Commodore Techtopics index

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Last update: 21 May 2008

Commodore Techtopics contents

Vol I issue 1
Introduction to TechTopics
2001 series
Vol I issue 2
Read errors on 2040 floppy drive
Vol I issue 3
Vol I issue 4
Error in display of faulty ROMs for 80 column PET diagnostic program
Field upgrade of 80 column PET
Vol I issue 5
Changing device numbers on 2022, 2023 and 2040 floppy disks
Issue 1, 1984: Datasette 1 - Model: 1530, 1531 (1 page, original)
Issue 3, 1984: Disk drive 2 - Model: 1541 (1 page, copied)
Issue 5, 1984: Computer 2 - Model: C16 (3 pages, original)
Troubleshooting Aides
Issue 6, 1984: Computer 3 - Model: PLUS 4 (4 pages, original)
Troubleshooting Aides
Issue 7, 1984: Computer 4 - Model: C16, Plus 4 (1 page, original)
Line definitions
Issue 1, 1985: Monitor 1 - Model: 1702 (8 pages, copied)
Issue 2, 1985: Tid-Bits (2 pages, copied)
C-64 Diagnostic
Diagnostic disk manual - Version 2.0
VIC 20 diagnostic
1526 MPS802 4023 service manual
C-64 service manual Enclosed: updated page 4 of Feb 1985 service manual (1 page, copied)
Parts orders
Plus 4 and C-16 repairs
Issue 3, 1985: Monitor 2 - Models: 1701, 1702
Issue 4, 1985: Disk Drive 1 - Model: SFD 1001 (1 page, copied)
Issue 5, 1985: Tid-Bits 2 (1 page, copied)
SFD 1001 disk drives
Computer PCB replacement - C-64, C-16, VIC 20, Plus 4
Drive assembly exchanges CQS exchange program - Monitors, Printers, SX-64
Service manuals
Issue 6, 1985: Computer 1 - Model: C-64, C-16, Plus 4 (1 page, copied)
Issue 7, 1985: Computer 2 - Model: CBM B-model (1 page, copied)
Issue 8, 1985: Printer 1 - Model: 1520 plotter (1 page, copied)
Issue 9, 1985: Computer 3 - Model: C-128 (1 pages, copied)
- Update
- C-128 diagnostic
- Attachment: Updated pages 65 and 66 of C128 service manual
Issue 10, 1985: Disk Drive 2 - Model: 1571
Issue 11, 1985: Disk Drive 3 - Model: 1541 "B" (1 page, original)
- Attachment: Parts list PCB assembly #250448, page 33A for the 1540/1541 service manual (1 page, original)
- Attachment: Schematic 1541B, page 33B for the 1540/1541 service manual
Issue 13, 1985: Monitor 4 - Model: 1802/CM 141 (6 pages, original)
Replacement parts list
Issue 14, 1985: Computer 4 - Model: C-16 and Plus 4
Issue 15, 1985: Disk Drive 4 - Model: 1541 (1 page, copied)
Common failure symptom: drive runs continuously
Special technical update 12/17/86 (1 double sided page, copied)
SX64 power supply problems
Issue 16, Jan 87
- Enclosure - 1351 Mouse schematics (5 pages, original)
  Includes description of the MICKEY183 18 pin CMOS Gate Array (MOS 5717)
- Enclosure - C128 ROM Revisions (4 pages, original)
Issue 17
- Amiga Techtopics (2 pages, copied)
  - I - Amiga enclosures included in this issue
    - 1) Enclosed please find first release of the new A500 Service Manual, part number 314981-01
    - 2) Reference Schematics A500 Power Supplies - Speedy Tech and Dee Van types
    - 3) Enclosed please find first release of the new A1300 Service Manual, part number 314983-01
    - 4) Amiga Field Service Training Update (included)
    - 5) Important Genlock Warranty Information (included)
    - 6) 1902 to 1080 Conversion (included)
    - 7) A500/A2000 Technical Reference Manual
- PC10 Techtopics
  - II - PC10 enclosures included in this issue
    - 1) Enclosed please find first release of the new 1901 Mono Chrome Monitor Service Manual, part number 314970-01
    - 2) Enclosed please find PC10 Hard Drive Mounting Diagram
    - 3) PC10 Hard Drive Mounting Instructions
    - 4) PC10 Diagnostic Information
    - 5) Drive Select and Bus Termination on PC Drives
- Commodore Techtopics
  - III - Commdore consumer product enclosures included in this issue
    - 1) Enclosed please find first release of the new C128D Service Manual Addendum. This section should be added to the C128 Service Manual. The part number for this manual is 314980-01.
    - 2) C128D Diagnostic Update Information
    - 3) Reference Schematics for C128 Power Supplies
    - 4) Enclosed please find first release of new 1581 Service Manual, part number 314982-01.
    - 5) 1581 Servce Information
    - 6) C64 Diagnostic Assembly Update Information
    - 7) 1802/1802C Monitor Schematics (2 pages: 1 original, 1 copied)
    - 8) Modem Exchange Information
    - 9) Enclosed please find new MPS 803 Service Manual, part number 314003-05.
    - 10) Enclosed please find C64E PCB Schematic
    - 11) Special note
- Service parts
  - IV - Service parts update
    - 1) Parts list erratus
    - 2) Parts list additions
Issue 18, 11/87
- 1 Info
  - 1-1.1: Current warranty labor rate
  - 1-1.2: Attachment: 18/1-1.2 New warranty rates (included)
  - 1-2.1: Change of address
  - 1-3.1: New address for NARDA forms
  - 1-4.1: VIC 20 PCB assy return policy
  - 1-5.1: Tech hot line usage
- 2 Parts
  - 2-1.1: Parts erratus and additions, reprint from issue 17
  - 2-2.1: A2000 parts additions
  - 2-3.1: A2088, A2052, A2090 parts additions
  - 2-4.1: 1802 Goldstar monitor parts additions
  - 2-4.2: Enclosure: 18/2-4.2 1802 monitor service manual parts list (11 pages, original)
  - 2-5.1: 1802C Daewoo monitor parts additions
  - 2-5.2: Enclosure: 18/2-5.2 1802C monitor service manual parts list (13 pages, original)
  - 2-6.1: Parts update - issue 18, Now 87
- 3 Amiga
  - 3-1.1: A2000 system schematics
  - 3-1.2: Enclosure: 18/3-1.2 PN 314135-01 A2000 system schematics
  - 3-2.1: A500/A2000 alignment instructions
  - 3-2.2: Enclosure: 18/3-2.2 Amiga alignment instructions sheet
  - 3-2.3: Enclosure: 18/3-2.3 PN 314966-02 alignment program diskette V1.1
  - 3-3.1: 1902 to 1080 conversion erratus
  - 3-4.1: Fix - A1000 keyboard
  - 3-5.1: Repair tip: IC/Socket contact problems
- 4 CBM Section
  - 4-1.1: 1581 FDD repair tip
  - 4-2.1: Erratus: C128D board layout
  - 4-2.2: Enclosure: 18/4-2.2 C128D board layout for PCB Assy # 250477
  - 4-3.1: C64C addendum: B-3, E versions
  - 4-3.2: Enclosure: 18/4-3.2 C64C addendum PN # 314856-01 (14 pages, copied)
  - 4-4.1: C128/C128D diagnostic EEPROM
  - 4-4.2: Enclosure: 18/4-4.2 C128/C128D diagnostic EEPROM
- 5 PC Section (5 pages, original)
  - 5-1.1: Installation tip: ATI video card
  - 5-1.2: Reprint: page 53 PC operators manual (included)
  - 5-1.3: Reprint: page 30 PC operators manual (included)
  - 5-2.1: Repair tip: parity errors
  - 5-3.1: Compute effective address
  - 5-4.1: PC10 (1-2-III) disk drive diagnostic
  - 5-5.1: PC10-1, PC10-2 memory map
- 6 CSIN (1 page, original)
  - 6-1.1: Commodore Service Information Network preview
Issue 19, Dec 1987
- 1 Info (2 pages, original)
  - 1-0.0: Info section index
  - 1-1.1: Attachment: letter from vice president of service (1 page, copied)
  - 1-2.1: Attachment: service telephone directory for 1988
  - 1-3.1: Attachment: quick reference sheet (1 page, copied)
  - 1-4.1: Notice of annual subscription automatic billing
  - 1-5.1: Attachment: return mail form (included)
- 2 Parts (1 pages, original)
  - 2-0.0: Parts section index
  - 2-2.1: Parts update - issue 19, december 1987
  - 2-3.1: Imrpoved parts deliveries to west coast
  - 2-4.1: Parts department - closed january 3, 4 and 5
- 3 Amiga (2 pages, original)
  - 3-0.0: Amiga section index
  - 3-1.1: Repait policy: A1060 sidecar
  - 3-2.1: Amiga startup sequence - Kickstart V1.2
  - 3-3.1: A2000 keyboard fix - Hitek type
  - 3-4.1: Modification: A2088 XT emul - use ext 1020 as drive A:
- 5 PC Section (3 pages, original)
  - 5-0.0: PC section index
  - 5-1.1: BIOS self test diagnostics
Issue 20, March 1988 (20 pages, original)
- 1 Info
  - 1-0.0: Index
  - 1-1.1: No credit issued for non-repairable parts
  - 1-2.1: Installation of hardware add-on kits for end users
  - 1-3.1: In warranty repait requirements
  - 1-4.1: Commodore service policy
  - 1-5.1: Test systems available to service centers
- 2 Parts
  - 2-0.0: Index
  - 2-1.1: Current service kit contents
  - 2-2.1: Parts update - issue 20, march 1988
- 3 Amiga
  - 3-0.0: Index
  - 3-1.1: A2000 system clock fix
  - 3-1.2: Attachment - A2000 power supply reference schematic (included)
  - 3-1.3: Attachment - A2000 power supply board layout (included)
  - 3-2.1: Flat pack chip extractor
  - 3-3.1: A1020 disk drive fix for A500 operations
  - 3-3.2: Attachment - A1020 disk drive schematic # 328171 (included)
- 4 CBM
  - 4-0.0: Index
  - 4-1.1: 1541-II service manual addendum # 314861-01
  - 4-1.2: Enclosure: 20/4-1.2 - 1541-II addendum
  - 4-2.1: 1750/1764 schematics # 312534 / 311752
  - 4-2.2: Enclosure: 20/4-2.2 - 1750/1764 schematics
  - 4-3.1: 1084 monitor schematics - OEM reference
  - 4-3.2: Enclosure: 20/4-3.2 - 1084 monitor schematics
  - 4-4.1: New diagnostic - 1571/128D manual w/ disk
  - 4-5.1: 1581 floppy disk controller 1772 - availability
  - 4-6.1: C64 B3 PCB exchange
- 5 PC
  - 5-0.0: Index
  - 5-1.1: PC10-III service manual addendum # 314859-01
  - 5-1.2: Enclosure: 20/5-1.2 - PC10-III addendum
Issue 21, June 88 (17 pages, original)
- 1 Info
  - 21/1-0.0: Index
  - 21/1-1.1: Warranty claim processing
  - 21/1-2.1: Service training schedule
  - 21/1-3.1: Welcome new service technicians
- 2 Parts
  - 21/2-0.0: Index
  - 21/2-1.1: Parts back order status
  - 21/2-2.1: New service parts price book 1988
  - 21/2-3.1: Parts price book erratus #1
  - 21/2-4.1: C64 power supply special sale
  - 21/2-5.1: Parts price increase effective oct. 1
- 3 Amiga
  - 21/3-0.0: Index
  - 21/3-1.1: Erratus 20/3-3.2 A1020 disk drive fix
  - 21/3-1.2: A1020 operations using AmigaDOS
  - 21/3-1.3: A1020 operations using MSDOS (Trans V1.2)
  - 21/3-2.1: A2300 genlock technical specifications
  - 21/3-2.2: Enclosure: E21/3-2.2 - A2300 tech specs.
- 4 CBM
  - 21/4-0.0: Index
  - 21/4-1.1: New diagnostic disk 1571/128D
  - 21/4-2.1: 1802 monitor - warranty fix
  - 21/4-3.1: 1084 monitor service manual - Philips type
  - 21/4-3.2: Enclosure: E21/4-3.2 1084 service manual # 314890-01
  - 21/4-4.1: 1802 monitor service manual - Daewoo type
  - 21/4-4.2: Enclosure: E21/4-4.2 1802 service manual # 602155-85
- 5 PC Section
  - 21/5-1.1: PC10/Colt Diag prog V2.0 diskette
  - 21/5-2.1: PC10-III Power supply schematic
  - 21/5-2.2: Enclosure: E21/5-2.1 - PC10-III Power supply schematic (included)
  - 21/5-3.1: PC10-III keyboard schematic
  - 21/5-3.2: Enclosure: E21/5-3.2 - PC10-III keyboard schematic (included)
- 6 C-TOC
  - 21/6-0.0: Index
  - 21/6-1.1: C-TOC introduction
Issue 22, October 88 (15 pages, original)
- 1 Info
  - 22/1-0.0: Index
  - 22/1-1.1: Past due accounts
  - 22/1-2.1: October training special
  - 22/1-3.1: Double-up discounts for 5-day courses
  - 22/1-4.1: Current service for Pennsylvania
  - 22/1-5.1: 800 service for Pennsylvania
  - 22/1-6.1: Sales companies return authorization policy change
- 2 Parts
  - 22/2-0.0: Index
  - 22/2-1.1: Parts price increase effective oct. 1
  - 22/2-2.1: C64 power supply special sale
  - 22/2-3.1: A2090, A2052, A2088 PCB dealer billing
- 3 Amiga
  - 22/3-0.0: Index
  - 22/3-1.1: Fat Agnus socket specifications
  - 22/3-2.1: Flat pack IC chip extractor
  - 22/3-3.1: A1020 operations addendum
  - 22/3-4.1: A2090A tech data manual
  - 22/3-4.2: Enclosure: E22/3-4.2 A2090A PN# 314880-01
  - 22/3-5.1: A2058 tech data manual
  - 22/3-5.2: Enclosure: E22/3-5.2 A2058 PN# 314881-01
- 4 CBM
  - 22/4-0.0: Index
  - 22/4-1.1: C128D ROM release notes
  - 22/4-2.1: 1084 Philips monitor cables
  - 22/4-3.1: 1541-II PCB-drive assy reference
- 5 PC
  - 22/5-0.0: Index
  - 22/5-1.1: PC10-III, PC20-III, Colt memory map
  - 22/5-2.1: PC10-III, PC20-III, Colt CBM 8088 monitor
  - 22/5-3.1: PC10, Colt BIOS 4.36 release notes
- 6 C-TOC
  - 22/6-0.0: Index
  - 22/6-1.1: Update information for authorized users
Issue 23, December 88 (1 page, copied)
- 1 Info (3 pages: 1 page, copied, 2 pages missing)
  - 23/1-0.0: Index
  - 23/1-1.1: Warranty claims, NARDA forms
  - 23/1-2.1: No credit for non-repairable units
  - 23/1-3.1: Overcharges by service centers
  - 23/1-4.1: Service training schedule for 1989, jan thru jun
  - 23/1-5.1: Techtopics subscriptions for 1989
  - 23/1-6.1: Warranty labor rate increase effective jan. 1989
- 2 Parts (1 page, original)
  - 23/2-0.0: Index
  - 23/2-1.1: Update for yellow parts price book
- 3 Amiga (1 page, copied)
  - 23/3-0.0: Index
  - 23/3-1.1: Operations notes - 1.3 Amiga Workbench
- 4 CBM (1 page, copied)
  - 23/4-0.0: Index
  - 23/4-1.1: 1084S-P line output transformer (T402)
  - 23/4-2.1: C64C MPU 8500 for type E PCB only
- 5 PC (1 page copied)
  - 23/5-0.0: Index
  - 23/5-1.1: PC drive add-on kits available from parts
- Attachments
  - 1) Service telephone directory 1989 (missing)
  - 2) Service quick reference sheet 1989 (missing)
  - 3) Warranty labor rates 1989 (missing)
  - 4) 1989 service training schedule (missing)
  - 5) Commodore stocked parts - 1084S-P (1 page, copied)
Issue 24, January - March 1989
- 1 Info
  - 24/1-0.0: Index
  - 24/1-1.1: Service training schedule for 1989, april thru june
  - 24/1-2.1: Warranty labor for card replacement
- 2 Parts
  - 24/2-0.0: Index
  - 24/2-1.1: Update #2 for yellow parts price book
  - 24/2-2.1: Update #3 for yellow parts price book
- 3 Amiga
  - 24/3-0.0: Index
  - 24/3-1.1: Using A2090A with 1.3 Workbench and 1.2 ROM
  - 24/3-2.1: 3.5 floppy diskette media
  - 24/3-3.1: A2000 74ALS245 bus transceiver resistor
  - 24/3-4.1: A500/A2000 system test release
  - 24/3-4.2: Enclosure: A500/A2000 systest program diskette 314879-01
  - 24/3-4.3: Attachment: A500/A2000 systest instructions
- 4 CBM
  - 24/4-0.0: Index
  - 24/4-1.1: No credit for 5 pin video C64
  - 24/4-2.1: C64C VIC chips - NTSC and PAL
  - 24/4-3.1: 1084S-D monitor service manual release
  - 24/4-4.1: Enclosure: 1084S-D monitor service manual 314996-01
- 5 PC
  - 24/5-0.0: Index
  - 24/5-1.1: Auto-config - third party mouses
  - 24/5-2.1: PC40-III service manual release
  - 24/5-3.1: Enclosure: PC40-III service manual 314134-01
- 6 C-TOC
  - 24/6-0.0: Index
  - 24/6-1.1: Extended CTOC services - past bulletins accessible by model
Issue 25, April - June 1989
- 1 Info
  - 25/1-0.0: Index
  - 25/1-1.1: Service training schedule for 1989, april thru june.
  - 25/1-2.1: Important change - minimum parts order of $50.00 eliminated.
  - 25/1-3.1: Extended C-TOC services - past bulletins accessible by model.
  - 25/1-4.1: Service training schedule for 1989, july thru december.
  - 25/1-5.1: Points for parts program, starts july 1, 1989.
  - 25/1-6.1: Return of defective parts to parts depot.
  - 25/1-7.1: Warranty extensions for customer units - new procedures.
  - 25/1-8.1: McGraw-Hill CBM products warrantys are valid and to be honored.
  - 25/1-9.1: Past due accounts results cancelled parts orders.
- 2 Parts
  - 25/2-0.0: Index
  - 25/2-1.1: Update #4 for yellow parts price book.
  - 25/2-2.1: Parts list by unit - new on-line feature in parts secton.
  - 25/2-3.1: New "fatter" Agnus 8372 - W/ 1Mb chip RAM available soon.
  - 25/2-4.1: A2000 revision 6 PCB part number.
- 3 Amiga
  - 25/3-0.0: Index
  - 25/3-1.1: A2000 PCB field upgrade to revision level 4.5.
  - 25/3-2.1: Installation of new "fatter" Agnus in the Amiga 2000.
  - 25/3-3.1: A2000 guru message on power up /w rev 6 PCB.
  - 25/3-4.1: A2286 rev 6.1 to rev 8.1 board exchange
- 4 CBM
  - 25/4-0.0: Index
  - 25/4-1.1: C64C - E type PCB assemblies video problems.
  - 25/4-2.1: 1451B - resistor change, Alps or Newtronics type drive
  - 25/4-3.1: R/W hybrid IC, PN#251853 is not interchangable for 1541B/1571
- 5 PC
  - 25/5-0.0: Index
  - 25/5-1.1: PC40-III video repair tip: IC/socket contact problems
- Techtopics issue # 25 erratus
Issue 26, July - September 1989
- 1 Info
  - 26/1-0.0: Index
  - 26/1-1.1: Service training schedule, october - december 1989.
  - 26/1-2.1: Important warranty policy information.
- 2 Parts
  - 26/2-0.0: Index
  - 26/2-1.1: New service parts price book - September 1, 1989.
  - 26/2-2.1: New major component kits available October.
  - 26/2-3.1: New Amiga IC repair kit 314067-03 kit.
  - 26/2-4.1: Erratus #1 - parts price book issued Sept. 1, 1989.
- 3 Amiga
  - 26/3-0.0: Index
  - 26/3-1.1: A2286 rev 6.1 to rev 8.1 board exchange.
  - 26/3-2.1: A2000 PCB field upgrade to rev 4.5.
  - 26/3-3.1: A2620 coprocessor ROM upgrade.
  - 26/3-4.1: A2000 CR rev 6.0 PCB expansion bus problems.
  - 26/3-5.1: A2000 power supply - 12 Volt load can effect video.
  - 26/3-6.1: A590 service manual CBM PN# 314899-01 release.
  - 26/3-6.2: Enclosure: A590 service manual.
  - 26/3-7.1: A500 revision 6A/7 schematics CBM PN# 314981-02 release.
  - 26/3-7.2: Enclosure: A500 rev 6A/7 schematics.
  - 26/3-8.1: A2000 revision 6 schematics CBM PN# 314135-02 release.
  - 26/3-8.2: Enclosure: A2000 rev 6 schematics.
- 4 CBM
  - 26/4-0.0: Index
  - 26/4-1.1: C64/A PCB# 250407 will have no DUD value as of 10/01/89.
  - 26/4-2.1: 1581 FDD - extended warranty no longer in effect.
  - 26/4-3.1: 1230 printer service manual CBM PN# 314998-01 release.
  - 26/4-3.2: Enclosure: 1230 printer service manual.
- 5 PC
  - 26/5-0.0: Index
  - 26/5-1.1: PC10-III rev 6 PCB assembly - expansion bus problems.
  - 26/5-2.1: PC30/40-III VGA video problem in 8MHz mode.
  - 26/5-3.1: PC40-III BIOS V2.01 upgrade ROM release.
  - 26/5-4.1: PC40-III diagnostic kit - contents change.
  - 26/5-5.1: PC40-III PCB exchange kit.
  - 26/5-6.1: 1402 monitor service manual CBM PN# 602249-99 release.
  - 26/5-6.2: Enclosure: 1402 monitor service manual.
  - 26/5-7.1: 1403 monitor service manual CBM PN# 314882-01 release.
  - 26/5-7.2: Enclosure: 1403 monitor service manual.
Issue 27, October - December 1989
- 1 Info
  - 27/1-0.0: Index
  - 27/1-1.1: Service training schedule, October - December 1989.
  - 27/1-2.1: Service training schedule, January - June 1990.
  - 27/1-2.2: Enclosure: 1990 service training course outline.
  - 27/1-3.1: Service training points for parts certificates mailed.
- 2 Parts
  - 27/2-0.0: Index
  - 27/2-1.1: C-64 power supply special sale.
  - 27/2-2.1: Level 1 repair kits now available.
  - 27/2-3.1: Erratus #2 - parts price book issued Sept. 1, 1989.
- 3 Amiga
  - 27/3-0.0: Index
  - 27/3-1.1: A2000 rev6.0 and rev6.1 boards.
  - 27/3-2.1: A2000 CR rev 6.0 PCB expansion bus problems.
  - 27/3-3.1: A2000 power supply - 12 Volts load can effect video.
  - 27/3-4.1: A2620/A2630 coprocessor new ROM upgrade.
  - 27/3-5.1: A590 fast file system update.
  - 27/3-6.1: A2286 upgrade ROMs V3.6 and PAL chips
  - 27/3-7.1: A2088 upgrade ROM
  - 27/3-8.1: A2091 memory auto-configuration limitations.
  - 27/3-9.1: A2630 system schematics, CBM PN# 314033-01 release.
  - 27/3-9.2: Enclosure: A2630 system schematics.
  - 27/3-10.1: A2620/A2630 IC memory 262,144 address X 4 bit DRAM.
- 4 CBM
  - 27/4-0.0: Index
  - 27/4-1.1: C64/A PCB# 250407 will have no DUD value as of 10/01/89.
  - 27/4-2.1: 1581 FDD - extended warranty no longer in effect.
  - 27/4-3.1: Warranty claims for C64 A-type PCB's
- 5 PC
  - 27/5-0.0: Index
  - 27/5-1.1: PC40-III Quantum harddrive upgrade.
  - 27/5-2.1: Colt 286 service manual, CBM PN# 314118-02 release.
  - 27/5-3.1: Enclosure: Colt 286 service manual.
Issue 28 January - March 1990 (17 pages, copied)
- 1 Info
  - 28/1-0.0: Index
  - 28/1-1.1: Service training schedule, January - June 1990.
  - 28/1-2.1: Service warranty policy numbers and conditions.
- 2 Parts
  - 28/2-0.0: Index
  - 28/2-1.1: Erratus #2 - parts price book issued Sept. 1, 1989.
  - 28/2-2.1: A2091 spare parts list.
- 3 Amiga
  - 28/3-0.0: Index
  - 28/3-1.1: A2620/A2630 coprocessor new ROM upgrade.
  - 28/3-2.1: A590 fast file system update.
  - 28/3-3.1: A2286 upgrade ROMs V3.6 and PAL chips.
  - 28/3-4.1: A2088 upgrade ROM.
  - 28/3-5.1: A2091 memory auto-configuration limitations.
  - 28/3-6.1: A2620/A2630 IC memory 262,144 address X 4 bit DRAM.
  - 28/3-7.1: A2091 IC memory 262,144 address X 4 bit DRAM.
  - 28/3-8.1: A2091 HDC - power cable and data cable availability.
  - 28/3-9.1: Important notice - Amiga 1000 keyboards.
  - 28/3-10.1: A2091 ROM upgrade to revision 6.1.
  - 28/3-11.1: A590 ROM upgrade to revision 6.1.
  - 28/3-12.1: Kit A590 HDD exchange (Epson HM755 to WD93028-X-A).
  - 28/3-13.1: A2091 system schematics, CBM PN# 314674-01 release.
  - 28/3-13.2: Enclosure: A2091 system schematics.
- 4 CBM
  - 28/4-0.0: Index
  - 28/4-1.1: Warranty claims for C64 A-type PCB's.
  - 28/4-2.1: Warranty claims for discontinued Commodore products.
- 5 PC
  - 28/5-0.0: Index
  - 28/5-1.1: 915 3.5" floppy disk drive configuration.
  - 28/5-2.1: BIOS ROM rev 4.38 upgrade - PC10-III, PC20-III, Colt.
  - 28/5-3.1: Coprocessor circuit modification - PC30-III/Colt286.
  - 28/5-4.1: PC40-III PCB revision 8.x - DMA channel 7 acknowledge signal.
Issue 29 April - June 1990 (25 pages, original; front page copied)
- 1 Info
  - 29/1-0.0: Index
  - 29/1-1.1: Service warranty policy numbers and conditions.
  - 29/1-2.1: Service training schedule, July thru September 1990.
  - 29/1-2.2: Enclosure: July thru September service training course. (included)
  - 29/1-3.1: Amiga CPU one year warranty.
  - 29/1-4.1: Amiga accessories one year warranty.
- 2 Parts
  - 29/2-0.0: Index
  - 29/2-1.1: A2091 spare parts list.
  - 29/2-2.1: New level 1 repair kit - PN 314032-21, includes A2091 and A2630.
  - 29/2-3.1: Rodime 40Mb hard drive sub to Quantum 40Mb hard drive.
  - 29/2-4.1: A3000 spare parts list
  - Corrected page: section 2 page 3
- 3 Amiga
  - 29/3-0.0: Index
  - 29/3-1.1: A2091 memory auto-configuration limitations.
  - 29/3-2.1: A2091 IC memory 262,144 address X 4 bit DRAM.
  - 29/3-3.1: A2091 HDC - power cable and data cable availability.
  - 29/3-4.1: A2091 ROM upgrade to revision 6.1.
  - 29/3-5.1: A590 ROM upgrade to revision 6.1.
  - 29/3-6.1: A590 HDD exchange kit (Epson HM755 to WD93028).
  - 29/3-7.1: A2286 problem with setup menu.
  - 29/3-8.1: A3000 system schematics, CBM PN# 314677-02.
  - 29/3-8.2: Enclosure: A3000 system schematics.
  - 29/3-9.1: A2300 genlock fix to work with A3000.
  - 29/3-10.1: A2300 use with A1950 monitor.
  - 29/3-11.1: A2091 hard drive controller - problem with two devices.
  - 29/3-12.1: Rodime 40Mb hard drive sub to Quantum 40Mb hard drive.
  - 29/3-13.1: A3000 warranty labor rates - June 1990.
  - 29/3-14.1: A3000 second floppy drive configuration.
  - 29/3-15.1: 1950 system schematics, CBM PN# 314036-01.
  - 29/3-15.2: Enclosure: 1950 system schematics.
- 4 CBM
  - 29/4-0.0: Index
  - 29/4-1.1: Warranty claims for discontinued Commodore products.
  - 29/4-2.1: 1571 drive assemblies - Alps and Newtronics.
- 5 PC
  - 29/5-0.0: Index
  - 29/5-1.1: Coprocessor circuit modification - PC30-III/Colt286.
    Warranty policy number - WPC30-0590.
  - 29/5-2.1: PC40-III PCB revision 8.X - DMA channel 7 acknowledge signal.
Issue 30 July - September 1990 (19 pages, copied)
- 1 Info
  - 30/1-0.0: Index
  - 30/1-1.1: Service warranty policy numbers and conditions.
  - 30/1-2.1: Service training schedule, October thru December 1990.
  - 30/1-2.2: Enclosure: October thru December service training course outline. (included)
  - 30/1-3.1: Amiga CPU one year warranty.
  - 30/1-4.1: Amiga accessories one year warranty.
  - 30/1-5.1: A3000 - PC60-III, Field Replacement Units Policy.
- 2 Parts
  - 30/2-0.0: Index
  - 30/2-1.1: Rodime 40Mb Hard Drive sub to Quantum 40Mb Hard Drive.
  - 30/2-2.1: A3000 spare parts list.
- 3 Amiga
  - 30/3-0.0: Index
  - 30/3-1.1: A2091 Memory auto-configuration limitations.
  - 30/3-2.1: A2286 Problem with setup menu.
  - 30/3-3.1: A2300 genlock fix to work with A3000.
  - 30/3-3.2: Correction of, A2300 Genlock fix to work with A3000.
  - 30/3-4.1: Rodime 40Mb Hard Drive sub to Quantum 40Mb Hard Drive.
  - 30/3-5.1: A3000 second floppy drive configuration.
  - 30/3-6.1: A2300 Demo disk replacement.
  - 30/3-7.1: Genlock problem with A2000.
  - 30/3-8.1: One Megabyte Agnus use in Commodore A5000 Computers.
  - 30/3-9.1: A2060/A2065/A2232 System Schematics, CBM PN# 314042-01.
  - 30/3-9.2: Enclosure: A2060/A2065/A2232 System Schematics.
- 4 CBM
  - 30/4-0.0: Index
  - 30/4-1.1: 1571 Drive Assemblies - Alps and Newtronics.
- 5 PC
  - 30/5-0.0: Index
  - 30/5-1.1: PC40-III PCB revision 8.x - DMA channel 7 acknowledge signal.
  - 30/5-2.1: PC60-III Techtips.
  - 30/5-3.1: 1930 VGA Color Monitor System Schematics, CBM PN# 314255-01.
  - 30/5-3.2: Enclosure: 1930 VGA Color Monitor System Schematics.
Issue 31 October - December 1990
- 1 Info
  - 31/1-0.0: Index
  - 31/1-1.1: Service Warranty Policy Numbers and Conditions.
  - 31/1-2.1: Service Training Schedule, January thru March 1991.
  - 31/1-2.2: Enclosure: January thru March Service Training Course Outline.
  - 31/1-3.1: A3000 - PC60-III, Field Replacement Units Policy. (Reminder)
- 2 Parts
  - 31/2-0.0: Index
  - 31/2-1.1: PC60-III Spare Parts List.
- 3 Amiga
  - 31/3-0.0: Index
  - 31/3-1.1: Addendum To Techtopic Issue 30-3-3.1, A2300 Genlock Fix To Work With A3000.
  - 31/3-2.1: Quantum Prodrive Hard Disk Drive Update.
  - 31/3-3.1: Using Setclock Command After Changing Clock Chip Or Battery.
- 4 CBM
  - 31/4-0.0: Index
  - 31/4-1.1: 1541B Kit Substitution.
  - 31/4-2.1: 1270 Ink Jet Service Manual, CBM PN# 314260-01 Release.
  - 31/4-2.2: Enclosure: 1270 Ink Jet Service Manual.
- 5 PC
  - 31/5-0.0: Index
  - 31/5-1.1: C286-LT Laptop Computer Announcement.
  - 31/5-2.1: BIOS ROMS Rev. 2.03 Upgrade - PC40/30-III.
  - 31/5-3.1: BIOS ROMS Rev. 1.35 Upgrade - PC60-III.
  - 31/5-4.1: C286-LT Laptop Computer Service Manual, CBM PN# 400400-01 Release.
  - 31/5-4.2: Enclosure: C286-LT Laptop Computer Service Manual.
Issue 32 April 1991 (18 pages, copied)
- 1 Info
  - 32/1-0.0: Index
  - 32/1-1.1: Details of New Professional Systems Service Plan.
  - 32/1-2.1: New FRU Pricing & Labor Rates.
  - 32/1-3.1: New ABCD Form & Instructions.
  - 32/1-3.2: Enclosure: Sample ABCD Warranty Claim Forms w/ Instructions.
  - 32/1.4.1: Monitor Warranty Policy.
- 2 Parts
  - 32/2-0.0: Index
  - 32/2-1.1: Field Replacecable Unit Pricing - Out of Warranty.
- 3 Amiga
  - 32/3-0.0: Index
  - 32/3-1.1: A2320 Display Enhancer - Field Serive Bulletin #A02.
  - 32/3-2.1: A590 Hard Drives - Grounding on Power Connectors, CN7, CN7A.
  - 32/3-3.1: A2091 HDC - New Rom Rev 6.6 corrects Dual SCSI problem on PCB's with WD SCSI Controller type A, Revisions 04/08.
  - 32/3-4.1: A2000 - Techtip - Mouse Problems, Check Fuse, F1.
  - 32/3-5.1: A2286 AT Bridgeboard - Use in A3000 Systems.
- 4 CBM
  - 32/4-0.0: Index
  - 32/4-1.1: 1802 Monitor - Techtip - No Color, Check R225.
- 5 PC
  - 32/5-0.0: Index
  - 32/5-1.1: SL386SX - Configuration RAM in Setup.
Service bulletin July 1, 1992
Service bulletin September 23, 1992
Service bulletin October 30, 1992

Note: some of these Techtopics are for sale.