Acer 486 Скачать руководство пользователя

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1-2

User’s Guide

1.1

System Board Layout

The system board has the following major components:

•

486SX, SX2, DX2, or DX4 series CPU

•

4-MB onboard RAM expandable to 36 MB

•

Two 72-pin SIMM sockets for memory upgrade

•

128-KB ROM for system BIOS and VGA BIOS

•

120-pin connector for ISA riser card

•

System clock/calendar

•

Two 9-pin serial ports

•

One 25-pin Centronics parallel port

•

PS/2-compatible keyboard and mouse interface

•

512-KB or 1-MB DRAM for onboard local bus VGA interface;
expandable to 1 MB (for GD-5424) or 2 MB (for GD5429)

•

Embedded fixed disk interface

•

Upgradable cache memory (128-KB or 256-KB)

•

Optional enhanced IDE interface

•

Optional power daughter board that enables the system to
support the 3.3V microprocessors

Figure 1-1 shows the board layout and the locations of the important
components.

Содержание 486

Страница 1: ...ystem architecture is based on the VESA local bus featuring an onboard VGA The VGA memory is expandable to 1 MB or 2 MB In a LAN environment the system supports 16 bit Arcnet cards Ethernet cards and Token Ring cards It is fully compatible with Novell NetWare and Microsoft LAN Manager and also with SCO UNIX XENIX and OS 2 operating systems The system has a number of software controlled security fe...

Страница 2: ...ck calendar Two 9 pin serial ports One 25 pin Centronics parallel port PS 2 compatible keyboard and mouse interface 512 KB or 1 MB DRAM for onboard local bus VGA interface expandable to 1 MB for GD 5424 or 2 MB for GD5429 Embedded fixed disk interface Upgradable cache memory 128 KB or 256 KB Optional enhanced IDE interface Optional power daughter board that enables the system to support the 3 3V m...

Страница 3: ...tor 7 IDE fixed disk connector 1 23 Parallel port 8 Diskette drive connector 24 COM2 port 9 ISA riser card connector 25 COM1 port 10 Local bus IDE controller 26 PS 2 mouse connector 11 M1431 system chip 27 PS 2 keyboard connector 12 Second level cache 28 VGA upgrade sockets 1 MB 13 Power daughter board connectors 29 VGA upgrade sockets 2 MB 14 TAG RAM 30 Onboard VGA memory 512 KB 15 Fan power conn...

Страница 4: ...ated circuits are extremely susceptible to electrostatic discharge Do not handle ICs unless you are a qualified service technician using tools and techniques that conform to accepted industry practices 1 3 Pre installation Instructions Follow these steps before you install a system component 1 Turn off the system power and all the peripheral devices connected to the unit before you open it 2 Open ...

Страница 5: ... Board 1 5 Do not attempt the procedures described in the following sections unless you are a qualified service technician 1 4 Jumper Settings Figure 1 2 shows the jumper locations Figure 1 2 Jumper Locations ...

Страница 6: ...e onboard VGA JP16 Open Closed Enable onboard local bus IDE Disable onboard local bus IDE JP21 Closed Open Enable onboard super I O chip Disable onboard syper I O chip JP28 1 2 2 3 Enable onboard memory Disable onboard memory JP37 38 1 2 2 3 Enable Reset button Enable Suspend Resume button Table 1 2 CPU Clock Selection JP10 JP17 JP19 CN14 CPU Clock 2 3 2 3 2 3 3 7 33 MHz for SX 33 DX2 66 or DX4 10...

Страница 7: ...2 1 2 1 2 2 3 1 2 JP34 36 Closed Closed Closed Open Open Open Open JP39 1 2 4 5 1 2 4 5 1 2 4 5 1 2 4 5 1 2 4 5 1 2 4 5 2 3 5 6 JP40 41 2 3 2 3 2 3 1 2 1 2 2 3 2 3 JP42 2 3 2 3 2 3 2 3 2 3 2 3 1 2 JP43 Open Open Open Open Open Open Open JP46 1 2 2 3 2 3 1 2 1 2 1 2 1 2 JP47 1 2 1 2 1 2 1 2 1 2 2 3 1 2 JP48 Open Open Open Closed Open Open Open Table 1 4 Cache RAM Size Selection JP24 JP25 JP26 Cache...

Страница 8: ...dditional memory choose one of the SIMM configurations listed in Table 1 5 Table 1 5 Memory Configurations Onboard Socket 1 Socket 2 Total 4 MB 4 MB 4 MB 1 MB 5 MB 4 MB 1 MB 1 MB 6 MB 4 MB 1 MB 2 MB 7 MB 4 MB 4 MB 8 MB 4 MB 4 MB 1 MB 9 MB 4 MB 4 MB 2 MB 10 MB 4 MB 4 MB 4 MB 12 MB 4 MB 4 MB 8 MB 16 MB 4 MB 16 MB 20 MB 4 MB 16 MB 1 MB 21 MB 4 MB 16 MB 2 MB 22 MB 4 MB 16 MB 4 MB 24 MB 4 MB 16 MB 8 MB...

Страница 9: ... that the cut edge of the SIMM touches the base of the circle mark on the SIMM socket 2 Gently press the SIMM back against the holding clips on both ends of the socket until the peg slips into the holes on the SIMM and the holding clips lock the SIMM into position See Figure 1 3 3 Check that the SIMM is securely seated in its slot and that both ends are locked to the socket Figure 1 3 Installing a...

Страница 10: ...g clips on both sides of the SIMM outward to release it 2 Push the SIMM upward 3 Gently pull the SIMM out of the socket Figure 1 4 Removing a SIMM 1 5 3 Reconfiguring the System The system automatically detects the amount of memory installed Run Setup to view the new value for total system memory and make a note of it ...

Страница 11: ...ollowing items are damaged or missing contact your dealer immediately Upgrade CPU with heat sink Electrostatic discharge ESD gloves 1 6 2 Installing an Upgrade CPU Observe ESD precautions when installing components See section 1 2 Before installing an upgrade CPU check the following The heat sink is not oily The heat sink is well attached to the CPU The heat sink protects the CPU against excessive...

Страница 12: ...e 1 6 The flat corner on the CPU indicates pin 1 Insert the CPU pins into the socket pinholes gently but firmly Be careful not to bend any pins Figure 1 5 Pin 1 Indicator on the Upgrade CPUand Socket Figure 1 6 Installing an Upgrade CPU 5 Set the required jumpers on the system board Refer to section 1 4 for the jumper settings Pin 1 Indicator Pin 1 Indicator flat corner ...

Страница 13: ...ow these steps to install the power daughter board Before installing you must check first the voltage requirement of your upgrade CPU 1 Locate the power daughter board connectors marked as JP44 and JP45 on the system board See Figure 1 1 2 If your system board comes with a 5V CPU then you will find JP45 closed Remove the jumper cap of JP45 and insert the board into the connectors ...

Страница 14: ... further expand your VGA memory to 2 MB The additional memory allows your VGA to display higher resolutions and more colors when the appropriate VGA driver is used Follow these steps to upgrade the VGA RAM to 1 MB 1 Locate the VGA memory expansion sockets on the system board labeled U12 U13 U15 and U16 See Figure 1 7 2 Gently but firmly insert a 44256 DRAM 256 Kb x 4 70 ns DIP chip into each of th...

Страница 15: ...System Board 1 15 U12 U13 U15 U16 U9 U10 514260 DRAM 44256 DRAM Figure 1 7 Installing VGA RAM You do not need to change any jumper settings when upgrading the VGA memory ...

Страница 16: ...gure 1 8 TAG U56 U57 U58 U59 U60 U61 U62 U63 Figure 1 8 Installing Cache 3 Gently but firmly insert a 32 Kb x 8 15 ns SRAM chip into each of the sockets Be careful not to bend any pins Table 1 6 lists the cache size options and the corresponding chip configuration Table 1 6 Cache Size Options and Chip Locations Cache Size SRAM Type Location 128 KB 32 Kb x 8 x 5 pcs TAG U56 U58 U60 U62 256 KB 32 Kb...

Страница 17: ...owing 1 See to it that the components are installed according to the step by step instructions in their respective sections 2 Make sure you have set all the required jumpers before you proceed See section 1 4 for the correct jumper settings 3 Replace any expansion boards or peripherals that you removed earlier 4 Replace the system cover 5 Connect the necessary cables and turn on the system ...

Страница 18: ...specified period of time the inactivity time out the system switches to one of the power saving modes to conserve energy The Setup utility allows you to specify the inactivity time out Refer to Section 2 4 for more information on the power saving configuration The power management function does not work when the cursor is emulated by software such as Winword ETU 3 1 Chinese system DOSV Japanese sy...

Страница 19: ... 5 seconds depending on the fixed disk in use SYSTEM STANDBY MODE This is a fast on power saving mode that allows quick resume response time and at the same time lowers power consumption It is most suitable for users who want power saving features but need the PC to resume normal operation quickly Set the Standby Mode timer to a value from 2 to 120 minutes When the system enters Standby mode the t...

Страница 20: ...f On IDE HDD Status No effect Standby mode Spindle motor off Standby mode Spindle motor off Standby mode Spindle motor off CPU System Status Normal Normal Normal CPU clock stopped Entry Mode Device idle timer time out 1 15 min Device idle timer time out 1 15 min System standby timer time out 2 120 min System Suspend timer time out 2 120 min or Suspend button pushed Resume Mode Device activated Any...

Страница 21: ...under the DOS environment by including the POWER EXE commmand in the CONFIG SYS file See the MS DOS manual for more instructions on how to edit the CONFIG SYS file For more information about APM type HELP POWER EXE If you enable the Power Saving mode in Setup without installing the APM under DOS or Windows the system time and date do not display the correct settings after the system returns to nor...

Страница 22: ...ertical synchronization signals for the PC VGA monitor Its purpose is to comply with the U S Environmental Protection Agency EPA requirements Table 1 8 lists the different VESA DPMS modes and their functions Table 1 8 VESA DPMS Modes H Sync V Sync Monitor Mode Function Off Off Off No operation On Off Suspend Power saving Off On Standby Screen saving On On On Normal operation ...

Страница 23: ... Messages Software error messages are returned by your operating system or application These messages typically appear after you boot the operating system or when you run your applications If you receive this type of message consult your application or operating system manual for help 1 15 2 System Error Messages A system error message indicates a problem with the computer itself These messages no...

Страница 24: ... with Table 1 5 Equipment Configuration Error Run Setup Fixed Disk Controller Error Check and connect the cable to the fixed disk drive or controller Fixed Disk 0 Error Check all cable connections Check the fixed disk and replace if necessary Fixed Disk 1 Error Check all cable connections Check the fixed disk and replace if necessary Fixed Disk 0 Extended Type Error Run Setup Fixed Disk 1 Extended...

Страница 25: ...ur dealer Pointing Device Interface Error Contact your dealer Press F1 key to continue or Ctrl Alt Esc for Setup Press F1 or Ctrl Alt Esc Press F1 to Setup or other key to continue Press F1 and reconfigure the system Press Esc to turn off NMI any key to reboot Press Esc to disregard NMI error Press any key to reboot the system Protected Mode Test Fail Contact your dealer RAM BIOS Error Contact you...

Страница 26: ...on error messages especially for a new system 2 Remove the system cover following the directions in the system housing installation guide Check that the system board and any expansion boards are set correctly 3 If you cannot access a new disk it may be because your disk is not physically formatted Physically format the disk using the FDISK and FORMAT commands 4 Check that all connectors and boards...

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