Commodore Techtopics

The TECHTOPICS BULLETIN has been developed to inform the dealer network about special troubles and corrections to the Commodore Systems. TECHTOPICS will be a monthly bulletin directed to the Service Centers of the dealerships.

Introduction to TechTopics, Techtopics Vol I issue 1

The information enclosed in a brightly colored envelope marked with the phrase "Technical Information Enclosed" should be given directly to the Head Technician. The technical updates that you will find inside are part of our effort to improve our communication and your service ability as it relates to our product line. Do not forget, the TECHTOPICS belong in the hands of the servicing technicians.

General information, CQS Newsletter May 1, 1985

Index

Vol I issue 1 (2 pages)

Introduction to TechTopics
2001 series

Vol I issue 2 (1 page)

Read errors on 2040 floppy drive

Vol I issue 3 (1 page)
Vol I issue 4 (2 pages)

Error in display of faulty ROMs for 80 column PET diagnostic program
Field upgrade of 80 column PET

Vol I issue 5 (1 page)

Changing device numbers on 2022, 2023 and 2040 floppy disks

Vol I issue 12 (≥1 pages)

Caution in use of disk I.D's

Issue 1, 1984: Datasette 1 - Model: 1530, 1531 (1 page)
Issue 2, 1984: Disk drive 1 - Model: 1541 (1 page)
Issue 3, 1984: Disk drive 2 - Model: 1541 (1 page)
Issue 4, 1984: Computer 1 - Model: C-64 (1 page)
Issue 5, 1984: Computer 2 - Model: C16 (3 pages)

Troubleshooting Aides

Issue 6, 1984: Computer 3 - Model: PLUS 4 (4 pages)

Troubleshooting Aides

Issue 7, 1984: Computer 4 - Model: C16, Plus 4 (1 page)

Line definitions

Issue 1, 1985: Monitor 1 - Model: 1702 (8 pages)
Issue 2, 1985: Tid-Bits (2 pages)

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)

Parts orders
Plus 4 and C-16 repairs
Listing of available kits (1 page)

Issue 3, 1985: Monitor 2 - Models: 1701, 1702 (2 pages)
Issue 4, 1985: Disk Drive 1 - Model: SFD 1001 (1 page)
Issue 5, 1985: Tid-Bits 2 (2 pages)

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)

Schematics for C-64, C-16, Plus 4

Issue 7, 1985: Computer 2 - Model: CBM B-model (1 page)

Parts list corrections

Issue 8, 1985: Printer 1 - Model: 1520 plotter (1 page)
Issue 9, 1985: Computer 3 - Model: C-128 (2 pages)

Update
C-128 diagnostic
Attachment: Updated pages 65 and 66 of C128 service manual (2 pages)

Issue 10, 1985: Disk Drive 2 - Model: 1571 (1 page)

Diagnostic disk and manual

Issue 11, 1985: Disk Drive 3 - Model: 1541 "B" (1 page)

Attachment: Parts list PCB assembly #250448, page 33A for the 1540/1541 service manual (1 page)
Attachment: Schematic 1541B, page 33B for the 1540/1541 service manual (1 page)

Issue 12, 1985: Monitor 3 - Model: 1701/1702/1802/CM 141/1902 (1 page)

CQS center monitor repairs

Issue 13, 1985: Monitor 4 - Model: 1802/CM 141 (6 pages)

Replacement parts list

Issue 14, 1985: Computer 4 - Model: C-16 and Plus 4 (1 page)
Issue 15, 1985: Disk Drive 4 - Model: 1541 (1 page)

Common failure symptom: drive runs continuously

Included in CQS Field Service Newsletter Issue 5 - December 1986:

Section 4 - Techtopics (2 pages)

Technical and training information
Amiga Disk Drive Alignment Kit
1541 Rev B PCB installation instructions

Special technical update 12/17/86 (2 pages)

SX64 power supply problems

Issue 16, Jan 87 (3 pages)

Enclosures in this issue

1) 1351 Mouse schematics (5 pages)
2) C128 ROM Revisions (4 pages)
3) C64 B3 PCB Schematics (≥1 pages)

Service Manuals in this issue
Reminder to CQS centers
Corrections to telephone listings
VIC exchange kit - part number 314975-01
C128 diagnostoc EPROM update
New checksum table for C128 diagnostic manual
C128 ROM update kit - part number 314972-01
PC10 hard drive mounting accessories kit - part number 314976-01
C64 reset modification on old 5 pin PCB's

Issue 17

Amiga Techtopics (2 pages)

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 (2 pages)
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 (4 pages)

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 (included)
3) PC10 Hard Drive Mounting Instructions (included)
4) PC10 Diagnostic Information
5) Drive Select and Bus Termination on PC Drives (included)

Commodore Techtopics (3 pages)

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. (18 pages)
2) C128D Diagnostic Update Information
3) Reference Schematics for C128 Power Supplies (≥1 pages)
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)
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 (2 pages)

IV - Service parts update

1) Parts list erratus
2) Parts list additions

Issue 18, Nov 87 (1 page)

1 Info (2 pages)

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 (8 pages)

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)
2-5.1: 1802C Daewoo monitor parts additions
2-5.2: Enclosure: 18/2-5.2 1802C monitor service manual parts list (13 pages)
2-6.1: Parts update - issue 18, Nov 87

3 Amiga (3 pages)

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 (9 pages)
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 (2 pages)

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 (1 page)
4-3.1: C64C addendum: B-3, E versions
4-3.2: Enclosure: 18/4-3.2 C64C addendum PN # 314856-01 (14 pages)
4-4.1: C128/C128D diagnostic EEPROM
4-4.2: Enclosure: 18/4-4.2 C128/C128D diagnostic EEPROM

5 PC (5 pages)

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)

6-1.1: Commodore Service Information Network preview

Issue 19, Dec 1987

Seasons greetings from Commodore Service Dept (1 page)
1 Info (2 pages)

1-0.0: Info section index
1-1.1: Attachment: letter from vice president of service (1 page)
1-2.1: Attachment: service telephone directory for 1988 (1 page)
1-3.1: Attachment: quick reference sheet (1 page)
1-4.1: Notice of annual subscription automatic billing
1-5.1: Attachment: return mail form (included)

2 Parts (1 page)

2-0.0: Parts section index
2-1.1: Parts update - issue 19, december 1987
2-2.1: Improved parts deliveries to west coast
2-3.1: Parts department - closed january 3, 4 and 5

3 Amiga (2 pages)

3-0.0: Amiga section index
3-1.1: Repair 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:

4 CBM (1 page)

4-0.0: CBM section index
4-1.1: 1802/CM141 Goldstar monitor troubleshooting
4-2.1: 1802C Daewoo monitor troubleshooting

5 PC (3 pages)

5-0.0: PC section index
5-1.1: BIOS self test diagnostics

Issue 20, March 1988 (20 pages)

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 repair 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 (8 pages)
4-2.1: 1750/1764 schematics # 312534 / 311752
4-2.2: Enclosure: 20/4-2.2 - 1750/1764 schematics (5 pages)
4-3.1: 1084 monitor schematics - OEM reference
4-3.2: Enclosure: 20/4-3.2 - 1084 monitor schematics (3 pages)
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 (16 pages)

Issue 21, June 88 (17 pages)

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

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)

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 (9 pages)

Seasons greetings from Commodore Service Dept
1 Info

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

23/2-0.0: Index
23/2-1.1: Update for yellow parts price book

3 Amiga

23/3-0.0: Index
23/3-1.1: Operations notes - 1.3 Amiga Workbench

4 CBM

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

23/5-0.0: Index
23/5-1.1: PC drive add-on kits available from parts

Attachments

1) Service telephone directory 1989 (1 page)
2) Service quick reference sheet 1989 (1 page)
3) Warranty labor rates 1989 (1 page)
4) 1989 service training schedule (8 pages)
5) Commodore stocked parts - 1084S-P (1 page)

Issue 24, January - March 1989 (10 pages)

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 (included)

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

Appended to Techtopics issue 24: PC40-III video repair tip: IC/socket contact problems (1 page)
Issue 25, April - June 1989 (13 pages)

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 (1 page)
Issue 26, July - September 1989 (16 pages)

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 (17 pages)

Seasons greetings from Commodore Service Dept
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. (10 pages)
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. (4 pages)
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)

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 (18 pages)

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. (7 pages)
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

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.

Corrected page: Issue 29 section 2 page 3 (1 page)
Issue 30 July - September 1990 (12 pages)

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. (7 pages)
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 (12 pages)

Seasons greetings from Commodore Service Dept
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. (6 pages)
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 (19 pages)

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. (5 forms and ≥1 pages)
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 (1 page)
Service bulletin September 23, 1992 (1 page)
Service bulletin October 16, 1992 (1 page)
Service bulletin October 30, 1992 (1 page)
Volume 1, Number 1, March 1993 (9 pages)

Parts

Approved 3.5-inch IDE Hard Disk Drives for A4000 Systems
Approved 2.5-inch IDE Hard Disk Drives for A1200 Systems
Approved Walex Keylock Switch
Approved Thermalloy Heat Sink for the 68040 Microprocessors

Amiga

Improper Installation of Power Supply Fan in A4000 Systems
Package Insert for Monitors in A1200 and A4000 Systems
Untrimmed Leads on Power Connector for A1200 Systems
Removal of Capacitor (C460) and Replacement of Capacitor (C461) on the A1200 Motherboard
Availability of Patch Disk for A600 Hard Disk Drive
Software Release 7.0 for A2091 Systems

Commodore Techtopics

Online sources

Commodore Techtopics Issue 1, 1984: Datasette 1 - Model: 1530, 1531 at C64 Copy Protection (complete)
Commodore Techtopics Issue 2, 1984: Disk drive 1 - Model: 1541 at C64 Copy Protection (complete)
Commodore Techtopics Issue 3, 1984: Disk drive 2 - Model: 1541 at C64 Copy Protection (complete)
Commodore Techtopics Issue 4, 1984: Computer 1 - Model: C-64 at C64 Copy Protection (complete)
Commodore Techtopics Issue 5, 1984: Computer 2 - Model: C16 at Zimmers.net former FUNET archive (complete)
Commodore Techtopics Issue 6, 1984: Computer 3 - Model: PLUS 4 at Zimmers.net former FUNET archive (complete)
Commodore Techtopics Issue 7, 1984: Computer 4 - Model: C16, Plus 4 at Zimmers.net former FUNET archive (complete)
Commodore Techtopics Issue 2, 1985: Tid-Bits at C64 Copy Protection (complete)
Commodore Techtopics Issue 3, 1985: Monitor 2 - Models: 1701, 1702 at C64 Copy Protection (complete)
Commodore Techtopics Issue 4, 1985: Disk Drive 1 - Model: SFD 1001 at C64 Copy Protection (complete)
Commodore Techtopics Issue 6, 1985: Computer 1 - Model: C-64, C-16, Plus 4 at C64 Copy Protection (complete)
Commodore Techtopics Issue 7, 1985: Computer 2 - Model: CBM B-model at C64 Copy Protection (complete)
Commodore Techtopics Issue 8, 1985: Printer 1 - Model: 1520 plotter at C64 Copy Protection (complete)
Commodore Techtopics Issue 11, 1985: Disk Drive 3 - Model: 1541 "B" at C64 Copy Protection (complete)
Commodore Techtopics Issue 12, 1985: Monitor 3 - Model: 1701/1702/1802/CM 141/1902 at C64 Copy Protection (complete)
Commodore Techtopics Issue 13, 1985: Monitor 4 - Model: 1802/CM 141 at Zimmers.net former FUNET archive (complete)
Commodore Techtopics Issue 15, 1985: Disk Drive 4 - Model: 1541 at C64 Copy Protection (complete)
Commodore Techtopics Special technical update 12/17/86 at C64 Copy Protection (complete)
Commodore Techtopics Issue 18, Nov 87 at Internet Archive (missing index page)
Commodore Techtopics Issue 20, March 1988 at Internet Archive (complete)
Commodore Techtopics Issue 22, October 88 at Zimmers.net former FUNET archive (complete)
Commodore Techtopics Issue 23, December 88 at Zimmers.net former FUNET archive (complete)
Commodore Techtopics Issue 24, January - March 1989 at Zimmers.net former FUNET archive (complete)
Commodore Techtopics Issue 25, April - June 1989 at Internet Archive (missing index page)
Commodore Techtopics Issue 26, July - September 1989 at Internet Archive (missing index page)
Commodore Techtopics Issue 27, October - December 1989 at Internet Archive (missing index page)
Commodore Techtopics Issue 28 January - March 1990 at Zimmers.net former FUNET archive (complete)
Commodore Techtopics Issue 29 April - June 1990 at Internet Archive (complete)
Commodore Techtopics Issue 30 July - September 1990 at Internet Archive (complete)
Commodore Techtopics Issue 31 October - December 1990 at Internet Archive (complete)
Commodore Techtopics Issue 32 April 1991 at Zimmers.net former FUNET archive (complete)
Commodore Techtopics Service bulletin July 1, 1992 at C64 Copy Protection (complete)
Commodore Techtopics Service bulletin October 16, 1992 at C64 Copy Protection (complete)
Commodore Tech Topics Volume 1, Number 1, March 1993 at Zimmers.net former FUNET archive (complete)