Commodore Amiga User manual

Technical Manual
Commodore AMIGA
o
Commodore

AMIGA COMPUTER
MODEL 1000
ASSEMBLY LEVEL REPAIR
PN 140 8-01
Commodore-Amiga, Inc.
1200 Wilson Drive, West Chester, Pennsylvania 19 80 U.S.A.
Commodore-Amiga Inc. makes no expressed or im
plied warranties with regard to the information con
tained herein. The information is made available
solely on an as is basis, and the entire risk as to
quality and accuracy is with the user. Commodore-
Amiga Inc. shall not be liable for any consequen
tial or incidental damages in connection with the
use of the information contained herein. The listing
of any available replacement part herein does not
constitute in any case a recommendation, warranty
or guaranty as to quality or suitability of such
replacement part. Reproduction or use without ex
pressed permission, of editorial or pictorial content,
in any matter is prohibited.
This manual contains copyrighted and proprietary information. No part
of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical,
photocopying, recording or otherwise, without the prior written permis
sion of Commodore-Amiga Inc.
Copyright © 1985 by Commodore-Amiga Inc.
All rights reserved.

AMIGA 1000 ASSEMBLY LEVEL REPAIR
INTRODUCTION
The AMIGA 1000 Assembly Level Repair module is divided into sections:
Section 1:
Section 2:
Section :
Set-up & Test
Computer Disassembly
Computer Assembly
Section 1 is intended to instruct the technician in proper set-up and diagnosis
of problems to the ASSEMBLY LEVEL. Assembly level may be defined as those
portions of the unit that may be easily disassembled and replaced without in
volvement with chip/component repair.
Section 2 is step-by-step illustration of how to remove the various assemblies
from the unit. An overview of the assemblies is given on page 1-1.
Section is a guide to re-assembling the computer after a repair is completed.
WARRANTY REPAIR is to be accomplished at the ASSEMBLY LEVEL. That is,
as it is described within these sections. Out-of-warranty repair at the compo
nent (chip) level will be introduced to the AQS center in a timely manner.

AMIGA 1000 ASSEMBLY LEVEL REPAIR
SECTION 1. SET-UP & TESTING
1.1 ASSEMBLY OVERVIEW
ASSEMBLY OVERVIEW
THE MAJOR ASSEMBLIES IDENTIFIED
NOTE: A complete list of assembly and
accessory parts for the AMIGA
1000 computer is given in the
parts/price list, titled assembly
level parts.
POS. DESCRIPTION PART NO. QTY.
1HOU SING, TOP 327002-01 1
2BRKT., D ISK DRIVE MTG. 327013-01 1
3 P.C.B 327137-01 1
4 D ISK D RIVE 327156-01 1
5HOU SING, RE R P NEL 327003-01 1
6HOUSING-BO TTO M 327001-01 1
7COVER, EXP NSIO N 327020-01 1
8 BUTTON 327006-01 1
9 PO W ER SUPPLY 327173-01 1
10 BEZEL 327004-01 1
11 CO VER, R M D ISPL Y 327005-01 1
12 FOOT 327054-01 5
1-1

AMIGA 1000 ASSEMBLY LEVEL REPAIR
Required Equipment:
Kickstart Disk
Workbench Disk
Workbench Dealer Demo Disk
Blank Disk or Disk for Testing
Monitor
RAM Expansion Cartridge 1050
Mouse or Keyboard
Known Good Drive
Known Good PCB
Oscilloscope
OPTIONAL: Service Diagnostic Aide
1.2 PRELIMINARY NOTES
, If a SOFTWARE PROBLEM is suspected, verify that the software package operates
^CORRECTLY ON A “ Known Good" system before beginning test on the
'• "Suspected Bad" system.
1.2.1 When the system is POWERED-DOWN, it should be left OFF for at least 5 seconds before
it is powered up again.
IF THIS IS NOT DONE, THE AC POWER SWITCH MAY FAIL.
Whenever possible, RESET the system by depressing the "CNTRL" key and both "A " keys,
simultaneously.
1.2.2 It may be necessary to insert a diskette MORE THAN ONCE before it is seated correctly
in the drive. Continued difficulty in correctly seating the disk indicates a defective or incom
patible disk or a drive mechanical problem.
1.2. NEVER remove a disk when the DISK ACCESS LED is ON. Damage to the disk may
result. If the system LOCKS-UP, RESET it by depressing the "CNTRL" key and both "A "
keys, simultaneously.
1.2.4 If a PCB is replaced, ALL case and shield screws must be re-installed.
IF SCREWS ARE MISSING, EXCESSIVE RF NOISE MAY RESULT.
1.2.5 The GROUND STRAP on the drive assembly must be connected when the disk is being
accessed.
IF THE GROUND STRAP IS NOT CONNECTED, READ/WRITE ERRORS MAY OCCUR.
1.2.6 If the system LOCKS-UP when the keyboard is disconnected and connected, it may
indicate a defective keyboard.
1.2.7 System functions that are displayed as GHOST functions are NOT OPERATIONAL at
this time. An attempt to use those functions may appear to be a malfunction of the system.
1-2

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1. .1 Connect AC power, the keyboard, a mouse (if not available, see below) and the monitor
to the AMIGA computer. DO NOT connect any other devices to the computer at this time.
Mouseless Operation of the Amiga
On the AMIGA, anything you can do with the mouse you can also do from the keyboard:
• Pressing, at the same time, an AMIGA key and one of the cursor keys (the keys
with arrows on top that are to the right of and slightly below the RETURN key) moves
the Pointer in the direction of the arrow.
• Pressing, at the same time, an AMIGA key, the SHIFT key, and one of the cursor
keys also moves the Pointer, but faster.
• Pressing, at the same time, the left AMIGA key and the left ALT key (the key just
to the left of the left AMIGA key) is like pressing the Selection button, the left but
ton on the mouse.
• Pressing, at the same time, the right AMIGA key and the right ALT key (the key
just to the right of the right AMIGA key) is like pressing the Menu button, the right
button on the mouse.
1. .2 Turn the POWER SWITCH, located on the left side of the system toward the front, to
the ON position.
1. . The RED Power LED, located at the left front corner of the system, should BLINK on
system power-up, then display solid red.
1. .4 Check that the unit FAN IS RUNNING by placing your hand near the left rear corner
of the computer. A slight amount of air flow should be felt.
1. .5 In approximately 20 seconds, the screen should turn white and, approximately 5 seconds
later, a hand should be displayed holding a diskette labeled KICKSTART.
The system is requesting the Boot-Up diskette, called KICKSTART, to be inserted. When
the system reaches this point, it is a good indication that the system data and address lines
are all operating.
• If the above sequence of steps occur CORRECTLY, continue to SYSTEM DRIVE TEST
on page 1-6.
• If the above sequence of steps DO NOT occur, continue to POWER SUPPLY TEST on
page 1-4.
1.3 SYSTEM POWER UP
1-3

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.4.1 Remove the TOP COVER and SHIELD from the computer.
• Refer to SECTION 2, COMPUTER DISASSEMBLY, Steps 2. and 2.4.
1.4.2 Using an oscilloscope, measure the following signals at the power supply connector, J14:
1. POWER SUPPLY TEST
A. Pin 1 — Purple Lead — CnnctJ14 — Should = - 5 VDC
B. Pin 2 — Orange Lead — Cnnct J14 — Should = + 12 VDC
C. Pin ,4 — Black Leads — Cnnct J14 — Should = Sys GND
D. Pin 5,6 — Red Leads — Cnnct J14 — Should = + 5 VDC
E. Pin 7 — Gray Lead — Cnnct J14 — Should = 60 Hz
• If ALL readings are CORRECT, continue to 1.5 VIDEO OUTPUT CHECK.
• If ANY readings are INCORRECT, continue to Step 1.4. below.
1.4. Unplug connector J14 from the PCB and measure the molex connector.
A. Pin 1 — Purple Lead — Cnnct J14 — Should = - 5 VDC
B. Pin 2 — Orange Lead — Cnnct J14 — Should = + 12 VDC
C. Pin -4 — Black Leads — Cnnct J14 — Should = Sys GND
D. Pin 5-6 — Red Leads — Cnnct J14 — Should = + 5 VDC
E. Pin 7 — Gray Lead — Cnnct J14 — Should = 60 Hz
• If ALL readings are CORRECT, continue to Step 1.4.4 below.
• If ANY readings are INCORRECT, REPLACE the power supply.
Refer to SECTION 2, COMPUTER DISASSEMBLY, Steps 2.5, 2.6, 2.7.
1.4.4 Plug connector J14 into the PCB and unplug connector J1 . Measure at connector J14.
A. Pin 1 — Purple Lead — Cnnct J14 — Should = - 5 VDC
B. Pin 2 — Orange Lead — Cnnct J14 — Should = + 12 VDC
C. Pin -4 — Black Leads — Cnnct J14 — Should = Sys GND
D. Pin 5-6 — Red Leads — Cnnct J14 — Should = + 5 VDC
E. Pin 7 — Gray Lead — Cnnct J14 — Should = 60 Hz
• If ALL readings are CORRECT, REPLACE the DRIVE MECHANISM.
Refer to SECTION 2, COMPUTER DISASSEMBLY, Step 2.5.
• If ANY readings are INCORRECT, REPLACE the POWER SUPPLY.
Refer to SECTION 2, COMPUTER DISASSEMBLY, Steps 2.5, 2.6 and 2.7.
1-4

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.5 VIDEO OUTPUT CHECK
1.5.1 Measure signals on the PCB at locations:
A. Resistor R16 —Should
B. Resistor R2 —Should
C. Resistor R24 —Should
D. Resistor R25 —Should
Approx. + 5 Volt Composite Sync
Approx. +1 Volt Analog Blue
Approx. + 1 Volt Analog Green
Approx. + 1 Volt Analog Red
• If ALL readings are CORRECT, check MONITOR and CABLE CONNECTIONS.
• If MONITOR and CONNECTIONS ARE OK, REPLACE the COMPUTER PCB.
Refer to SECTION 2, COMPUTER DISASSEMBLY, Steps 2.5 and 2.6.
• If ANY readings are INCORRECT, REPLACE the COMPUTER PCB.
Refer to SECTION 2, COMPUTER DISASSEMBLY, Steps 2.5 and 2.6.
1-5

AMIGA 1000 ASSEMBLY LEVEL REPAIR
NOTE: WRITE-PROTECT ALL VOLUME DISKS
BEFORE BEGINNING!
• Slide the write-protect tab up toward the edge
of the disk to expose the small hole in the disk
case.
1.6 SYSTEM DRIVE TEST
1.6.1 Insert the diskette labeled KICKSTART into the internal drive.
At this time, the screen should turn white as the system loads the disk. The drive activity
light will flash briefly and the drive access sounds should be heard. After approximately 0
seconds and some screen changes, the system should display a hand holding a diskette
labeled WORKBENCH.
• If the hand holding the diskette labeled KICKSTART REAPPEARS, re-seat the diskette and
RETRY. If after or 4 retries, the system still does not accept the KICKSTART diskette, try
a DIFFERENT COPY of the disk.
• If the disk still WILL NOT LOAD, continue to 1.7 DRIVE ASSEMBLY CHECK.
1.6.2 Remove the KICKSTART disk.
1.6. Insert the diskette labeled WORKBENCH into the internal drive.
At this time, the screen will turn white for approximately 2 seconds and then display the
boot-up message while continuing to load from the disk.
• If the hand holding the diskette labeled WORKBENCH REAPPEARS, re-seat the diskette and
RETRY. If after or 4 retries, the system still does not accept the WORKBENCH diskette,
try a DIFFERENT copy of the disk.
• If the disk STILL WILL NOT LOAD, continue to 1.7 DRIVE ASSEMBLY CHECK.
When loading is complete, the screen will be blue with the WORKBENCH DISK ICON in the
upper right hand corner. The TITLE BAR message will be:
Amiga Workbench Version 1 0 167840 free memory
1.6.4 Select the WORKBENCH ICON with the mouse.
With the mouse, move the pointer on to the ICON and click the left button once. The ICON
will turn black to indicate it has been selected.
1.6.5 Select DUPLICATE from the menu.
Press and hold the right mouse button while sliding the pointer to the upper left corner of
the title bar. When the pointer is over the word Workbench, the word will highlight and the
menu selection will be displayed.
Continue to depress the right mouse button and slide the pointer down to the word
DUPLICATE and, when DUPLICATE is highlighted, release the right mouse button.
The DISKCOPY WINDOW will be displayed and will continue to prompt you through the en
tire DISKCOPY procedure.
1-6

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.6.6 Select CONTINUE with the left mouse button.
• WRITE-PROTECT YOUR VOLUME COPY OF WORKBENCH by sliding the tab to the UP posi
tion (toward the edge of the disk, open hole can be seen).
1.6.7 Follow the DISKCOPY instructions as they are displayed on the screen and select CONTINUE
with the left mouse button until the copy is complete.
• During the DISKCOPY the drive is writing, reading and verifying data. If the copy is com
pleted without a problem continue to 1.6.8.
• If a problem is encountered, try a DIFFERENT DESTINATION DISK or a DIFFERENT SOURCE
DISK.
• If the problem continues, refer to 1.7 DRIVE ASSEMBLY CHECK.
1.6.8 Select the VOLUME WORKBENCH DISK with the mouse.
With the pointer on the WORKBENCH DISK ICON, double-click the left mouse button. The
WORKBENCH WINDOW will be displayed.
1.6.9 Select PREFERENCES.
With the pointer on the PREFERENCES ICON, double-click the left mouse button. The screen
will clear and then display the WINDOW to select preferences.
1.6.10 Set the CLOCK.
Position the pointer on one of the numbers depicting the time. Click the left mouse button
once, move the pointer to the up/down arrows and then advance the selected number with
successive clicks of the left mouse button.
Continue until the correct time is set on the 24 hour clock.
1.6.11 SAVE the preferences you have set, to TEST the WRITE-PROTECT SENSOR.
Move the pointer to the gadget marked SAVE and click the left mouse button.
• If the SYSTEM REQUEST WINDOW appears and indicates that the disk is WRITE-PROTECTED,
continue to 1.6.12.
• If the preferences ARE saved to the disk with the write-protect tab set correctly on the disk,
the write-protect sensor is DEFECTIVE. EXCHANGE THE DRIVE ASSEMBLY.
Refer to SECTION 2, COMPUTER DISASSEMBLY.
1.6.12 CANCEL the preferences save.
Move'the pointer to the CANCEL gadget and click the left mouse button.
• IF THE DRIVE HAS SUCCESSFULLY PASSED ALL OF THESE EXERCISES, IT SHOULD BE
ASSUMED THAT IT IS A GOOD DRIVE. Continue to 1.8 SYSTEM PCB TEST to verify a possible
hardware failure.
1-7

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.7 DRIVE ASSEMBLY CHECK
1.7.1 Follow the DISASSEMBLY sequence in SECTION 2 to obtain access to the drive.
1.7.2 To check an internal DRIVE ASSEMBLY, disconnect the ground, power and ribbon cables
from the back of the drive. Place a "known good" drive assembly on top of the installed
drive and connect the cables to it.
1.7. Power-up the system and begin testing from the start.
• If the system now PASSES all tests, EXCHANGE the DRIVE ASSEMBLY.
• If the system still FAILS, a PCB exchange will be necessary.
Refer to SECTION 2, COMPUTER DISASSEMBLY.
1-8

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.8.1 Select the CLOCK ICON.
Position the pointer on the clock and double-click the left mouse button. The clock window
will be displayed.
Check for CORRECT TIME and that the display is NOT DISTORTED.
• If INCORRECT, refer to 1.9 PCB CHECK.
1.8.2 Drag the CLOCK WINDOW to the lower right corner of the screen.
Position the pointer on the DRAG BAR, depress the left mouse button, move the clock win
dow and release the mouse button.
Now the WORKBENCH ICONS are accessible and the CLOCK WINDOW remains visible.
1.8. Select the DEMOS DRAWER.
Position the mouse on the DEMOS DRAWER and double-click the left mouse button.
The DEMOS WINDOW will appear.
1.8.4 Select DOTS, then BOXES and then LINES.
Position the pointer on each ICON and double-click the left mouse button to load each
DEMO.
The DEMO WINDOWS will appear overlapping each other. Verify that each DEMO is loaded
and running.
NOTE: That as each demo is selected, the amount of FREE
MEMORY is REDUCED.
• If ALL DEMOS and the CLOCK are running properly, continue to 1.8.5.
• If the CLOCK is DISTORTED or the DEMOS will NOT RUN, refer to 1.9 PCB CHECK.
1.8.5 CLOSE the DEMOS and the DEMO WINDOW.
Position the pointer on the CLOSE GADGET H (in the upper left corner) of each open
DEMO and click the left mouse button once.
NOTE: As each window is closed, additional FREE MEMORY
blocks should be added to the TITLE BAR.
Verify that the CLOCK is still running correctly.
• If NO PROBLEM is encountered, CONTINUE to 1.8.6.
• If the CLOCK is DISTORTED or a problem is encountered, refer to 1.9 PCB CHECK.
1.8 SYSTEM PCB TEST
1-9

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.8.6 Insert the dealer WORKBENCH DEMOS disk.
The WORKBENCH DEMOS disk ICON will appear in the upper right quadrant of the screen.
1.8.7 Select the ICON for WORKBENCH DEMOS.
Position the pointer on the ICON and double-click the left mouse button.
The WORKBENCH DEMO WINDOW will appear in the lower right corner, blocking view of
the clock, temporarily.
1.8.8 Select the GRAPHICS DRAWER.
When the WORKBENCH DEMOS WINDOW appears, position the pointer on the GRAPHICS
drawer and double-click the left mouse button.
CAUTION:
All other demos on the WORKBENCH DEMO DISK
will NOT run without memory expansion. Sufficient
memory is available to run the GRAPHICS demos
ONE AT A TIME.
1.8.8 CLOSE the WORKBENCH DEMOS WINDOW.
Position the pointer on the CLOSE GADGET □ and click the left mouse button once.
The CLOCK will be visible again.
1.8.10 Select the FIELDS graphic demo.
Position the pointer on the FIELDS balloon and double-click the left mouse button.
The screen will become white and a "bouncing” line will be seen. Within a few seconds
the line will split to several different color planes constantly moving on the screen changing
their size, shape and color.
Verify that:
Images move smoothly.
Edges of colored planes are sharp and jagged.
Colors do not bleed outside of shape.
Background is clear-free of color speckles.
• If INCORRECT, refer to 1.9 PCB CHECK.
• If CORRECT, continue to 1.8.11.
1-10

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.8.11 Access the WORKBENCH screen.
With the mouse, move the pointer to the upper edge of the screen until it can go no
farther.
Depress and hold the left mouse button and simultaneously move the mouse down to view
the WORKBENCH screen.
Verify that:
Free memory in the title bar is periodically updated.
Clock is running properly.
• If INCORRECT, refer to 1.9 PCB CHECK.
• If CORRECT, continue to 1.10 RAM EXPANSION TEST.
NOTE: For COMPLETE SYSTEM TEST the RAM EX
PANSION TEST MUST BE RUN. It is the best
exercise of the CUSTOM CHIPS available at this
time.
1-11

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.9 PCB CHECK
NOTE: Initially, it may be necessary to replace the PCB en
tirely to check if a PCB EXCHANGE is necessary.
Follow the disassembly/assembly instructions in Sec
tions 2 and . Once the DIAGNOSTIC AIDE is available
in the field, you may confirm proper operation of the
system by following these steps:
1.9.1 Place a “ known good" PCB on the bench beside the unit under test.
• Refer to SECTION 2, COMPUTER DISASSEMBLY, to open case and remove shield.
1.9.2 The DIAGNOSTIC AIDE is a straight-through test device that enables you to run the system
from the “known good” board. Position the DIAGNOSTIC AIDE over the holes in the casework
at the front of the unit.
1.9. Remove the cables from the unit PCB and connect them to the DIAGNOSTIC AIDE as indicated.
1.9.4 Attach the DIAGNOSTIC AIDE cables to the “ known good" board and it will now run the
system.
1.9.5 Return to SYSTEM TEST and begin test from the start.
• If the system now PASSES all tests, EXCHANGE THE PCB ASSEMBLY.
• If the system still FAILS, verify that your "known good" PCB is in fact GOOD.
1-12

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.10.1 Turn system OFF.
1.10.2 Remove RAM EXPANSION COVER from front of computer.
1.10.3 Insert RAM EXPANSION CARTRIDGE A1050.
Install the cartridge straight onto the card edge connector.
Be certain it is secure.
1.10.4 Replace RAM EXPANSION COVER.
1.10.5 Power ON.
1.10.6 Insert the diskette labeled KICKSTART into the internal drive.
At this time, the screen should turn white as the system loads the disk. The drive activity
light will flash briefly and the drive access sounds should be heard. After approximately 0
seconds and some screen changes, the system should display a hand holding a diskette
labeled WORKBENCH.
• If the hand holding the diskette labeled KICKSTART REAPPEARS, re-seat the diskette and
RETRY. If after or 4 retries, the system still does not accept the KICKSTART diskette, try
a DIFFERENT COPY of the disk.
• If-the disk still WILL NOT LOAD, refer to 1.7 DRIVE ASSEMBLY CHECK
OR
• If the drive was previously tested as OK, EXCHANGE the RAM EXPANSION CARTRIDGE and
RETRY.
1.10.7 Remove the KICKSTART disk.
1.10.8 Insert the diskette labeled WORKBENCH into the internal drive.
At this time, the screen will turn white for approximately 2 seconds and then display the
boot-up message while continuing to load from the disk.
• If the hand holding the diskette labeled WORKBENCH REAPPEARS, re-seat the diskette and
RETRY. If after or 4 retries, the system still does not accept the WORKBENCH diskette,
try a DIFFERENT copy of the disk.
• If the disk STILL WILL NOT LOAD, refer to 1.7 DRIVE ASSEMBLY CHECK.
OR
• If the drive was previously tested as OK, EXCHANGE THE RAM EXPANSION CARTRIDGE
and RETRY.
When loading is complete, the screen will be blue with the WORKBENCH DISK ICON in the
upper right hand corner. The TITLE BAR message will be:
Amiga Workbench Version 1 0 429928 free memory
1.10 RAM EXPANSION TEST
1-13

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.10.9 Insert the DEALER WORKBENCH DEMO DISK Version 1.0.
The WORKBENCH DEMOS ICON will appear and the TITLE BAR will be updated to;
Amiga Workbench Version 1 0 428704 free memory
1.10.10 Select the WORKBENCH DEMOS ICON with the mouse.
With the mouse, move the pointer on to the ICON and double-click the left button.
1.10.11 Select the ANIMATIONS DRAWER from the WORKBENCH DEMOS window.
With the pointer on the drawer, double-click the left mouse button.
1.10.12 Select ROBO-CITY from the ANIMATIONS window.
With the pointer on the FIGURE for Robo-City double-click the left mouse button.
Verify that:
Images move correctly
Colors do not bleed
• If INCORRECT, refer to 1.9 PCB CHECK. Problem may be the CUSTOM CHIPS on the main
board.
OR
Exchange the 1050 RAM EXPANSION CARTRIDGE and RETRY.
• If CORRECT, continue to 1.10.1 .
1.10.1 Access the WORKBENCH screen.
With the mouse, move the pointer to the upper edge of the screen until it can go no
farther.
Depress and hold the left mouse button and, at the same time, move the mouse back to
view the WORKBENCH screen.
1.10.14 Close ROBO-CITY and the ANIMATIONS window.
Position the pointer on the CLOSE GADGET H for each window and click the left mouse
button once.
1.10.15 Open the PICTURES drawer.
Position the pointer on the PICTURES drawer and double-click the left mouse button.
NOTE: With the RAM EXPANSION CARTRIDGE added, ALL
PICTURES are accessible. However the MANDRIL is
the best test that the system is working properly.
1-14

AMIGA 1000 ASSEMBLY LEVEL REPAIR
1.10.16 Load MANDRIL from the PICTURES window.
Position the pointer on the MANDRIL balloon and double-click the left mouse button.
Verify that:
MANDRIL display is complete
Colors do not bleed
The CLOSE GADGET for MANDRIL is not operational in Version 1.0. Therefore, it is
necessary to RESET the system with the AMIGA/CTRL keys if additional testing is desired.
• If INCORRECT, refer to 1.9 PCB CHECK. Problem may be the CUSTOM CHIPS on the main
board.
OR
EXCHANGE the 1050 RAM EXPANSION CARTRIDGE and RETRY.
• If CORRECT, the main PCB and RAM EXPANSION CARTRIDGE should be considered GOOD.
1-15

AMIGA 1000 ASSEMBLY LEVEL REPAIR
NOTE: At present, the best procedure to check a keyboard
is by using NOTEPAD. If additional help is needed to
load NOTEPAD refer to 1.6 SYSTEM DISK TEST and
1.7 SYSTEM PCB TEST.
1.11 KEYBOARD TEST
1.11.1 Insert KICKSTART disk when prompt appears.
1.11.2 Insert WORKBENCH disk when prompt appears.
1.11. Select WORKBENCH disk ICON.
1.11.4 Select UTILITIES DRAWER from WORKBENCH WINDOW.
1.11.5 Select NOTEPAD from UTILITIES WINDOW. Wait for the NOTEPAD to turn white before
beginning keyboard test.
1.11.6 Hit every key to verify proper operation. Function keys appear on the screen as ~.
1.11.7 Check the LED operation on the CAPS LOCK key.
• If any key operation is INCORRECT, EXCHANGE KEYBOARD and RETRY.
• If all key operations are CORRECT, KEYBOARD should be considered GOOD.
1-16

AMIGA 1000 ASSEMBLY LEVEL REPAIR
SECTION 2. COMPUTER DISASSEMBLY
PLEASE NOTE: The disassembly of the AMIGA 1000 should only be
attempted by a qualified technician using proper static
protection procedures and equipment.
2.1 REAR CONNECTORS
2.1.1 Set power switch to OFF position and remove
power cord.
2.1.2 Remove all peripheral cables and keyboard con
nector from rear of unit. See Fig. 2-1.
2.1. Remove mouse from connector, if present. See
Fig. 2-2. Fig. 2-1. Rear Connectors
2.2 KEYBOARD
2.2.1 If keyboard replacement is necessary, remove
keyboard cable from keyboard assembly, DO NOT REMOVE
KEYBOARD FROM CASE ASSEMBLY. Warranty exchange
is for the entire keyboard assembly, as shown in Fig. 2- .
Fig. 2-2. Front/Side View
2. OPENING THE CASE
2. .1 With the computer facing you and the drive on
your right, remove the RAM DISPLAY COVER by applying
light pressure on the top and bottom of the center panel
and gently pulling toward you. See Fig. 2-2.
2. .2 If a RAM EXPANSION card has been installed,
remove it by gently pulling the expansion card toward you.
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2-1