Acerメーカー486の使用説明書/サービス説明書
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& K DSWHU System Board System Board 1-1 This high- perform ance, 32- bit personal com puter s y stem is bas ed on the 486 series micr oprocess or. It features the single-chip upgrade technology which allows maxim um ease and flex ibility for upgr ading the system.
1-2 User’s Guide 1.1 Sy stem Board Lay out The system board has the following m ajor c omponents : • 486SX, SX2, DX 2, or DX4 series CPU • 4-MB onboard RAM expandable to 36 MB • Two 72-pin SIM.
System Board 1-3 1. Keyboard contr oller 17. Power daughter board 2. M5105 super I/O controlle r 18. M1429G system chip 3. System and VGA BIO S 19. Onboard memory (4 MB) 4. RTC Battery 20. SIMM sockets 5. Power connector 21. VGA feature connec tor 6. IDE fixed disk c onnector #2* 22.
1-4 User’s Guide 1.2 ESD Precautions Electrostatic discharge ( ESD) can dam age your processor, disk drives , expansion boards, and other com ponents. Always observe the following precautions bef ore you install a sy stem com ponent. 1. Do not remove a com ponent f rom its protective pac kaging until y ou are ready to install it.
System Board 1-5 Do not attempt the procedures described in the following sections unles s y ou are a qualified servic e technician. 1.4 Jumper Settings Figure 1-2 shows the j umper locations.
1-6 User’s Guide The f ollowing tables list the jum per settings and their c orreponding functions . Table 1-1 System Board J umpers Jumper Setting Function JP2 1-2 2-3 Enable password check Bypass .
System Board 1-7 Table 1-3 CPU Type Selection 486 1 486 WB 2 Pentiu m OverDrive AMD 486/DX2 AM D 486/DX4 Cyrix IBM TI JP11 1-2 1-2 1-2 1-2 1-2 2-3 2-3 JP12 1-2 2-3 2-3 1-2 1-2 1-2 2-3 JP13 1-2 1-2 1-2.
1-8 User’s Guide 1.5 Installing Memory The system board has two 72-pin SIMM sock ets that accept 1-MB, 2- MB, 4-MB, 8-MB, or 16-MB mem ory modules with 80 ns (or less) DRAM speed. The m axim um system m em ory size is 36 MB. W hen installing additional m emor y , choose one of the SIMM configur ations listed in T able 1-5.
System Board 1-9 1.5.1 Installing a SIMM Observ e ESD precautions when installing SIMMs. See section 1.2. Follow these steps to install a SIMM: 1. Insert the SIMM into the soc k et at a slight angle, m ak ing sur e that the cut edge of the SIMM touc hes the base of the circle m ark on the SIMM sock et.
1-10 User’s Guide 1.5.2 Removing a SIM M Observ e ESD precautions when removing SIMMs. See section 1.2. 1. Press the holding clips on both s ides of the SIMM outward to release it. 2. Push the SIMM upward. 3. Gently pull the SIMM out of the sock et.
System Board 1-11 1.6 Upgradi ng the CPU Conventional technology places the CPU on the sam e board as the ISA bus logic, sy s tem mem ory and I/O interfac e.
1-12 User’s Guide 4. Insert the upgrade CPU (with the heatsink ) into the upgrade sock et. Mak e sur e that pin 1 of the CPU c orr esponds to hole 1 of the upgrade socket (see Figure 1-6). T he flat corner on the CPU indicates pin 1. Inser t the CPU pins into the s ock et pinholes gently but firm ly.
System Board 1-13 1.7 Pow er Daughter Boar d The power daughter board enables the system to suppor t a 3.3V mic roprocess or. W ithout this board, your sy stem can only support a 5V CPU. Follow these steps to install the power daughter board: Before installing, you mus t chec k firs t the voltage requirement of y our upgrade CPU.
1-14 User’s Guide 1.8 Upgradi ng VGA Memory Observ e ESD precautions when installing components. See sec tion 1.2. The VGA m em ory is upgradable to 1 or 2 MB depending on your onboard VGA chip. T he system board m ay come with either a GD- 5424 or a GD-5429 VG A chip.
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 .
1-16 User’s Guide 1.9 Upgradi ng Cache M emory To ins tall cache c hips, do the following: 1. Locate the cache s ock ets on the system board. See Figur e 1-1. 2. Align the cut edge of the chip with the cut edge of the cache sock ets. See Figure 1-8.
System Board 1-17 The SRAM must have an acces s speed of 15 nanoseconds. Make sure that you set the jumpers proper ly. See section 1.4. 1.10 Post-installation Instructions Alway s observe the f ollowing: 1. See to it that the components are installed according to the step- by -step instructions in their respec tive sections .
1-18 User’s Guide 1.11 Pow er-M anagement Feature The m ainboard incor porates the lates t power-c ons ervation tec hnology. However, to take advantage of its energy-saving capabilities , the mainboar d mus t have an Intel SL-Enhanced or a power-s aving CPU.
System Board 1-19 Set the independent power-m anagement tim ers for the VESA DPMS monitor . Valid values are from 1 to 15 m inutes. Any video or I/O action returns the system to full power. IDE F I XED DI SK STANDBY MODE The IDE Fixed Disk Standby Mode offers a quic k-r esum e power- saving mode for ATA-c om pliant IDE fixed disk s.
1-20 User’s Guide Set the Suspend Mode timer to a value f rom 2 to 120 minutes , or activate the Suspend/Resum e button. In Suspend m ode, the turbo LED light on the front panel blinks at a rate slower than when the system is in the Standby m ode. Activating the Sus pend/Resum e button produces two beeps as the system enter s the suspend mode.
System Board 1-21 1.12 Ad vanced Power M anagement (A PM) This system f eatures the APM s tandard designed to f urther reduce system power consum ption.
1-22 User’s Guide 1.14 VESA DPMS The Video Electronics Standard Association (VESA) proposed the Display Power-Management Signaling (DPMS) standard com binations of horizontal and vertical s ynchronization signals for the PC-VGA monitor . Its purpose is to com ply wi th the U.
System Board 1-23 1.15 Error M essages In the event that y ou receive an err or message, do not continue using the com puter. Note the m essage and tak e cor rective action at once. This s ection desc ribes the diff erent types of err or m essages and suggests c orrective m easur es.
1-24 User’s Guide Table 1-9 System Err or Messages Error Message Corrective A ction Bad CMO S Battery Replace battery . Contact your dealer. CM OS Checksum Error Run Setup. Diskette Dri ve Controller Error Check and connect the cable to the diskette drive or controller.
System Board 1-25 Table 1-9 System Err or Messages (c ontinued) Error Message Corrective Action Memory Error Check SIMM s on the system board. Contact your dealer. Memory Siz e Mismatch Run Setup. Serial 1 Conflict Run Setup. Disable onboard serial 1.
1-26 User’s Guide 1.15.3 Correcting Error Conditions As a general rule, the "Press F1 to continue" er ror m essage is c aused by a configur ation problem which can be eas ily corrected. An equipment m alf unction is m ore lik ely to cause a f atal err or, i.
デバイスAcer 486の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Acer 486をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはAcer 486の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Acer 486の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Acer 486で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Acer 486を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はAcer 486の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Acer 486に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちAcer 486デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
