Alpha Microsystems | Eagle 250 | Service manual | Alpha Microsystems Eagle 250 Service manual

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For Authorized
Service Personnel Only:
Eagle 250
Service Manual
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DSM-00223-01
FIRST EDITION: July 2000
-01 Version - January 2001
To re-order this document, request part number DSO-00223-00
FCC Notice
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own
expense.
Canadian Department of Communications Compliance Statement
This equipment does not exceed Class A limits per radio noise emissions for digital apparatus set out in the Radio Interference
Regulations of the Canadian Department of Communications. Operation in a residential area may cause unacceptable interference to
radio and TV reception requiring the owner or operator to take whatever steps are necessary to correct the interference.
Avis de Conformité aux Normes du Ministère des Communications du Canada
Cet équipment ne deapsse pas les limits de Classe A d'émission de bruits radioélectriques pour les appareils numeriques tels que
prescrites par le Règlement sur le brouillage radioélectrique établi par le ministère des Communications du Canada. L'exploitation faite
en milleu résidential peut entrainer le brouillage des réceptions radio et tele, ce qui obligerait le propriétaire ou l'opératour à pendre les
dispositions nécessaires pour en éliminer les causes.
Battery Warning
CAUTION: Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the
manufacturer. Discard used batteries according to the manufacturer's instructions.
ATTENTION: Il y a danger d'explosion s'il y a replacement incorrect de la batterie. Remplacer uniquement avec une batterie du même
type ou d'un type recommandé par le constructeur. Mettre au rébut les batteries usagées conformément aux instructions du fabricant.
For AM-3500-E100, -E200, -E300, -E400, -E500 and AM-990-01 systems replace battery with Panasonic or Ray-O-Vac BR2325 only.
For AM-3500-E250, AM-3500-E450, E550, AM-3500-6000, AM-3500-7000, and AM-990-04 systems, replace batteries with Panasonic
or Ray-O-Vac BR1225 only. Use of other batteries may present a risk of fire or explosion. Replacement batteries may be ordered from
your authorized Alpha Micro reseller.
Safety Warning
This computer contains no user-configurable components that require opening the computer case. Because the power supply in this
computer is capable of outputting high current levels hazardous to your safety, the computer case should only be opened by an
authorized service technician.
Cet ordinateur ne contient aucune pièce configurable par l’utilisateur qui nécessite l’ouverture du boitier. L’alimentation de cet
ordinateur peut preduire des nivaeux de tensions dangereux, le boitier ne devrait donc être ouvert que par un technician autoriaé.
SOFTWARE SECURITY DEVICE IDENTIFICATION NUMBER: _________________
The Alpha Micro Software Security Device (SSD) is a customized integrated circuit that personalizes the computer, providing identity
verification for it. Certain Alpha Micro and non-Alpha Micro software may require that your computer contain an SSD in order to run
software that has been customized to run only on your computer.
Please enter the identification of your SSD above. The SSD identification number should be on your computer ID label under "SSD
Serial No." (Another way of finding the number is to look at the SSD itself. The SSD is located in an integrated circuit location on the
CPU board; its identification number is printed on the SSD itself.) Software vendors may ask you for the SSD number if they are
customizing software to run only on your computer.
This document may contain references to products covered under the following U.S. Patent Number(s): 4,530,048
ALPHA MICROSYSTEMS
2722 S. Fairview Street
Santa Ana, CA 92704
Table of Contents
INTRODUCTION............................................................................................................................... 1
OTHER EAGLE 250 DOCUMENTS.................................................................................................. 1
ACCESSING YOUR COMPUTER..................................................................................................... 1
ELECTRONIC EQUIPMENT HANDLING PRECAUTIONS ............................................................ 3
HARDWARE CONFIGURABLE OPTIONS ...................................................................................... 3
Printed Circuit Board Configuration ................................................................................................. 4
AM-138 Board Jumpers ................................................................................................................... 6
AM-138 Board Connectors .............................................................................................................. 7
Remote Reset Capability .................................................................................................................. 8
Replacing the Time and Date Battery................................................................................................ 8
SSD and PROM Chip Removal........................................................................................................ 9
AM-966-10 CONNECTIONS ........................................................................................................... 10
Front Panel Display Wires for Upgrades......................................................................................... 11
UPGRADING EAGLE 250 ON-BOARD MEMORY ........................................................................ 11
Removing Memory SIMMs ............................................................................................................ 12
Installing Memory.......................................................................................................................... 12
INSTALLING I/O BOARDS (FULL EAGLE 250 CONFIGURATION ONLY)................................ 14
PERIPHERAL MOUNTING............................................................................................................. 15
Additional Documentation .............................................................................................................. 17
Table of Figures
Figure 1: Chassis Top Cover Screws.................................................................................................... 2
Figure 2: Chassis Top Cover Removal................................................................................................. 2
Figure 3: Static Protection Wrist Strap................................................................................................. 3
Figure 4: AM-138-10 Board ................................................................................................................ 5
Figure 5: AM-138-10 Backup Battery Removalta ................................................................................ 9
Figure 6: SSD Chip Removal Tools................................................................................................... 10
Figure 7: AM-966-10 Board Layout .................................................................................................. 10
Figure 8: AM-138-10 SIMM Module Installation .............................................................................. 13
Figure 9: JP7 Memory Jumpers ......................................................................................................... 13
Figure 10: Peripheral Bay Positions................................................................................................... 16
Rev. 01
Eagle 250 Service Manual
Page 1
INTRODUCTION
The instructions in this document are intended only for authorized service personnel. Eagle 250
computers contain a high-output power supply, which produces current levels high enough to
make it unsafe for unauthorized persons to perform work inside the chassis.
This document describes the following procedures and topics for the Eagle 250 computer:
• Removing your computer's cover and electronic equipment handling precautions
• Hardware configuration options: jumpers and connectors on the AM-138 board, replacing the
time/date battery, enabling remote reset, and replacing the SSD and PROM chips
• Connections to the AM-966-10 front panel display
• Installing memory
• Installing I/O boards (Eagle 250 full configuration only)
• Peripheral installation
OTHER EAGLE 250 DOCUMENTS
Besides this Service Manual, these other documents contain information on the Eagle 250:
• Eagle 250 Owner’s Manual, DSO-00221-00: the end user’s guide to daily operation and
maintenance of the computer.
• Eagle 250 Installation and Technical Manual, DSO-00222-00: technical specifications,
configuration guidelines, and installation and software setup information. You should not begin
any Eagle 250 component replacement or upgrade without this manual.
• Upgrade Instructions: Eagle 100/200/300 to Eagle 250, PDI-00138-15: detailed instructions for
upgrading any of these computers with the AM-138 board to create an Eagle 250 computer.
All of these manuals are available on-line at our Web site, www.amos-online.com.
ACCESSING YOUR COMPUTER
When adding additional equipment or servicing your computer, you will need to remove your computer's
top cover. The top cover is held in place with four Phillips-head screws on the computer's rear panel. To
remove the top cover, remove all four screws from the locations indicated in Figure 1. Once the screws
have been removed, you can slide back and remove the top cover, as shown in Figure 2. (Your
computer’s front panel may not look like the one in Figure 2—the cover removal procedure is still the
same.)
Rev. 01
Page 2
Eagle 250 Service Manual
TOP COVER SCREWS
0
SCSI
115
6
7
4
5
2
3
0
1
Figure 1: Chassis Top Cover Screws
Figure 2: Chassis Top Cover Removal
Rev. 01
Eagle 250 Service Manual
Page 3
ELECTRONIC EQUIPMENT HANDLING PRECAUTIONS
With the AC power cord unplugged and the top cover removed, the components inside your computer are
vulnerable to damage caused by static discharge. Your body and clothing can store an electrical charge
that can damage or destroy unprotected electronic components. Before handling any computer hardware,
make sure your work area is properly protected against static discharge. There are a number of
commercially available static protection devices, like the wrist strap shown in Figure 3, designed
specifically to protect your equipment from harmful static discharge.
Figure 3: Static Protection Wrist Strap
HARDWARE CONFIGURABLE OPTIONS
The following sections show the jumpers and connectors on the AM-138 board, then describe the
configuration options available to let you tailor your hardware to your needs. These options require
access to the main circuit boards inside the computer, and should be performed only by qualified
technical personnel. Contact your VAR if you need assistance.
Rev. 01
Page 4
Eagle 250 Service Manual
Printed Circuit Board Configuration
The AM-138 board is shown in Figure 4. Your board has been factory tested and shipped with its
configuration jumpers set in their standard default positions. There are only two areas on the board which
may require you to change jumper settings:
• Memory size select (JP7)
• Enabling or disabling the supply of SCSI bus termination voltage (JP5)—default set at enabled.
All other jumpers should be left in their factory-installed positions. The jumper setting table following
Figure 4 will help you check the board to make sure all jumpers are properly installed.
Rev. 01
Eagle 250 Service Manual
Page 5
Remote reset
jumper (JP1)
On-board
serial ports
Batteries go
here.
(full Eagle
250 only)
Wide SCSI
connector
Narrow SCSI
connector
Serial I/O
expansion slots
(Eagle 250 full
configuration
only)
Memory jumpers
P8: Remote
reset adapter
attaches here
First memory SIMM
Second memory SIMM
Figure 4: AM-138 Board
Rev. 01
Page 6
Eagle 250 Service Manual
AM-138 Board Jumpers
Jumper
Number
JP1
Jumper Name
RR-EN
Default
Setting
out
JP2
Level7 Select
UPS
JP3
20
16
TERMPWR
IN
out
EN
DISC
Memory Size
Select
32
16
25
20
33
33
50
66
SP
IN
See Table 4.
JP5
JP6
JP7
JP8
JP9
out
out
out
out
IN
out
out
IN
out
Notes
When IN, enables remote reset through serial
port 0 (this is not supported through AM-90
card); when out, allows remote reset cable
attachment at P8. See page 8.
3-pin jumper; set to two pins at UPS side. When
set to FP, front panel Turbo switch enables
Level7 diagnostic. Not user configurable.
Ethernet bus clock select. Not user configurable.
SCSI bus termination voltage,
EN = Enabled, DS = Disabled. User may change.
Not user configurable
Memory size configuration. Installer must
configure.
Not user configurable.
Not user configurable.
Table 1: Jumper Configuration for the AM-138 Board
Rev. 01
Eagle 250 Service Manual
Page 7
AM-138 Board Connectors
The following table provides a brief overview of the connectors on the AM-138 board.
Connector
Number
Connector
Name
Connector
Type
J1
J2
J4
J7
J8
J9
J10
J11
J13
UPS
Parallel port
Ethernet
Ports 10-17
Ports 20-27
Ports 30-37
Bank 0
Bank 1
SCSI-2 Wide
9-pin
25-pin
TPI
42-pin
42-pin
42-pin
SIMM
SIMM
68-pin
P1
P2
P3
P4
P5
40-pin
40-pin
Molex
Molex
P6
P7
Ports 0 - 3
Ports 4 - 7
Power
Power
Option
Connector
Program
SCSI-2
P8
Run
Disk
2-pin
2-pin
Power
2-pin
Reset
2-pin
26-pin
20-pin
P9
P10
50-pin
Cable Description and How to Use
Cable pin-1 up, use keyed cable
Cable pin-1 up, use keyed cable
RJ-45. Cannot use both this and J3.
Serial expansion (full Eagle 250 only)
Serial expansion (full Eagle 250 only)
Serial expansion (full Eagle 250 only)
First memory SIMM
Second memory SIMM
Cable pin-1 down, use keyed cable. Cannot use
both this and P7.
First four on-board ports
Second four on-board ports (full Eagle 250 only)
For +5V, +12V, -12V and GND
For +5V and GND
FOR FUTURE USE
FOR FACTORY USE ONLY
Cable pin-1 down, use keyed cable. Cannot use
both this and J13.
Run light if using 20-pin front panel display at P10
Disk activity light if using 20-pin front panel
display at P10
Power light if using 20-pin front panel display at
P10
Optionally, connect PDB-10323-00 to inner pin.
Front panel status display (AM-966-10)
Front panel status
Table 2: AM-138 Connectors
Rev. 01
Page 8
Eagle 250 Service Manual
Remote Reset Capability
The AM-138 board has an option to enable remote hardware reset, either through serial port 0, or by
using the Remote Reset Adapter, PDB-10323-00.
You cannot use remote reset through port 0 if port 0 uses an AM-90 card for its back panel
connection; the AM-90 does not support this feature. If you use an AM-90, which is optional on
newly-purchased Eagle 250s and recommended for upgrades, you must use the Remote Reset
Adapter if you want remote reset ability.
To enable remote reset through serial port 0, you must do two things:
1. Install the JP1 jumper. The factory default is not installed.
2. Connect a push-button switch between pin-1 and pin-7 (signal ground) at the terminal end of the
terminal cable attached to serial port 0.
Once you’ve enabled remote reset, you can reset the computer by activating the push-button switch.
The remote reset adapter allows you to reboot the computer from anywhere in your facility by wiring an
external switch to the location you want. To install the remote reset adapter, follow the instructions in
PDI-10323-00. The JP1 jumper must not be installed. Attach the adapter’s single-wire connector to the
connector labeled RESET at location P8. Attach it to the pin away from the edge of the board.
Replacing the Time and Date Battery
When replacing the backup batteries, always be sure to power-down the system first! DO NOT
replace the batteries with the power on! As always when opening your computer chassis, take
proper precautions against electrostatic discharge, which can seriously damage system
components.
The AM-138 board uses two 3-volt lithium batteries (BR-1225) to provide power to its time/date circuit.
The batteries are no bigger than a dime (1.2 cm), and are secured side-by-side in a plastic holder at
location U17, as shown in Figure 5.
The batteries need to be replaced when the status panel displays B1 or B0. You must replace both
batteries at the same time. For battery replacement, please follow these steps:
Before turning off your computer, write down the current CMOS settings. Removing the batteries
will erase all CMOS data.
1. Insert a knife with a thin blade (such as a small scribe or Xacto™ knife) from the top, down
through the square hole between the right edge of the battery and the plastic holder's top piece.
(The right side is the side toward C31.)
2. Gently pry the right side of the battery so it slides to the left and pushes against the left side
spring contacts.
3. As you slide the battery to the left and it clears the plastic top hole, pry the right edge of the
battery upward and out through the hole in the top. The battery will typically "pop" up and out.
Rev. 01
Eagle 250 Service Manual
U17
U17
+
C31
C31
+
Page 9
+
+
Figure 5: AM-138 Backup Battery Removal
4. Inspect the battery contacts and be sure they are clean before installing the new batteries. Use
alcohol and a cotton swab to clean them, if necessary.
5. To install a new battery, insert the edge of the battery down through the square hole and under
the left side of the plastic top. Be sure to install the new batteries with the (+) positive side up.
6. Use your finger to slide the battery to the left and down, until the right edge of the battery slips
under the right side of the plastic top. Release the battery and it should spring to the right,
securing itself under the holder's top piece.
Restoring Your CMOS Settings
The AM-138’s batteries also maintain the boot routine data stored in its CMOS chip. Therefore, when
you replace the batteries, your CMOS settings will be lost. After you install the new batteries and turn
system power on, you need to access the CMOS Configuration menu and restore your settings. Refer to
the Eagle 250 Installation and Technical Manual for detailed instructions.
If you do not use the CMOS configuration menu to restore your settings, the system will drop into a
standard default boot routine: it will look first for a warm-boot streamer tape on SCSI device ID 3, then
for AMOS32.MON and AMOS32.INI on SCSI disk drive 0.
Once the system is up and running, log to OPR: and enter the current time and date. Reboot the system to
initialize the system up time.
SSD and PROM Chip Removal
The type of socket used for the boot PROM and SSD chips in your Eagle 250 requires a special tool for
chip removal. If you ever need to remove and replace either of these chips, be sure to use the correct tool,
as shown in Figure 6.
Rev. 01
Page 10
Eagle 250 Service Manual
WARNING!
The SSD chip and boot
PROM on the AM-138
board require a
specialized tool for
their removal. If you
attempt to remove
the SSD chip or
boot PROM using
a screwdriver or
pocketknife, you
could easily damage
both the chip and the
socket. This type of chip
extraction tool is available
at retail stores specializing
in electronic components.
Figure 6: SSD Chip Removal Tools
AM-966-10 CONNECTIONS
The Eagle 250 uses the AM-966-10 front panel display board, which connects to the AM-138. In most
cases, you should not need to connect any wires to or disconnect any wires from the AM-966. However,
if any of your front panel display lights stop working, or if one or more wires come loose from the AM966, you can refer to the picture and list below to check and, if necessary, remake any connections.
CABLE FROM AM-138
CONNECTOR P9
PLUGS IN HERE
PIN 1
JP2
DWB0966-10 Rev xxx
RESET
U2
EN26
TURBO SW
TURBO RUN
JP5
DISK
J2
JP3
EN20 U3
JP4
SPKR/PWR
JP1
J1
JP6
THIS JUMPER MUST
BE IN THE TOP POSITION
Figure 7: AM-966-10 Board Layout
Rev. 01
Eagle 250 Service Manual
Page 11
The AM-966-10 board uses the following connections and jumpers:
Location
J1
JP1
JP2
JP3
JP4
JP5
JP6
Description
26-pin cable to AM-138. Notice pin 1
orientation on Figure 7.
Connects to Turbo switch.
Connects to Reset switch.
In an Eagle 250, this jumper must be on the
upper two pins (those closest to J1).
To speaker and front panel power.
Connects to system activity (Turbo) light.
Place connector on left two pins (white goes
on center pin).
Connects to disk activity (H.D.D.) light.
Place connector on left two pins (white goes
on center pin).
Wire Order*
Black-yellow-white
Green-black or black-green
Red-black
Yellow-white
Red-white
Table 3: AM-966-10 Connectors
*
Wires should be in this order, from top to bottom or left to right, depending on jumper
orientation. In some cases, wires may be reversed; if connection doesn’t work in this orientation,
try reversing the connector.
If all front panel lights stop working, check the JP4 connection first. If it is loose, none of the
lights will work.
Front Panel Display Wires for Upgrades
Computers which were upgraded to an Eagle 250 from older Eagle computers may not use the AM-96610. If not, the 20-pin connector from the front panel attaches at P10, and additional front panel wires
attach at P8 as indicated:
Board Label
Run
Wires
Yellow/White
Disk
Power
Reset
Red/White
Green/White
Green/Black
Purpose/Notes
Run light; white wire goes toward edge of
board.*
Disk activity light; white wire toward edge.*
Power light; white wire toward edge*
Reset switch
UPGRADING EAGLE 250 ON-BOARD MEMORY
The AM-138 has two on-board SIMM (single inline memory module) expansion slots, which support
60ns DRAMs; you can install either one or two memory SIMMs. Because the memory is located onboard, it can be accessed much faster than memory accessed over the VME bus—i.e., AM-730 and AM740 memory boards used with earlier CPU boards.
Rev. 01
Page 12
Eagle 250 Service Manual
The following procedures describe how to remove and install the memory SIMMs, and set the memory
size jumpers.
Removing Memory SIMMs
To remove a memory SIMM from its connector:
1. Power down the computer. Remove the chassis cover and access the AM-138 board.
2. Press out on the metal retainer clips and gently tilt the top of the SIMM module, so it is free of
the metal retainer clips.
3. Lift the SIMM out of the connector
Installing Memory
The Eagle 250 supports from 4MB to 256MB of main memory: either one or two memory SIMMs of
4MB, 8MB, 16MB, 32MB, 64MB, or 128MB. Use 60ns SIMMs only; 70ns SIMMs will not work.
SIMMs do not have to be installed in pairs: you can use either one or two SIMMs; if you use two, they
do not have to be of equal size. For example, you can install one 32MB SIMM and one 16MB SIMM for
a total of 48MB of memory.
The memory SIMMs install in connectors J10 and J11. See Figure 4 for the location of these connectors.
If you’re installing only one SIMM, it goes in J10. If you’re installing two SIMMs of unequal capacity,
the larger one goes in J10.
To install memory expansion SIMMs on the AM-138 board, use this procedure:
1. Insert one SIMM (the larger if the SIMMs aren’t of equal capacity) in connector J10. Align pin-1
at the notched end of the SIMM module with pin-1 on the connector, as in Figure 8.
2. Insert the SIMM module into the connector at a slight angle.
Rotate into the upright position.
The SIMM will engage the metal retainer clips and click into position, locking the SIMM in
place.
3. If you are using two SIMMs, repeat steps 1 and 2 for the second one, at connector J11.
Rev. 01
Eagle 250 Service Manual
Page 13
MAKE SURE THIS CURVE
IN THE SIMM CARD ALIGNS
WITH PIN-1 IN THE SIMM
CONNECTOR.
SIMM (SINGLE INLINE
MEMORY MODULE)
RETAINER
CLIP
RETAINER
CLIP
SIMM
CONNECTOR
PIN-1 INDICATOR
Figure 8: AM-138 SIMM Module Installation
Setting Memory Jumpers
1
2
4
1
2
4
BANK1
BANK0
JP7
After installing the SIMMs, set the jumpers at location JP7 on the AM-138 board according to the table
below. As you turn on the computer, AMOS will automatically make the memory available. See Figure 4
for the location of the JP7 jumpers.
Figure 9: JP7 Memory Jumpers
The Bank 0 jumpers apply to the SIMM in J10; the Bank1 jumpers apply to the SIMM, if any, in JP11.
The correct jumper settings for each possible memory combination are shown in Table 4, below.
Rev. 01
Page 14
Eagle 250 Service Manual
Memory Module Size
Combinations:
4MB
2 x 4MB
8 MB
8MB + 4MB
2 x 8MB
16MB
16MB + 4MB
16MB + 8MB
2 x 16MB
32MB
32MB + 4MB
32MB + 8MB
32MB + 16MB
2 x 32MB
64MB
64MB + 4MB
64MB + 8MB
64MB + 16MB
64MB + 32MB
2 x 64MB
128MB
128MB + 4MB
128MB + 8MB
128MB + 16MB
128MB + 32MB
128MB + 64MB
2 x 128MB
Total
Memory
4MB
8MB
8 MB
12MB
16MB
16MB
20MB
24MB
32MB
32MB
36MB
40MB
48MB
64MB
64MB
68MB
72MB
80MB
96MB
128MB
128MB
132MB
136MB
144MB
160MB
192MB
256MB
Bank0
Settings
1
2
4
X X X
X X X
O X X
O X X
O X X
X O X
X O X
X O X
X O X
O O X
O O X
O O X
O O X
O O X
X X O
X X O
X X O
X X O
X X O
X X O
O X O
O X O
O X O
O X O
O X O
O X O
O X O
Bank1
Settings
1
2
4
O
O
O
X
X
X
O
O
O
X
X
X
O
X
X
O
O
O
X
X
X
O
X
X
X
O
X
O
O
O
X
X
X
O
X
X
X
O
X
O
O
X
O
O
O
X
X
X
O
X
X
X
O
X
O
O
X
X
X
O
O
O
O
X
X
X
O
X
X
X
O
X
O
O
X
X
X
O
O
X
O
X = Jumper installed; O = Jumper not installed
Table 4: AM-138 Memory Module Jumper (JP7) Settings
INSTALLING I/O BOARDS (FULL EAGLE 250 CONFIGURATION ONLY)
I/O boards containing additional serial ports plug into the connectors at J7, J8, and J9 on the AM-138. As
discussed in the Eagle 250 Installation and Technical Manual, you should add boards starting with J7
and working up to J9. For detailed installation instructions for any serial I/O board, please refer to the
Rev. 01
Eagle 250 Service Manual
Page 15
documentation accompanying the board. This section merely contains some cautions and issues to keep
in mind when adding a serial I/O board to an Eagle 250 computer.
The plastic connectors on the AM-138 are fragile, and can break if you are not careful when removing or
installing I/O boards. To minimize the chance of damage:
• Never apply excessive pressure or attempt to force a board into the connector. If aligned
properly, the board should install easily.
• Attach the cable that will go from the I/O board to the back panel before you insert the board into
the connector on the AM-138. Attaching the cable after the board is installed puts a sideways
pressure on the connector and could crack it.
• Similarly, do not unplug the cable to the back panel while the board is in the connector. Carefully
remove the board from the connector, then unplug the cable.
Most Eagle 250s include a small brace designed to support the I/O boards and prevent damage during
shipping. You can adjust this brace for the number of I/O boards currently in the computer. We
recommend you leave the brace in place to help prevent possible damage if the computer is jostled or
moved. See PDI-20791-00, Notice: Shipping Brace for I/O SIMM Boards, for instructions on removing
and adjusting the brace.
PERIPHERAL MOUNTING
Your Eagle 250 computer can hold six half-height peripherals, in three 3.5” and three 5.25” mounting
bays. One of the 3.5” bays and all of the 5.25” bays are accessible through the computer’s front panel
after you remove the appropriate filler panels.
3.5" hard disk drives can be mounted in the 5.25" bays using special mounting brackets. The 3.5”
SCSI floppy drive requires a 5.25” mounting bay.
Figure 10 shows all six peripheral mounting positions.
We strongly recommend turning off system power before attaching or detaching any SCSI
peripheral. Attaching any device, internal or external, while there may be activity on the bus can
severely damage the peripheral or the SCSI controller.
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Eagle 250 Service Manual
1
5.25” mounting bays;
all are accessible
from front panel
2
3
4
Used for front panel display
3.5” mounting bays;
only #4 is accessible
from front panel
5
6
NOTE:
With the proper adapter, you can mount a
3.5" device in a 5.25” drive bay.
Figure 10: Peripheral Bay Positions
The following paragraphs give general instructions for mounting peripherals in the Eagle 250 cabinet.
For detailed instructions on configuring a particular device, see the installation instructions shipped with
that device.
A peripheral is installed in a drive bay using four Phillips-head screws. To install the screws, you need
access to both sides of the drive bay. On one side of the cabinet, all six of the bays are easily accessible.
However, on the other side, the AM-138 mounting panel blocks access to all but the top two bays. To
ease the installation process, Alpha Micro installs peripherals starting at the top and working down. If
your computer includes one disk drive and one tape drive, the two peripherals will be in bays 1 and 2,
which are easily accessible from both sides of the chassis.
To install peripherals in bays 3 through 6, you need to remove the mounting panel from the right side of
the chassis (looking from the front). To install peripherals in these locations:
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1. Since the AM-138 is attached to the panel, you need to detach it from the computer’s back panel
before removing the mounting panel. Remove the screws near the UPS status port and parallel
port on the back panel.
2. Remove the two Phillips-head screws attaching the mounting panel to the chassis.
Notice how the panel is positioned over the two alignment tabs on the bottom of the chassis.
When you reinstall the panel, you must make sure it is properly positioned over both tabs; if not,
you won’t be able to reinstall the two screws.
3. Move the panel forward slightly so the AM-138 connectors clear the back panel, then tilt the top
of the panel away from the chassis and remove it.
4. With the mounting panel out of the way, you can access both sides of the peripheral mounting
bracket and have complete access to all six drive bays.
5. To install a peripheral, simply slide it into one of the available bays and install the four screws
(two on each side) that hold the device in place.
6. Don't forget to attach the appropriate power and interface cables to your new peripheral.
7. After you have completed your peripheral installation, you can reinstall the side mounting panel
and AM-138 by reversing the steps above.
The mounting panel is an integral part of the chassis assembly. With it removed, the chassis may
shift slightly, either forward or backward. To reinstall the panel, you can realign the chassis by
placing one hand on the top of the chassis and applying pressure either forward or backward.
With the chassis properly aligned, the panel will slide into place.
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. Before
installing a peripheral, make sure you read the documentation pertaining to the device.
If the documentation was not included with your peripheral device, it is probably contained on the
AlphaCD which is distributed to all Alpha Micro Value Added Resellers on a periodic basis, and on our
Web site at www.amos-online.com.
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