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Mitsubishi Electric apricot ls/vs550 Owner's Handbook Manual

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Owner's Handbook



  Summary of Contents for Mitsubishi Electric apricot ls/vs550

  • Page 2 OWNER’S HANDBOOK APRICOT LS/VS550 with Pentium-Pro processor...
  • Page 3 Intel, Pentium ® and Pentium ® Pro are registered trademarks of Intel Corporation. ® ® Microsoft, MS-DOS, Windows 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.
  • Page 4: Table Of Contents

    CONTENTS Safety and regulatory notices General Standards Power connection information Power - UK only FIRST STEPS System rear Audio subsystem Turning on and booting Energy saving features Turning the power off Opening the system unit The components inside THE SYSTEM DRIVES Using the floppy drive Using a CD-ROM drive Optional PD drive...
  • Page 5 C o n t e n t s TROUBLESHOOTING Problems when starting Troubleshooting checklist The system’s disk drives SYSTEM MOTHERBOARD Major board features Jumpers and control connections Replacing the CMOS battery Upgrading the motherboard Adding more memory Upgrading the processor SYSTEM BIOS AND SETUP Entering Setup Control keys...
  • Page 6: Safety And Regulatory Notices

    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.
  • Page 7: Standards

    S a f e t y a n d r e g u l a t o r y n o t i c e s Standards Safety This product complies with the European safety standard EN60950. When required, any applicable national deviations for the country in which it is sold will be shown on an appropriate label affixed to the system underside.
  • Page 8: Power Connection Information

    S a f e t y a n d r e g u l a t o r y n o t i c e s Power connection information Typical AC plugs 125V 250V 250V 250V 250V BS1363A SHUCO NEMA 5-15P SRAF 1962/DB16/87 ASE 1011 U.
  • Page 9 S a f e t y a n d r e g u l a t o r y n o t i c e s Power Cable Connections - UK ONLY This equipment is supplied with an AC power lead that has a moulded, non-removable, 3-pin AC plug.
  • Page 10: First Steps

    FIRST STEPS You should read this chapter even if you do not read any other. It provides important basic information to help you in using your computer. It is the minimum you need to know in order to use your computer safely and with ease. System rear 10 10 1 1.
  • Page 11: Audio Subsystem

    F i r s t s t e p s Audio subsystem (option) 10101 Joystick/MIDI port Line out Microphone Speakers Line in The motherboard sound system is a Creative Labs Vibra, full 16 bit. Audio output from the CD-ROM drive is internally connected to the Vibra sound system.
  • Page 12: Energy Saving Features

    F i r s t s t e p s If nothing happens when the P button is pressed, check that OWER the system unit and monitor power cords are securely connected and that the AC power supply is switched on. See also the chapter on ‘Troubleshooting’.
  • Page 13: Turning The Power Off

    F i r s t s t e p s Warning Warning The energy saving features built into this computer are designed to be used with the monitor supplied with the system. If you wish to use another, or older monitor it may not be compatible and permanent damage may be caused.
  • Page 14: Opening The System Unit

    F i r s t s t e p s It may be advantageous on some occasions to use the ‘Energy Saving’ features of the computer. Press the purple button on the front panel and put the system into ‘Low Power’. This will provide a quick start up next time you use the system.
  • Page 15: The Components Inside

    F i r s t s t e p s The components inside* Power supply System cooling fan Hard disk (below CD-ROM) Motherboard CD-ROM drive Expansion riser board Floppy drive Rear audio board (option) ∗ Please note that, for clarity, all the power and signal cables are not shown in the above illustration.
  • Page 16: The System Drives

    THE SYSTEM DRIVES Using the floppy disk drive The floppy disk drive is usually configured in the system BIOS as drive A:, with a capacity of 1.44 Mbytes. Floppy disks should be kept away from bright sunlight, dust, moisture and any strong magnetic fields. Avoid opening the metal window on the disk as this exposes the magnetic surface to contamination which could render the disk useless.
  • Page 17: Using A Cd-Rom Drive

    S y s t e m D r i v e s Using a CD-ROM drive The CD-ROM drive can retrieve multimedia data from CD-ROM discs and multi-session Photo-CD discs. It can also play normal audio CDs. It is important that the computer is not moved while a CD is in the drive, especially if the CD is being accessed at the time.
  • Page 18 S y s t e m D r i v e s Inserting a compact disc Press the button on the front of drive. EJECT Place the CD centrally, printed side up, on the platter. If the platter ejected fully, push the button again, or EJECT gently push the front of the platter, and it will be drawn back...
  • Page 19: Optional Pd Drive

    S y s t e m D r i v e s Emergency CD removal CO MP AC To remove a CD manually (for example, during a power failure) you must first ensure that the computer is turned off. Insert a thin metal rod (such as an unwound paper clip) into the emergency eject hole.
  • Page 20 S y s t e m D r i v e s CO MP AC U S Y P D /C D B Drive tray Media indicator Emergency eject Drive active indicator Headphone socket Tray eject button Headphone volume The drive can handle the large and small types of CD-ROM (as well as music CDs), or it will accept the PD recordable cartridge: PD /C D BU These cartridges have a capacity similar to a CD-ROM but with the...
  • Page 21: Hard Disk Drives

    S y s t e m D r i v e s The drive control software provides two icons, each with its own drive letter. These will be found in Windows Explorer, or the drives section in the control panel. One is for use with data cartridges, the other is for CD-ROM and is easily identified as such with a CD symbol.
  • Page 22: Installation Of A Second Hdd

    S y s t e m D r i v e s system BIOS is capable of handling this. If the SCSI interface is used the computer may have several devices connected to the same interface, each one requiring its own individual ‘ID’ to be set. Installing and setting up a second hard drive is not difficult, but if you do not feel confident about installing a second hard drive you may wish to have your supplier or an authorised engineer complete this task.
  • Page 23 S y s t e m D r i v e s IDE drive IDE drive The master, or first drive, should have a link across DS. On a slave, or second drive, remove the link, but retain it by placing it onto one of the two pins as shown in the following illustration.
  • Page 24: System Expansion

    SYSTEM EXPANSION Your computer can accept various expansion cards or boards. Most are simple to install. You can extend the capabilities of the computer by installing, for example, a modem, TV card, or network interface. Most modern cards are very simple to install, particularly Peripheral Component Interface (PCI) types as they are ‘plug and play’...
  • Page 25 E x p a n s i o n ♦ Direct memory access (DMA) channel ♦ Base input/output (I/O) port address ♦ Base memory address The settings used by the card must be different to existing hardware in the computer. The settings must not conflict with other cards or a component on the motherboard.
  • Page 26 E x p a n s i o n Default assignment Available? IRQ8 Real time clock IRQ9 Yes* IRQ10 Yes* IRQ11 Yes* IRQ12 Mouse IRQ13 Coprocessor IRQ14 Primary ATA/IDE interface Optionally* IRQ15 Secondary ATA/IDE interface Optionally* *If SCSI is used in place of IDE, ’Plug and Play’ can place SCSI controller in one of these.
  • Page 27 E x p a n s i o n Base input/output (I/O) port address Some expansion cards are also controlled by I/O ports or ‘address space’. The base I/O port address specifies where the card’s ports begin. The following table lists the I/O ports used by devices on the motherboard.
  • Page 28: Installing The Card

    E x p a n s i o n The card’s documentation should list its possible base memory addresses. You will also need to know how much memory the card has, so that you can leave the right gap between this card’s base address and the next.
  • Page 29 E x p a n s i o n Position the expansion card alongside the slot in which you wish to install it. Align the rear of the card with the slot in the rear of the system unit, and, if the card is full length, align the front of the card with the card guide.
  • Page 30: Troubleshooting

    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 and connectors inside the computer when fitting expansion cards, or upgrading the motherboard, or indeed anything that may require temporary removal of the system cover.
  • Page 31 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 power-on self-test (POST) routine tests various hardware components, including memory, and compares the actual configuration of the computer with that recorded in configuration (CMOS) memory.
  • Page 32: Troubleshooting Checklist

    T r o u b l e s h o o t i n g Boot failure message Explanation formatted. Insert a system diskette, press F1, and format the hard disk as described in your operating system manuals. Fixed disk read failure The hard disk may be defective.
  • Page 33: The System's Disk Drives

    T r o u b l e s h o o t i n g Monitor If there is no display check that the monitor is turned on, and the brightness and contrast controls are not too low. If you have fitted a new video controller expansion card and subsequently encounter problems try disabling the on-board video controller by removing a jumper from the motherboard.
  • Page 34 T r o u b l e s h o o t i n g 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.
  • Page 35: System Motherboard

    SYSTEM MOTHERBOARD Major board features Com 1 Parallel Com 2 USB (optional) Mouse Key/Bd CD-ROM audio connector IDE primary connector VRM8 socket Aux. audio connector IDE secondary connector Zif socket for processor modem audio input Floppy drive connector CMOS battery (CR2032) Main PSU connections PSU 3.3V aux.
  • Page 36: Jumpers And Control Connections

    S y s t e m m o t h e r b o a r d Jumpers and control connections J80 - audio enable/disable PL74 and PL75 - fan connectors PL86 - speaker links J70 - Reserved. Do not move. J40 - hard disk LED select J72 - battery disconnect J71 - Reserved.
  • Page 37 S y s t e m m o t h e r b o a r d Processor clock multiplier, J1 to 4 Ratio 11/2 Strictly reserved I=jumper fitted O=No jumper X=Don’t care Bus speed select, J32 Frequency Jumper J32 60 MHz No jumper 66 MHz...
  • Page 38 S y s t e m m o t h e r b o a r d Audio disable, J80 Audio J80 1-2, Enable Audio 2-3, Disable Audio On-board SCSI Interface, J90 & J91 Link SCSI Enable - J90 SCSI Type - J91 Link 1 - 2 Enable SCSI...
  • Page 39 S y s t e m m o t h e r b o a r d Fan Connectors, PL73 & PL74 Pins CPU Fansink PL73 Pins Main fan PL74 Ground Ground Fan Fail Controlled supply + 12 volts Ground Front and panel connectors, PL70 &...
  • Page 40: Replacing The Cmos Battery

    S y s t e m m o t h e r b o a r d Replacing the CMOS battery The battery is a 3 volt lithium type (CR2032 or equivalent) typically used in calculators, watches and other small, battery- powered electronic items.
  • Page 41: Upgrading The Motherboard

    S y s t e m m o t h e r b o a r d Upgrading the motherboard Caution Caution Care must be taken in the purchase of upgrade parts to ensure both compatibility with the system and the compliance with appropriate approvals and certification, e.g., CE marking within Europe.
  • Page 42 S y s t e m m o t h e r b o a r d Turn off the computer and unplug all power cords. Take suitable anti-static precautions and remove the system unit cover. You may have to remove the floppy disk drive module which partly restricts access to the memory sockets (first identifying the way all cables are fitted) by disconnecting the cables, loosening the screws and lifting out.
  • Page 43: Upgrading The Processor

    S y s t e m m o t h e r b o a r d To remove a DIMM Gently press the tabs on both of the end clips at the same time. This will release the DIMM and lift it out of its socket. Lift the module clear of its socket.
  • Page 44 S y s t e m m o t h e r b o a r d Changing the processor To remove the existing processor: Turn off the computer and unplug all power cords. ◊ If the system was in use just before starting this procedure, the processor will be hot, wait at least 15 minutes for it to cool down.
  • Page 45 S y s t e m m o t h e r b o a r d Lift the processor out of the socket and place it on an anti- static surface outside the system unit. Hold the processor by its edges and avoid touching any of the metal pins.
  • Page 46 S y s t e m m o t h e r b o a r d To fit the upgrade processor Ensure that the securing lever on the ZIF socket is still in the upright position. Take the upgrade processor out of its anti-static packaging. Hold the processor by its edges and avoid touching the metal pins.
  • Page 47: System Bios And Setup

    SYSTEM BIOS AND SETUP The basic input-output system (BIOS) is permanently encoded in an area of read-only memory (ROM). It can be modified or upgraded if necessary, but this is recommended to be undertaken by an authorised engineer. It requires specialist software. BIOS Setup is a utility within the computer BIOS.
  • Page 48: Control Keys

    S y s t e m B I O S a n d S e t u p If Setup runs on its own This can happen for three reasons: ♦ Power on self test (POST) detects a configuration error or fault.
  • Page 49: Main Menu Screen

    S y s t e m B I O S a n d S e t u p Keys to use Function To toggle values or settings. The enter key, to select the highlighted item. Numbers, used in places where values are to be entered.
  • Page 50 S y s t e m B I O S a n d S e t u p The Save Settings options saves any changes that you have made so far. The Restore Settings option restores the settings that were in effect when you started the BIOS Setup utility (with the notable exception of the Date and Time settings).
  • Page 51 S y s t e m B I O S a n d S e t u p Any parallel port devices that you may wish to attach, such as a tape streamer or external hard drive etc., should have full instructions supplied with them that will tell you if the port capabilities need to be manually altered to one of the extended options listed.
  • Page 52 S y s t e m B I O S a n d S e t u p Hard disk drives Hard disk size, type and mode, is auto-detected when the computer is turned on, and the most suitable mode will have been selected. Do not alter this mode as it may cause your hard disk to be inaccessible, or the data to be lost.
  • Page 53 S y s t e m B I O S a n d S e t u p If you want the computer to ask for the power-on password, ensure that Password Prompt is set to “On”. If this option is set to “Off”, the computer will still require the password but will not ask for it.
  • Page 54 S y s t e m B I O S a n d S e t u p Keyboard Numlock State If set to ‘On’ (default), the keys on the numeric keypad (on the right-hand side of the keyboard) will produce numbers when pressed.
  • Page 55 S y s t e m B I O S a n d S e t u p Power On Self Test The POST can be selected to either run only a ‘Quick’ set of tests or a more thorough (but longer) ‘Enhanced’ set. Virus Detection If this option is ‘Enabled’, each time the computer boots the BIOS will check the startup device to find if a boot sector virus has crept...
  • Page 56 S y s t e m B I O S a n d S e t u p PCI Settings The only configurable PCI setting is Palette Snooping. This can be ‘Enabled’ or ‘Disabled’ and should be enabled only for PCI video expansion cards that specify it as being required.
  • Page 57: Beep Codes

    S y s t e m B I O S a n d S e t u p Power Management The power management features provided aim to reduce the amount of electricity consumed by your computer if it should be left idle.
  • Page 58 S y s t e m B I O S a n d S e t u p Repeating short beeps. Usually indicative of a keyboard key stuck down, but may be due to the keyboard interface failing. One long and one short beep. POST has detected an error on the video adapter in the system.
  • Page 59: Error Messages

    S y s t e m B I O S a n d S e t u p Error Messages If you get an error which is not listed or the problem persists, call your maintenance provider. Code Cause Code Cause Keyboard locked Keyboard clock line failure Boot failure.
  • Page 60 S y s t e m B I O S a n d S e t u p Notes Use this area to make a note of your current BIOS settings for future reference. 6/14 LS/VS550 OWNER’S HANDBOOK...
  • Page 61 APPENDIX Cleaning and transporting Suitable antistatic precautions...
  • Page 62: Cleaning And Transporting

    CLEANING AND TRANSPORTING Cleaning the computer Do not use solvents or abrasives, they might damage the system unit surfaces. Do not use aerosols or sprays near any part of the system, in particular, air vents or grills, ports, or removable-media drives, as microscopic droplets can remain in the air for some time and then be sucked in when you switch on and cause irreparable damage.
  • Page 63 C l e a n i n g a n d T r a n s p o r t i n g Regularly check the keyboard cable for wear and tear, particularly near table or shelf edges. Take care not to spill any liquid or drop small objects, e.g. paper clips or staples, onto the keyboard.
  • Page 64 C l e a n i n g a n d T r a n s p o r t i n g or dust that has collected on the rollers, rotating them to reach all of their surfaces. Use clear water, or water with a mild detergent, to clean the ball.
  • Page 65 ANTI-STATIC PRECAUTIONS Static electricity can cause permanent damage to electronic components. You should be aware of this risk, and take precautions against the discharge of static electricity into the computer. Static electricity can be generated by moving on a chair, brushing against desks or walls, or simply walking across an ordinary carpet.
  • Page 66 A n t i - s t a t i c p r e c a u t i o n s ♦ Handle static-sensitive items with extreme care. Hold expansion cards and add-on components only by their edges, avoiding their electrical contacts. Never touch the components or electrical contacts on the motherboard or on expansion cards.