to leave off or dislodge cables inside the computer when fitting expansion cards, or upgrading the motherboard, or indeed anything that requires temporary removal of the system cover.
T r o u b l e s h o o t i n g Power-on self-test (POST) Whenever the computer is turned on, the BIOS POST routine tests various hardware components, including memory, and compares the actual configuration of the computer with that recorded in CMOS memory.
T r o u b l e s h o o t i n g another system diskette, if possible. Make sure that a boot device is correctly specified with the BIOS Setup utility. If the problem persists contact your supplier or authorised maintainer.
T r o u b l e s h o o t i n g grease and dust from the rollers inside the mouse with a cotton swab moistened with a solvent cleaner. Keyboard If the keyboard response is poor, something may be trapped under the keys.
T r o u b l e s h o o t i n g diskettes during certain other operations, or until you are about to exit the program. CD-ROM drive If you have problems accessing a CD, check that you have allowed a few seconds for the disk to spin up to full speed, that the disk is the correct way up in the drive (printed side upwards) and that it is a data CD.
EQUIPMENT LOG Use this equipment log to record information about your PC. In particular, you must keep a record of the 12-digit fall-back password of the Electronic Fingerprinting security feature (see the Getting Started chapter for more information). Record the password in the space provided below, then store this page (or the whole manual) in a safe place.
E q u i p m e n t l o g Expansion cards Manufacturer Description Serial number Other information It may be useful to note any additional information here such as date of purchase, supplier, etc., along with the phone number of your maintenance provider.
16339631 MITSUBISHI ELECTRIC MITSUBISHI ELECTRIC PC DIVISION PC DIVISION Apricot Computers Limited Apricot Computers Limited 3500 Parkside Niederlassung Deutschland Birmingham Business Park Gothaer Strasse 27 Birmingham B37 7YS 40880 Ratingen United Kingdom Germany Tel +44 (0) 121 717 7171 Tel +49 (0) 2102 4556...