Eventide ARGUS 3000 User manual

- Eventide
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Eventide Avionics
Division of Eventide, Inc.
1 Alsan Way
Little Ferry, New Jersey 07643
United States of America
lj [phone]
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Maintenance Manual
y ARGUS 3000, 5000, 7000
Lj Moving Map Display
^ Printed in United States of America, Copyright Eventide Inc., 1992,1993
First Printing: July 1992
I ) Second Printing: February 1993
^ Third Printing: July 1993 Information on CPU board with single ROM
UAH rights reserved. No part of this Manual may be reproduced or transmitted in any form or by any
means without the written permission of Eventide, Inc.
I The information in this manual has been reviewed and is believed to be entirely reliable, however, no
J responsibility is assumed for any inaccuracies. Contents of this Manual are subject to change without
prior notice.
Additional Copies of this manual may be purchased for $50.00, prepaid and postpaid.
LJ
EVENTIDE INC. * ONE ALSAN WAY * LITTLE FERRY, NEW JERSEY 07643 * 201-641-1200 * FAX [phone]
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Table of Contents
Conventions in This Manual iv
Section 1 GENERAL
1.1 Purpose 1
1.2 Before You Begin 1
1.3 Anti-Static Precautions 2
1.4 What To Replace ' 2
1.5 Different Models 3
Section 2 DATABASE REPLACEMENT
2.1 General 4
2.2 3000 Database Replacement 4
2.3 5000 Database Board Replacement 4
2.4 7000 Database Board Replacement 5
Section 3 OPERATING SYSTEM REPLACEMENT
3.1 General 7
3.2 3000 Database/Operating System Replacement 7
3.3 5000 Operating System Replacement 10
3.4 7000 Operating System Replacement 12
3.5 Identification Plate Replacement 15
3.6 ROM replacement on single-ROM CPU hoards 17
Section 4 TROUBLE SHOOTING
4.1 General 18
4.2 If Any Tests Fail 18
Section 5 BATTERY REPLACEMENT
5.1 General 21
5.2 5000 Battery Replacement 21
5.3 7000 Battery Replacement 24
Argus Maintenance Manual Part #5006M July, 1993 Page i

Section 6 SHORTING PLUG JACK REPLACEMENT '
6.1 General 27 H
6.2 5000 Shorting Plug Jack Replacement 27 '
6.3 7000 Shorting Plug Jack Replacement 29
Section 7 CPU BOARD REPLACEMENT
7.1 General 32
7.2 3000 and 5000 CPU Board Replacement 32
7.3 7000 CPU Board Replacement 34
Section 8 DAUGHTER BOARD REPLACEMENT ^
8.1 General 37
8.2 3000 or 5000 Daughter Board Replacement 37 H
8.3 7000 Daughter Board Replacement 41 /
8.4 Check The Operating Voltage 43
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Section 9 FUSE REPLACEMENT
9.1 General 46 i \
9.2 3000 and 5000 Fuse Replacement 46
9.3 7000 Fuse Replacement 49 r*
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Section 10 ON/OFF SWITCH REPLACEMENT -.
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10.1 General 51
10.2 3000 and 5000 ON/OFF Switch Replacement 51 f\
10.3 7000 ON/OFF Switch Replacement 54
Section 11 KEY CAP REPLACEMENT ^
11.1 General 58 _,
11.2 Replacing The Key Cap 58
Section 12 DISPLAY ADJUSTMENTS ^
12.1 General 59
12.2 Adjusting the Swash Plates (Centering Image) 59
12.2.1 Adjusting the Swash Plates in 3000 and 5000 59
12.2.2 Adjusting the Swash Plates in 7000 61
12.3 Other Adjustments 62 **\
Page ii Argus Maintenance Manual Part #5006 July, 1993 "i
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List of Tables
Table Description Page
1 Ordering Part Numbers 3
2 Status Error Codes 19
List of Illustrations
igure Description Page
1 7000 Front Panel 6
2 Location of ROM Chips on 3000 CPU Board 8
3 Location of ROM Chips on 5000 CPU Board 11
4 Location of ROM Chips on 7000 CPU Board 14
5 Proper Placement of Red-Marked Screws on 7000 16
5A ROM location on single-ROM CPU board 17
6 Location of Lithium Battery on 5000 and 7000 CPU Boards 22
7 Location of Shorting Plug Jack on 5000 and 7000 CPU Boards 28
8 Location of Daughter Board on Main Power Supply Board 39
9 Proper Placement of Red-Marked Screws on 3000 and 5000 40
10 Location of Potentiometer on 3000 and 5000 44
11 Location of Potentiometer on 7000 45
12 Location of 3-Amp Fuse on Main Power Supply Board 47
13 ON/OFF Switch Assembly in 3000 and 5000 52
14 ON/OFF Switch Assembly in 7000 56
15 Swash Plates on Yoke 60
16 Location of Display Adjustments on Main Power Supply Board 63
Argus Maintenance Manual Part #5006 July, 1993 Page ill

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Conventions in This Manual !"]
This manual presents certain information in the form of WARNING, CAUTION, and NOTE statements.
The information contained in these statements is too important to be left in the regular text where it might
be overlooked. These statements are intended to be easily identified. The format of each is illustrated
below, with an explanation of the kind of information that type of statement contains.
WARNING
WARNING statements warn the user about certain conditions or practices which could
result in physical harm.
CAUTION
CAUTION statements identify conditions or practices that could cause damage to the
ARGUS or to other equipment.
NOTE
NOTE statements call attention to specific information.
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Page iv Argus Maintenance Manual Part #5006 July, 1993

u Section 1
GENERAL
I 1.1 Purpose
The purpose of this manual is to guide you in simple repair of the Argus models 3000, 5000, and 7000,
\ \ or in updating the unit's database and/or operating system. This manual also provides information
u regarding adjusting the screen display.
V j Repairs or updates to the Argus are limited to replacement of the following:
""* * Database board in models 5000 and 7000
j I * Database/operating system in model 3000 (four ROM chips on CPU board)
~" * Operating system in models 5000 or 7000 (one or two ROM chips on CPU board)
i | * Internal lithium battery in models 5000 and 7000 (on CPU board)
^ * Shorting Plug Jack in models 5000 and 7000 (on CPU board)
/ I * Central Processing Unit (CPU) board
U * Daughter board (also called small power supply board)
, I * 3-amp fuse (on mother board, also called main power supply board)
Li * ON/OFF switch assembly
* Key caps
]J The information in this manual helps you to identify which board or component might need replacing.
i | This manual is designed to be used by a qualified installation center, and is not normally intended for use
ji by the Argus owner or operator.
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1.2 Before You Begin
, , Read all instmctions thoroughly before beginning any procedure described in this manual. Be sure you
f j have the proper tools and sufficient time to complete the task before beginning.
WARNING
J Repairs to these instruments should only be performed by qualified personnel. Do not
attempt any repairs not described in this manual.
" 1
U NOTE
p; When removing screws from the Argus, it is very important to note the position of each
jl screw. Vie screws are purposely different sizes. It is imperative that they are replaced in
their original positions.
\j, Argus Maintenance Manual Part #5006 July, 1993 Page 1
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The 7000 is designed so that the database board can be replaced without removing the unit from the
aircraft. The key caps can also be replaced while the unit is still mounted in place. For all other repairs
and replacements, the Argus must be first be removed from the aircraft.
1.3 Anti-Static Precautions
Follow standard anti-static precautions when repairing the Argus or handling the circuit boards. Static
electricity can be very damaging to the electronic components that make up the Argus. It is important
to have a clear, clean work space. A conductive surface is best to avoid picking up static charges.
Keep the part to be replaced in its anti-static packaging until you are ready to install it into the Argus.
Make sure any tools you will be using are also clean and free from metal particles.
Begin work only when you have the time to go through the entire procedure without having to get up to
move around. Get yourself comfortable in one spot. Before you open the Argus or the package
containing the replacement part, touch a grounded piece of metal with one hand, and while you are still
grounded, touch the Argus, the replacement part's package, and your tools with the other hand. This
will discharge all the static charges before you start. You should also touch the grounded metal briefly
every few minutes.
1.4 What To Replace
The part that will probably be replaced most often is the database. This information is updated by
Eventide Avionics every 56 days (or every 28 days for the international database). Argus models 5000
and 7000 units which are FAA approved for IFR with IFR approved Loran C, GPS, or Navigation
Management Systems must be updated every 56 days.
In the models 5000 or 7000, the database is located on the database board. When updating the database,
the entire board is replaced.
In the model 3000, the database is contained in four Read Only Memory (ROM) chips on the CPU board,
along with its operating system. All four chips must be replaced at the same time.
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The ordering part numbers for all field-replaceable parts are listed in Table 1. These parts can be ordered
by calling Eventide at [phone].
The parts that are DEFINITELY NOT field-replaceable, are the mother board (main power supply
board), Cathode Ray Tube (CRT), front panel bezel, and the deflection yoke. If any of these need to be
replaced, return the entire unit to Eventide Avionics for repair. CONTACT EVENTIDE FOR
RETURN AUTHORIZATION BEFORE RETURNING THE UNIT.
When returning an Argus for any reason, always include a note describing the problem in detail and
giving the name and phone number of someone familiar with the problem. This will allow us to repair
the unit in the least time and at the least expense.
The Argus 3000 Reference Manual and the Argus 5000 & 7000 Installation Manual each contain a trouble
shooting section which can be useful in solving problems. Some of the information is repeated in Section
4, along with additional information, to help you determine which component or board might have to be
replaced.
Page 2 Argus Maintenance Manual Part #5006 July, 1993

Table 1. Ordering Part Numbers.
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Description
Database board (model 5000)
Database board (model 7000)
Database/operating system ROM (model 3000)
Operating system ROM (model 5000 or 7000)
Lithium battery
Shorting plug
Shorting plug jack
CPU board (model 3000)
CPU board (model 5000 or 7000)
Daughter board
3-amp pico fuse
Part Number
103002
103022
*
5200-03 or -02
105003
312113
315016
103017
103001
103005
316019
ON/OFF switch assembly (specify Argus model when ordering) 300167
ENR Key cap 422057
ARR Key cap 422058
DEP Key cap 422059
AUX Key cap 422060
The ordering part number for the operating system depends on your current and new versions. Call Eventide for proper part
number.
1.5 Different Models
The three Argus models may require different steps to replace similar boards or components. A separate
description is given for each model when necessary.
Models 3000 and 5000 look the same from the outside. Inside they are very similar, but the 5000 has
an additional board for its database. (The 3000's database is located in a set of ROM chips on the CPU
board.) The 5000 needs more circuitry because of its ability to interface with other equipment. This
takes up room on the CPU board. The 5000's database is also larger, and more chips are required to
store the database.
The 7000 can almost be thought of as a 5000 turned on its side. The top and bottom panels of the 7000
are similar to the right and left panels of the 5000. One major difference in the design of the two units
is the positioning of the database board. The 7000's database board is exchanged from the front of the
unit, and can be replaced without removing the 7000 from the aircraft. To remove the database board
in the 5000, you must first remove the unit from the aircraft and then remove the right side panel to get
to the board. Another difference is the transfer board in the 7000, which interfaces the database board
to the CPU board.
Both the 5000 and 7000 contain a lithium battery, which energizes the internal clock when the unit is off.
The 3000 does not have this battery, since it does not display time.
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Section 2
DATABASE REPLACEMENT
2.1 General
Eventide Avionics creates a new database every 56 days (every 28 days for the international database).
There are also several versions of the database, with different levels of detail. Changing to a more
detailed version is an upgrade. The identification plate reflects the current status and must be replaced
whenever the database is upgraded. The procedure describing how to replace the identification plate is
in Sub-section 3.5.
Be sure to return the old database board to Eventide Avionics. If the database was upgraded, also
return the old identification plate.
Separate instructions are given for each model and procedure.
NOTE
When removing the screws, take note of their location, as it is important that they be
replaced correctly.
2.2 3000 Database Replacement
The 3000's database and operating system are stored on four ROM chips (U2, U3, U29 and U30) on the
CPU board. The database and operating system are updated in the same procedure. This procedure is
described in Sub-section 3.2.
2.3 5000 Database Board Replacement
To update the database in the model 5000, replace the database board (part #103002).
Necessary Tools: Small phillips head screwdriver
Remove The Old Database Board
1. Remove the screws from the right side panel (panel nearest the operating controls). Note
the position of smaller screws versus larger ones. Remove this panel to expose the database
board.
2. Two pairs of small pins and two 28 pin connectors on the component side of the database
board connect it to the underlying CPU board. The connectors are located near the front
panel bezel. Gently pull on the database board, lifting it up from the back of the unit and
Page 4 Argus Maintenance Manual Part #5006 July. 1993

wiggling it gently to disengage it from the connector on the CPU board. Remove the
i , database board from the unit's housing.
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Insert The New Database Board
! , 3. Remove the replacement database from its protective packaging.
U4. Align the pins on the replacement board with the connectors on the CPU board. Gently push
on the database board until the pins are seated as far as they will go.
5. Position the side panel and secure it in place with 10 flat-head screws.
u NOTE
v1 j Two different length screws are used on the side panel. The short screws go at the ends
L of the panel and the longer screws in the middle.
j i 6. Apply power to the unit and verify that the unit passes all of its self tests. If an error
'U results during the self-tests, or if the unit tails to power on, recheck the installation of the
database board.
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2.4 7000 Database Board Replacement
j j To update the database in the model 7000, replace the database board (part #103022). You can replace
^ the board without removing the 7000 from its rack in the aircraft.
Necessary Tools: Small phillips head screwdriver
Remove The Old Database Board
-v 1. Loosen the two phillips head screws on both sides of the database handle on the front panel
of the 7000. (Refer to Figure 1.) Gently pull on the handle to slide the database board out
Uof the front of the unit.
If
difficulty is encountered in removing the database, grasp the handle firmly and wiggle it
j j from side to side while pulling.
CAUTION
ji DO NOT use a screwdriver or other device to remove the database board. Using any tool
to pry out the board will damage the bezel and database board.
! Insert The New Database Board
2. Remove the replacement database board from its protective packaging.
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*~ 3. Gently insen the replacement board into the enclosure slot with the ROMs facing up. Apply
pressure until the board engages the rear connector and the handle is flush with the bezel.
^ 4. Tighten the two phillips-head screws to secure the database board into position.
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5. Apply power to the unit and verify
that the unit passes all of its self
tests. If an error results during the
self-tests, or if the unit fails to power
on, recheck the installation of the
database board.
ARGUS 7000
■SEL-
INFO-
•EMER—■
MflEX
PUSH
DATABASE HANDLE
Figure 1. 7000 Front Panel.
Page 6
Argus Maintenance Manual Part #5006 July, 1993

Section 3
OPERATING SYSTEM REPLACEMENT
3.1 General
The operating system ROM(s) are serialized. The serial number provides important information about
the particular Argus in which the ROMs are installed. The serial number displayed on the screen when
the unit is first powered on MUST match the serial number on the identification plate on the rear cover.
DO NOT interchange ROMs from one unit to another.
In the model 3000, the database and operating system are updated in the same procedure. Models 5000
and 7000 require separate procedures for updating the database or operating system. Separate instructions
are given in Sub-section 3.5 for replacing the identification plate.
NOTE
When removing the screws, rake note of their location, as it is important that they be
replaced correctly.
Be sure to return the old board or chips to Eventide Avionics, along with the old identification
plate.
3.2 3000 Database/Operating System Replacement
The 3000*s database and operating system are stored on four ROM chips (U2, U3, U29 and U30) on the
CPU board. It is important that all tour chips in the Argus be from the same set. Do not mix the
replacement chips with the ones being replaced. To replace the ROMs, you must first remove the CPU
board.
Necessary Tools: Small phillips head screwdriver
Slot-head screwdriver (for removing ROM chips)
Remove The CPU Board
1. Remove the screws from the right side panel (panel nearest the operating controls). Note
the position of smaller screws versus larger ones. Remove this panel to expose the CPU
board.
2. The rear cover is attached to the unit housing with five flat-head screws. Remove these
screws.
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CAUTION
Do not remove the red-marked screw on the top cover. This screw does not secure the rear
cover. This screw is not as long as the others because there is not as much clearance at
this location. If you remove this screw, be sure to put the correct screw back in this
location so as not to damage the unit.
3. The rear cover is connected to the CPU board. Slowly pull the rear cover out of the unit
housing until the CPU board is exposed approximately 1-1/2 inches.
4. A ribbon cable connects the solder side of the CPU board to the power supply board.
Disengage this connector and slide the CPU board completely out of the unit's housing.
5. On the rear cover there are two pan-head screws, located at either end of the 25 pin D-
connector, which secure the rear cover to the CPU board. Separate the CPU board and rear
cover by first removing these screws.
Remove The Old ROMs
6. . The location of the ROM chips on the CPU board is illustrated in Figure 2. Note the
orientation of the ROMs. Remove one chip at a time by gently slipping the very end of the
slot-head screwdriver under one end of the chip and twisting the screwdriver. Then slip the
screwdriver under the other end of the chip and twist again.
CAUTION
Do not push the screwdriver blade in so far that it can touch the surface of the printed
circuit board or you may damage the board.
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Figure 2. Location of ROM Chips on 3000 CPU Board.
Insert The New ROMs
7. Remove the new set of ROMs from their protective packaging. Note the labeling on the
chips
and the proper placement for each chip as indicated in Figure 2. Also note that each
ROM has a small notch on one end. Orient the ROMs as previously noted.
Page 8
Argus Maintenance Manual Part #5006 July. 1993

CAUTION
Jj Failure to insert ROM chips in the correct orientation will damage the ROMs. Do not
assume that the labels are in the right direction. You must orient the ROMs with the notch.
| 8. Insert the ROMs, one chip at a time as follows:
a) First place the pins on one side of the chip into the contacts on one side of the socket
J DO NOT PUSH DOWN YET.
b) Next center the pins on the other side of the chip in the contacts on that side of the
U socket. Some side pressure may be necessary.
NOTE
j f,
Lj Make sure that none of the pins are bent under the chip and that none are outside the
socket. If this happens, remove the chip, straighten the pins and try again.
jj New R°M chiPs ari- °fte" wade with their pins splayed out from the centerline of the
device. If the pins are splayed so far that gentle side pressure is not enough to center the
, pins in the socket before pushing, it may be necessary to bend the pins. The easiest way
I to do this is to push each side of the chip against your work surface until the pins are
parallel.
|l c) When ALL the pins are into the openings in the socket, push down firmly on the center
^ of the ROM chip until all the pins are seated as far as they will go.
1 | Reassemble The Arims
9. Reconnect the rear cover to the CPU board, securing it in place with the two pan-head
j i screws on either end of the D-connector.
NOTE
i
) The screws mate with locking type threads so that some turning resistance will be felt when
~* the screws are seating.
ii 10. Insert the CPU board into the unit housing as follows:
a) Hold the ribbon cable out of the way and insert the CPU board into the slot formed by
\ | the top and bottom covers until about one inch of the board is exposed.
NOTE
LJ You may encounter some resistance when the board gets to the deflection yoke. Just keep
pushing gently but firmly until the board moves.
]Jj b) Insert the ribbon cable into the connector on the solder side of the board. Hold the
ribbon cable against the solder side of the CPU board and push the board all the way in.
Argus Maintenance Manual Part #5006 July, 1993 Page 9

c) Verity that the tangs on the front edge of the CPU board have engaged in the switch
socket on the front panel bezel. If not, slide the board back out and reinsert, straightening
the tangs if needed.
11. Secure the rear cover in place with five flat-head screws.
12. Position the side panel and secure it in place with 10 flat-head screws.
NOTE
Two different length screws are used on the side panel. The short screws go at the ends
of the panel and the longer screws in the middle.
13. Apply power to the unit and verify that the unit passes all of its self tests. If an error
results during the self-tests, or if the unit fails to power on, recheck the installation of the
ROM chips.
3.3 5000 Operating System Replacement
The 5000's operating system is stored in two ROM chips (U2 and U3) located on the CPU board. It is
important that both ROM chips are from the same set. Do not mix the replacement chips with the ones
being replaced. Argus 5000 CPU boards with serial numbers greater than XX3XXX or with part
numbers 5000-2x-xx have CPU boards with only one ROM. Please refer to section 3.6 for information
on replacing it.
Replace the ROMs while the CPU board is still in the unit housing.
Necessary Tools: Small phillips head screwdriver
Slot-head screwdriver (for removing ROM chips)
Remove The Database Board
1. Remove the screws from the right side panel (panel nearest the operating controls). Note
the position of smaller screws versus larger ones. Remove this panel to expose the database
board.
2. Two pairs of small pins and two 28 pin connectors on the component side of the database
board connect it to the underlying CPU board. The connectors are located near the front
panel bezel. Gently pull on the database board, lifting it up from the back of the unit and
wiggling it gently to disengage it from the connector on the CPU board. Remove the
database board from the unit's housing.
Remove The Old ROMs
3. The location of the ROM chips on the CPU board is illustrated in Figure 3. Note the
orientation of the ROMs. Remove one chip at a time by gently slipping the very end of the
slot-head screwdriver under one end of the chip and twisting the screwdriver.
4. When the end of the chip has come part way out of the socket, slip the screwdriver in
Anther and twist it again. Repeat this step until the chip pops loose.
Page 10 Argus Maintenance Manual Part #5006 July, 1993

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CAU11OM
Do not allow the screwdriver to touch the pins at the end of the ROMs.
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Figure 3. Location of ROM Chips on 5000 CPU Board.
Insert The New ROMs
5. Remove the new set of ROMs from their protective packaging. Note the labeling on the
chips
and the proper placement for each chip as indicated in Figure 3. Also note that each
ROM has a small notch on one end. Orient the ROMs exactly as noted previously.
CAUTION
Failure to insert ROM chips in the correct orientation will damage the ROMs. Do not
assume that the labels are in the right direction. You must orient the ROMs with the notch.
6. Insert the ROMs one chip at a time as follows:
a) First place the pins on one side of the chip into the contacts on one side of the socket.
DO NOT PUSH DOWN YET.
b) Next center the pins on the other side of the chip in the contacts on that side of the
socket. Some side pressure may be necessary.
NOTE
Make sure that none of the pins are bent under the chip and that none are outside the
socket. If this happens, remove the chip, straighten the pins and try again.
New ROM chips are often made with their pins splayed out from the centerline of the
device. If the pins are splayed so far that gentle side pressure is not enough to center the
pins in the socket before pushing, it may be necessary to bend the pins. The easiest way
to do this is to push each side of the chip against your work surface until the pins are
parallel.
c) When ALL the pins are into the openings in the socket, push down firmly on the center
of the ROM chip until all the pins are seated as far as they will go.
Argus Maintenance Manual
Part #5006 July, 1993 Page 11

Reassemble The Argus
7. Align the pins on the database board with the connectors on the CPU board. Gently push
on the database board until the pins are seated as far as they will go.
8. Position the side panel and secure it in place with 10 flat-head screws.
NOTE
Two different length screws are used on the side panel. The short screws go at the ends
of the panel and the longer screws in the middle.
9. Apply power to the unit and verify that the unit passes all of its self tests. If an error results
during the self-tests, or if the unit fails to power on, recheck the installation of the ROM
chips.
3.4 7000 Operating System Replacement
The 7000's operating system is stored in two ROM chips (U2 and U3) located on the CPU board. It is
important that both ROM chips are from the same set. Do not mix the replacement chips with the ones
being replaced. Argus 7000 CPU boards with serial numbers greater than X72XXX or with part numbers
7000-2x-xx have CPU boards with only one ROM. Please refer to section 3.6 for information on
replacing it.
To replace the ROMs, you must first remove the CPU board.
Necessary Tools: Small phillips head screwdriver
Slot-head screwdriver (for removing ROM chips)
Remove The CPU Board
1. Loosen the two phillips head screws on both sides of the database handle on the front panel
of the 7000. (Refer to Figure 1 on page 6 of this manual.) Gently pull on the handle to
slide
the database board out of the front of the unit.
If difficulty is encountered in removing the database, grasp the handle firmly and wiggle it
from side to side while pulling.
CAUTION
DO NOT use a screwdriver or other device to remove the database board. Using any tool
to pry out the board will damage the bezel and database board.
2. The bottom panel is held in place with 10 screws: eight 3/16 inch screws and two 1/8 inch
screws. The 1/8 inch screws are marked in red. Note their location, then remove all ten
screws to remove the bottom panel.
3. The rear cover is attached to the unit housing with five flat-head screws. Remove these
screws.
Page 12 Argus Maintenance Manual Part #5006 July, 1993

w caution
Do not remove the red-marked screw on the right cover. This screw does not secure the
rear cover. This screw is not as long as the others because there is not as much clearance
at this location. If you remove this screw, be sure to put the correct screw back in this
location so as not to damage the unit.
4. The rear cover is connected to the CPU and transfer boards. Slowly pull the rear cover out
of the unit housing until the boards are exposed approximately 1-1/2 inches.
5. A ribbon cable connects the solder side of the CPU board to the power supply board.
Disengage this connector and slide the CPU board completely out of the unit's housing.
6. On the rear cover there are two pan-head screws, located at either end of the 25 pin D-
J ! connector, which secure the rear cover to the CPU board. Separate the CPU board and rear
LJ cover by first removing these screws.
7. The transfer board is attached to the CPU board by a connector on the end of the board
nearest the front panel of the unit. Pull the transfer board from the CPU board using a
gentle rocking motion.
Remove The Old ROMs
8. The location of the ROM chips on the CPU board is illustrated in Figure 4. Note the
orientation of the ROMs. Remove one chip at a time by gently slipping the very end of the
slot-head screwdriver under one end of the chip and twisting the screwdriver.
9. When the end of the chip has come part way out of the socket, slip the screwdriver in
further and twist it again. Repeat this step until the chip pops loose.
CAUTION
Do not allow the screwdriver to touch the pins at the end of the ROMs.
u
Argus Maintenance Manual Part #5006 July, 1993 Page 13

OPERATING SYSTEM RDMS
RED
BLACK
SHDRTING PLUG JACK BATTERY
Figure 4. Location of ROM Chips on 7000 CPU Board.
Insert The New ROMs
10. Remove the new set of ROMs from their protective packaging. Note the labeling on the
chips and the proper placement for each chip as indicated in Figure 4. Also note that each
ROM has a small notch on one end. Orient the ROMS as previously noted.
CAUTION
Failure to insert ROM chips in the correct orientation will damage the ROMs. Do not
assume that the labels are in the right direction. You must orient the ROMs with the notch.
11. Insert the ROMs, one chip at a time as follows:
a) First place the pins on one side of the chip into the contacts on one side of the socket.
DO NOT PUSH DOWN YET.
. b) Next center the pins on the other side of the chip in the contacts on that side of the
socket. Some side pressure may be necessary.
NOTE
Make sure that none of the pins are bent under the chip and that none are outside the
socket. If this happens, remove the chip, straighten the pins and try again.
New ROM chips are often made with their pins splayed out from the centerline of the
device. If the pins are splayed so far that gentle side pressure is not enough to center the
pins in the socket before pushing, it may be necessary to bend the pins. The easiest way
to do this is to push each side of the chip against your work surface until the pins are
parallel.
c) When ALL the pins are into the openings in the socket, push down firmly on the center
of the ROM chip until all the pins are seated as far as they will go.
Page 14
Argus Maintenance Manual Part #5006 July, 1993

Reassemble The Aruus
jj 12. Position the transfer board over the CPU board and line the pins of the transfer board with
the connector on the CPU board. Press firmly on the transfer board until the pins are seated
as far as they will go.
'""' 13. Reattach the rear cover to the CPU board, securing it in place with the two pan-head screws
Uon either end of the D-connector.
NOTE
I I The screws mate with locking type threads so that some turning resistance will be felt when
Ci the screws are seating.
<> ( 14. Insert the transfer and CPU boards into the unit housing as follows:
<j
a) Hold the ribbon cable out of the way and insert the boards into the slots formed by the
'j right and left covers until about one inch of the boards is exposed.
J
b) Insert the ribbon cable into the connector on the solder side of the CPU board. Hold the
I ( ribbon cable against the solder side of the CPU board and push the boards all the way in.
lJ
c) Verify that the tangs on the front edge of the CPU board have engaged in the switch
I | socket on the front panel bezel. If not, slide the board back out and reinsert, straightening
(j the tangs if needed.
. 15. Secure the rear cover in place with five flat-head screws.
w 16. Gently insert the database board into the enclosure slot and apply pressure until the board
engages the rear connector and the handle is flush with the bezel.
il
w 17. Tighten the two phillips-head screws to secure the database board into position.
■j | 18. Position the bottom panel in place and secure it with the ten flat-head screws (eight 3/16 inch
1— and two 1/8 inch). Be sure to replace the red-marked screws in the positions noted
previously and depicted in Figure 5. The two red screws are attached to the front panel
t j bezel.
W
19. Apply power to the unit and verily that the unit passes all of its self tests. If an error
j ; results during the self-tests, or if the unit fails to power on, recheck the installation of the
(J ROM chips.
j_j 3.5 Identification Plate Replacement
The identification plate is replaced in a simple two-step procedure.
1. Remove the old identification plate from the rear panel.
o
y
2. The new identification plate is self adhesive. Peel off the paper from the back of the new
plate, position the plate on the rear panel, and press firmly to attach.
Argus Maintenance Manual Part #5006 July, 1993 Page 15