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Alpha Microsystems AM-990 Service Manual

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RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
RIGHT. FROM THE START
For Authorized
Service Personnel Only:
Service Manual
AM-990 SBC
DSS-10524-00, Rev. A01

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Summary of Contents for Alpha Microsystems AM-990

  • Page 1 RIGHT. FROM THE START RIGHT. FROM THE START RIGHT. FROM THE START For Authorized RIGHT. FROM THE START Service Personnel Only: AM-990 SBC RIGHT. FROM THE START Service Manual RIGHT. FROM THE START RIGHT. FROM THE START RIGHT. FROM THE START RIGHT.
  • Page 2 Use of another battery may present a risk of fire or explosion. Replacement batteries may be ordered from your authorized Alpha Micro reseller. For AM-3500-E550, and AM-990-04 systems, replace batteries with Panasonic or Ray-O-Vac BR1225 only. Use of another battery may present a risk of fire or explosion. Replacement batteries may be ordered from your authorized Alpha Micro reseller.

  • Page 3: Table Of Contents

    AM-990 SBC Computer Service Manual Page i TABLE OF CONTENTS INTRODUCTION ........... . .

  • Page 4: Introduction

    INTRODUCTION This document contains instructions which are intended only for authorized service personnel. The AM-990 computer contains a high-output power supply, which produces current levels high enough to make it unsafe for unauthorized persons to perform work inside the chassis.

  • Page 5: Opening The Top Cover

    Page 2 AM-990 SBC Computer Service Manual Opening the Top Cover In order to remove the side panel, you must first remove the computer’s top cover. The procedure for removing the top cover is as follows: 1.Swing the front door open to expose the screws that hold the top cover in place.
  • Page 6 AM-990 SBC Computer Service Manual Page 3 LOCKING TABS MAC4 4 2 TO REMOVE THE TOP COVER, REMOVE THESE TWO SCREWS. TO REMOVE THE SIDE PANEL, REMOVE THESE FOUR SCREWS. Removable Top Cover and Side Panel DSS-10524-00, Rev. A01...

  • Page 7: Electronic Equipment Handling Precautions

    Page 4 AM-990 SBC Computer Service Manual Electronic Equipment Handling Precautions With the AC power cord unplugged and the sheet metal removed, the components inside your computer are vulnerable to damage caused by static discharge. Your body and clothing are capable of storing an electrical charge that can damage or destroy unprotected electronic components.

  • Page 8: Inside Your Computer

    AM-990 SBC Computer Service Manual Page 5 Inside Your Computer Once you have removed the side panel, you will be able to gain access to the equipment inside your computer. The illustration below shows the location of the basic components that make up your computer:...

  • Page 9: Reinstalling The Top Cover And Side Panel

    Page 6 AM-990 SBC Computer Service Manual Reinstalling the Top Cover and Side Panel If you removed the top cover and side panel as described in the two previous sections, you probably noticed the panels are a snug fit. The snug fit helps the computer meet FCC requirements.

  • Page 10: Installing Peripherals

    The AM-990 chassis has mounting locations for 12 half-height (or six full-height) 5-1/4" peripherals. The front door on the AM-990 chassis has a cutout which allows access to peripheral devices using removable media. This cutout will accommodate up to four 5-1/4"...

  • Page 11: Plastic Mounting Rails

    Page 8 AM-990 SBC Computer Service Manual The first hard disk drive is mounted in slot 12, or slots 11 and 12 if it is a full-height device. A second hard disk drive would be mounted in the next available slot above the first disk drive.

  • Page 12: Additional Documentation

    AM-990 SBC Computer Service Manual Page 9 DWF-20652-00 MOUNTING RAIL HALF-HIGH 5-1/4" PERIPHERAL MAC4 7 1 Attaching Mounting Rails to Peripheral Additional Documentation Each peripheral device sold by Alpha Micro is covered by its own set of installation instructions. The installation instructions include information on jumper settings, termination, and cabling.

  • Page 13: Sbc Am-140 Cpu Board

    Page 10 AM-990 SBC Computer Service Manual SBC AM-140 CPU BOARD The AM-140 is a 50Mhz main logic board available for the SBC. Most of the AM-140 specifications are covered in Appendix A (in the SBC owner’s manual); however, the following list highlights some of the key features on the AM-140 board: Memory expansion up to 64 megabytes.

  • Page 14: Sbc Expansion I/O

    AM-990 SBC Computer Service Manual Page 11 If you are going to mix 4MB and 16MB memory boards in your SBC, make sure you install the 16MB boards first followed by the 4MB memory boards. SBC Expansion I/O There are two 60-pin connectors on the SBC CPU board, each capable of supporting 32 serial ports.
  • Page 15 Page 12 AM-990 SBC Computer Service Manual PARITY STATUS FRONT PANEL DISPLAY 60-PIN ESDI CONNECTOR MEMORY EXPANSION U144 FLOATING POINT CO-PROCESSOR SOCKET U131 U130 BOOT PROMS 36-PIN FLOPPY 50-PIN SCSI CONNECTOR CONNECTOR POWER CONNECTOR REMOTE RESET JUMPER IN = ENABLED...

  • Page 16: Sbc Am-145 Cpu Board

    AM-990 SBC Computer Service Manual Page 13 SBC AM-145 CPU BOARD The AM-145 is a 33Mhz main logic board available for the SBC. Most of the AM-145 specifications are covered in Appendix A in the owner’s manual; however, the following list highlights some of the key features on the AM-145 board: Memory expansion up to 16 megabytes.

  • Page 17: Sbc Expansion I/O

    Page 14 AM-990 SBC Computer Service Manual If your computer includes an AM-522 ESDI controller board, the maximum memory capacity is reduced to 12 megabytes. The AM-522 board requires one of the memory expansion slots for installation. SBC Expansion I/O The AM-145 board has one 60-pin connector, located at J9, designed to support a maximum of 32 serial ports.
  • Page 18 AM-990 SBC Computer Service Manual Page 15 REMOTE RESET JUMPER IN = ENABLED FRONT PANEL JUMPER OUT = DISABLED DISPLAY On B. Revison artwork and earlier W100 is hard-wired. MEMORY EXPANSION W100 FLOATING POINT 50-PIN SCSI CO-PROCESSOR CONNECTOR SOCKET SSD SOCKET...

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