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RIGHT. FROM THE START RIGHT. FROM THE START RIGHT. FROM THE START For Authorized RIGHT. FROM THE START Service Personnel Only: AM-990 VME Service RIGHT. FROM THE START Manual RIGHT. FROM THE START RIGHT. FROM THE START RIGHT. FROM THE START RIGHT.
1.0INTRODUCTION 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 2 AM-990 VME Computer Service Manual 2.2Opening 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.
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AM-990 VME 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-10523-00, Rev. A00...
Page 4 AM-990 VME Computer Service Manual 2.4Electronic 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.
AM-990 VME Computer Service Manual Page 5 2.5Inside 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 6 AM-990 VME Computer Service Manual 2.6Reinstalling 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.
AM-990 VME Computer Service Manual Page 7 3.0INSTALLING PERIPHERALS Mounting peripheral devices in your computer is simply a matter of attaching plastic rails to the side of the peripheral and sliding the device into its mounting position. The 6-slot chassis has mounting locations for 12 half-height (or six full-height) 5-1/4" peripherals.
Page 8 AM-990 VME Computer Service Manual Slots 3, 4, 5, and 6 are used for installing peripherals that will be accessed through the opening in the computer door. This includes devices like floppy disk drives and magnetic tape drives that use removable media.
4.0UPGRADING TO A UNIVERSAL ENCLOSURE VME COMPUTER The instructions in this section describe upgrading from an earlier 6 or 10-slot VME computer to a 10-slot AM-990 Universal Enclosure VME Computer. The upgrade kit includes a completely assembled 10-slot universal VME chassis and several different types of rear panel CPU board mounting brackets, designed to accommodate AM-180, AM-185, AM-185(-50), and AM-190 CPU boards.
Page 10 AM-990 VME Computer Service Manual Removing your peripherals from your old chassis. Installing the peripherals in the new chassis. 4.1Preparing Your Work Area Before starting the upgrade, make sure your work area has the proper anti-static safeguards. Place the new an old chassis side by side. Make sure the power switches are off, but each unit should have its AC power cord unplugged.
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AM-990 VME Computer Service Manual Page 11 CPU mounting bracket DWF-20257-02 is for AM-185(-50) CPU boards. CPU mounting bracket DWF-20257-03 is for AM-190 CPU boards. Install the appropriate bracket onto your CPU board. Once the bracket is installed, slide the CPU board into its position in the new chassis.
Page 12 AM-990 VME Computer Service Manual 4.4Removing and Installing Peripheral Devices Remove all of the 5-1/4" and 3-1/2" peripheral devices from your old chassis. Install the peripheral devices in your new chassis using the instructions in this document. 4.5Installing the I/O Rear Panel and Paddle Board Assembly You have already attached your paddle boards to the rear panel mounting bracket designed for the new chassis.
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