Download Alpha Microsystems AM-990 Service manual

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:
AM-990 SBC
Service Manual
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
DSS-10524-00, Rev. A01
 ALPHA MICROSYSTEMS
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 depasse 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’opérateur 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 remplacement 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. 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.
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 boîtier. L’alimentation de cet ordinateur
peut produire des nivaeux de tensions dangereux, le boîtier ne devrait donc être ouvert que par un technician autorisé.
Electrical Warning
This equipment contains components that can be damaged by static electricity. Follow all electronic discharge precautions when
handling the equipment. For example, touch the metal back panel of the CPU or peripheral chassis to dissipate any electrical
charge before touching the circuit boards or equipment within the chassis. After turning off power, before you open your computer
chassis, unplug the cord from the electrical outlet to guard against electrical shock.
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 I.D. 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 Fairview St.
P.O. Box 25059
Santa Ana, CA 92704
AM-990 SBC Computer Service Manual
Page i
TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
ACCESSING YOUR COMPUTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Opening the Front Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Opening the Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Opening the Side Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Equipment Handling Precautions . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside Your Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reinstalling the Top Cover and Side Panel . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1
2
2
4
5
6
INSTALLING PERIPHERALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plastic Mounting Rails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
8
9
SBC AM-140 CPU BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Reset Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial I/O Port Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring SBC Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SBC Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
10
10
10
11
SBC AM-145 CPU BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Reset Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial I/O Port Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring SBC Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SBC Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
13
13
13
14
DSS-10524-00, Rev. A01
AM-990 SBC Computer Service Manual
Page 1
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.
The following procedures are discussed:
Accessing your computer.
Electronic equipment handling precautions.
Peripheral installation.
AM-140 and AM-145 CPU board configuration.
For details on Eagle PC board configurations, refer to the Eagle Series
Computer Service Manual,part number DSM-00196-03.
ACCESSING YOUR COMPUTER
When adding additional equipment or servicing your computer, it will be necessary to
gain access to the components inside the computer. The following sections include
instructions on opening the computer’s front door, removing the the computer’s top
cover, and removing the computer’s side panel.
Your computer operates at hazardous voltages. Before you attempt service components
inside the computer, observe the following precautions:
Turn off the computer power switch.
Unplug the AC power cord.
Remove any jewelry from your hands, wrists, and neck.
Use only insulated or nonconductive tools.
Opening the Front Door
The factory ships your computer with the door locked. The keys are tiewrapped to your
computer’s rear panel, near the power switch. Insert the key, open the lock, and the
door will swing open.
DSS-10524-00, Rev. A01
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.
2.Using a phillips-head screwdriver, remove the two screws that connect the top
cover to the chassis as shown in the illustration.
3.Don’t worry about the display panel, it is not attached to the top cover. However,
make sure the key for the security lock is not inserted in the lock when you
attempt to remove the top cover.
4.The top cover is held in place with four locking tabs, one at each corner. In order
to release the locking tabs, the top cover must be slid forward as indicated by the
arrow. The best way to do this is to use the palm of your hand to firmly strike the
rear corners of the top cover. This will cause the top cover to slide forward.
To protect your hand, place some type of padding over the rear corners of the top
cover.
5.Once the top cover slides forward, pull straight up to remove it.
6.Place the top cover out of the way so it will not get damaged. Make sure you do
not bend the locking tabs.
Opening the Side Door
To install optional boards, disk drives, backup devices, or to service the computer, you’ll
need to remove the left side panel as shown in the illustration on the following page:
1.Remove the four screws that secure the left side panel to the chassis.
2.Like the top cover, the left side panel must be slid forward in order to be removed.
3.Using the palm of your hand, firmly strike the rear edge of the side panel as
indicated by the arrow.
4.Once the panel slides forward, it can be removed by lifting straight up.
5.As with the top cover, make sure none of the alignment tabs on the side panel get
damaged.
DSS-10524-00, Rev. A01
AM-990 SBC Computer Service Manual
Page 3
LOCKING TABS
ER
V
TOP CO
LE
FT
SI
DE
PA
N
MAC4 4 2
EL
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 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. Prior to 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 below,
designed specifically to protect your equipment from harmful static discharge.
MC1012
Static Protection Wrist Strap
DSS-10524-00, Rev. A01
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:
TOP ACCESS TO OPTIONAL
AUXILIARY I/O PANEL
POWER SUPPLY
PERIPHERAL MOUNTING
AREA
COOLING FANS
J10
1
CPU
BATTERY
J2
J1
W8
J18
1
J8
J7
W1
J19
1
SW1
MAC5 7 3
TYPICAL SYSTEM
CPU BOARD
REAR PANEL ACCESS
TO I/O CONNECTORS
Inside the Computer (Side View)
DSS-10524-00, Rev. A01
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.
Use the following instructions when reinstalling the side panel and top cover:
Side Panel
1.Install the side panel before you install the top cover. The side panel has twelve
small tabs and four screws that hold it in place. To remove the panel, you pushed
it toward the front of the computer, creating about a 1/2" gap between the front lip
of the side panel with the four screw holes and the threaded holes in the cabinet.
2.To reinstall the panel, hang the side panel in the forward position and press down
on the panel, making sure both the top and bottom tabs slide into position.
3.At this point the panel should be in position vertically, but with a 1/2" gap between
the front lip of the side panel with the four screw holes and the threaded holes in
the cabinet.
4.Using the palm of your hand, firmly strike the front edge of the side panel; this will
cause the side panel to slide back into its proper mounting position.
5.Reinstall the four screws.
Top Cover
1.When setting the top cover in position, make sure each tab is aligned with a
corresponding slot on the top of the cabinet. Press the top cover down into
position.
2.Make sure each of the tabs is fully inserted, with the top cover sitting flush on top
of the cabinet.
3.Like the side panel, there will be a gap of about a 1/2" between the front lip of the
top cover with the two screw holes and the threaded holes on the front of the
computer cabinet.
4.Each corner of the top cover has a notched tab designed to hold the cover in its
mounting position. Use the palm of your hand to push the top cover back into
position, which will close the gap between the front lip of the top cover and the
threaded holes in the cabinet.
5.Install the two screws that secure the top cover to the computer cabinet.
DSS-10524-00, Rev. A01
AM-990 SBC Computer Service Manual
Page 7
INSTALLING 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
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" half-height peripherals.
The following illustration shows the peripheral mounting area for your computer with the
slots numbered 1 through 12.
PERIPHERAL MOUNTING
AREA
COOLING FANS
1
2
3
4
J10
1
5
6
CPU
7
8
BATTERY
J2
9
J1
W8
10
J18
1
J8
J7
W1
J19
1
SW1
11
12
MAC5 7 5
TYPICAL SYSTEM
CPU BOARD
Peripheral Mounting Area
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.
DSS-10524-00, Rev. A01
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. The hard disk drives are mounted in the lower part of the chassis for two
reasons: to make sure the weight in the chassis is properly distributed and to provide
easy access for both power and interface cables.
Plastic Mounting Rails
The plastic mounting rails are the key to installing peripheral devices in your computer.
Two rails are required to mount a peripheral device. The rails (DWF-20652-00) are
universal; they can be mounted on either the right or left hand side of the peripheral.
The illustration showing the rail explains how it is installed on various types of
peripherals:
PERIPHERAL MOUNTING RAIL
DWF-20652-00
LONG
END
SHORT
END
Use the top holes for mounting
full-height devices.
Use the bottom holes for
mounting half-height devices.
SHORT END
For Tandberg 1/4" streaming tape drives and all hard disk drives, mount the rails
with the short end pointing toward the rear of the computer cabinet.
LONG END
For Exabyte 8mm drives, floppy drives, and other drives (except Tandberg)
with removable media, mount the rails with the long end pointing toward the
rear of the computer cabinet.
MAC4 7 0
Peripheral Mounting Rail
Besides the rails, the peripheral mounting kit includes both standard and metric screws
for compatibility with all of Alpha Micro’s 51/4" peripherals.
DSS-10524-00, Rev. A01
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. 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 also contained
on the AlphaCD which is distributed to all Alpha Micro Value Added Resellers on a
quarterly basis.
DSS-10524-00, Rev. A01
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.
I/O expansion up to 66 serial ports.
On-board intelligent ESDI controller.
68030 Processor chip.
The sections that follow include information on user configurable options for the AM-140
board.
Most of the jumpers on the AM-140 board are factory configured and should not be
moved. Only the features discussed in the next sections have jumpers that are user
configurable.
Remote Reset Capability
As discussed in Appendix B in the owner’s manual, it is possible to reset the SBC
remotely through serial I/O Port "0." If properly configured, you can use a push button
switch to short Pin 1 in that connector to Pin 7 (Signal Ground), resetting the computer.
To enable remote reset, you must install a shorting block in the REMOTE RESET
position on the SBC main logic board. See the illustration.
Serial I/O Port Configuration
Ports 0 and 1 on the SBC are factory configured for RS-232 compatibility. You can
configure either or both of these ports for RS-422 compatibility if desired. For each port,
three jumpers on the main logic board control whether it is set for RS-232 or RS-422
compatibility. You must set all three to either 232 or 422. For Port 0, the jumpers are
W2, W3 and W4; for Port 1, they are W5, W6 and W7.
Configuring SBC Memory
Installing memory boards in the SBC couldn’t be easier. There are no jumpers to
configure, no switches to set, and no concerns with beginning or ending memory
addresses.
There are four connectors designed for SBC memory boards; J12, J13, J14, and J15.
The first memory board is installed in J12; the second memory board is installed in J13;
the third goes in J14; and the fourth goes in J15.
DSS-10524-00, Rev. A01
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. The first 32 ports are controlled by connector J7 and the second 32 ports
are controlled by connector J8.
Connector J7 supports the standard interface drivers for all of Alpha Micro’s paddle card
devices designed for the AM-355 I/O bus. AM-355 I/O boards attached to connector J7
use the same interface driver used by the two serial ports on the CPU board,
AM140.IDV. AM-358 and AM-359 I/O paddle cards, and any other AM-355 I/O bus
paddle cards attached to the J7 connector will use the drivers designed for those
specific devices. For example: AM358.IDVand AM359.IDV.
The J8 connector ONLY supports AM-355, AM-358, and AM-359 I/O paddle cards.
AM-355, AM-358 and AM-359 I/O paddle cards attached to connector J8 use special
interface drivers: AM355B.IDV, AM358B.IDV and AM359B.IDV.
For information on jumper settings, port numbering, and I/O addresses, see the
installation guide shipped with the AM-355 I/O bus device you are installing.
DSS-10524-00, Rev. A01
Page 12
AM-990 SBC Computer Service Manual
PARITY
STATUS
1
FRONT PANEL
DISPLAY
1
J17
J16
60-PIN ESDI
CONNECTOR
J15
J14
J13
J12
MEMORY
EXPANSION
W88
CPU
W15
U144
J10
LOW BYTE
FLOATING POINT
CO-PROCESSOR
SOCKET
U131
U130
BOOT PROMS
HIGH BYTE
36-PIN FLOPPY
CONNECTOR
1
50-PIN SCSI CONNECTOR
U97
W14
W13
1
J19
POWER CONNECTOR
PAL
W8
SSD SOCKET
J20
W12
NTSC
W12
REMOTE RESET
JUMPER IN = ENABLED
JUMPER OUT = DISABLED
J18
60-PIN I/O CONNECTORS
1
J8
U32
W9
W10
BATTERY
LINK TERMINATION
JUMPER
JUMPER IN = ENABLED
JUMPER OUT = DISABLED
J7
W11
W10
232 / 422
W8
W1
W4
W3
W2
J3
J5
J6
232 / 422
W7
W6
W5
J4
J2
J1
SERIAL
PORT
1
SERIAL
PORT
0
SW1
MAC4 7 8
VIDEO
OUT
LINK
VIDEO
IN
VCR
REMOTE
BOOT
SWITCH
Option Locations on the AM-140 Board
DSS-10524-00, Rev. A01
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.
I/O expansion up to 34 serial ports.
On-board floppy controller.
68020 Processor chip.
The sections that follow include information on user configurable options for the AM-145
board.
Most of the jumpers on the AM-145 board are factory configured and should not be
moved. Only the features discussed in the next sections have jumpers that are user
configurable.
Remote Reset Capability
As discussed in Appendix B in the owner’s manual, it is possible to reset the SBC
remotely through serial I/O Port "0." If properly configured, you can use a push button
switch to short Pin 1 in that connector to Pin 7 (Signal Ground), resetting the computer.
To enable remote reset, you must install a shorting block in the REMOTE RESET
position on the SBC main logic board. See the illustration.
Serial I/O Port Configuration
Ports 0 and 1 on the SBC are factory configured for RS-232 compatibility. You can
configure either or both of these ports for RS-422 compatibility if desired. For each port,
three jumpers on the main logic board control whether it is set for RS-232 or RS-422
compatibility. You must set all three to either 232 or 422. For Port 0, the jumpers are
W3, W4 and W5; for Port 1, they are W6, W7 and W8.
Configuring SBC Memory
There are four connectors designed for SBC memory expansion; J5, J6, J7, and J8.
The memory expansion board is called the AM-715-10 and has four megabytes of
memory. The maximum memory capacity of 16 megabytes is achieved by installing four
memory boards.
See the AM-715 Memory Board Installation Instructions, for detailed information on
installing memory boards.
DSS-10524-00, Rev. A01
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. These ports are in addition to the two standard AM-145
serial I/O ports (0 and 1) shown in the illustration.
AM-355 I/O boards attached to connector J9 use the same interface driver used by the
two serial ports on the CPU board, AM145.IDV. AM-358 and AM-359 I/O paddle cards
connected to the AM-355 I/O bus use the interface drivers called AM358.IDV and
AM359.IDV. Other types of boards designed to be used on the AM-355 I/O bus have
their own unique drivers.
For information on jumper settings, port numbering, and I/O addresses, see the
installation guide shipped with the AM-355 I/O bus device you are installing.
DSS-10524-00, Rev. A01
AM-990 SBC Computer Service Manual
Page 15
W18
REMOTE RESET
JUMPER IN = ENABLED
JUMPER OUT = DISABLED
FRONT PANEL
DISPLAY
1
J8
BATTERY
W18
J7
J6
W11
J5
On B. Revison artwork
and earlier W100 is
hard-wired.
MEMORY
EXPANSION
1
W100
CPU
1
HIGH BYTE
LOW BYTE
FLOATING POINT
CO-PROCESSOR
SOCKET
U128
U127
50-PIN SCSI
CONNECTOR
SSD SOCKET
U124
U126
U125
J4
W1
J16
BOOT PROMS
J1
1
36-PIN FLOPPY
CONNECTOR
J2
POWER CONNECTOR
W12
2716/2764
W1A
W17
W2
W50
W9
1
W17
J9
W13
60-PIN I/O CONNECTORS
NTSC / PAL
NTSC PAL
LINK TERMINATION
JUMPER
JUMPER IN = ENABLED
JUMPER OUT = DISABLED
W14
W15
232 / 422
232 / 422
W8
W7
W6
W13
J13
J12
J15
J21
J14
J20
SW1
MAC5 7 6
VIDEO
OUT
LINK
VIDEO
IN
VCR
REMOTE
SERIAL
PORT
1
SERIAL
PORT
0
Option Locations on the AM-145 Board
DSS-10524-00, Rev. A01
BOOT
SWITCH
W5
W4
W3