For repairs to your equipment or additional info: email: rcarlsen at tds dot net
First on this list: how to pack equipment properly for shipping, and what can happen if you don't!
series computers: C128-40, B128-80 (aka 700), B256-80, & the P500.
C16 computer: schematics
C116 computer: schematics
C64 computer: repair articles and schematics, service manual, black "brick" PS, Computer Saver mod,
adding a reset switch, using an EPROM to replace the PLA, adding heat sinks to IC's, etc.
C65 computer: motherboard photo only
SX64 portable computer: repair articles, schematics, adding an "invisible" reset switch, disk drive swap,
photos, keyboard repairs, how to replace missing handle caps, the SRQ line mod, etc.
PET64 computer: photos, ROM binaries, & misc info.
Plus/4 computer: a beginners tutorial, service and troubleshooting mauals & power connector info.
C128 computer: repair articles, schematics, VRAM upgrade, PS repairs, etc.
C128DCR USA (metal case) computer: repair articles, schematics, add a fan, WP bypass, drive # change, etc.
VIC20 computer: repair articles, schematics, etc.
The datassette (C2N and 1531): some common problems and their solutions
drive: repair articles and schematics, drive reset mod, drive # change,
1551 disk drive: schematics only
1571 disk drive: repair articles and schematics, PS info, reset mod, transit card, etc.
1581 disk drive: schematics, PS, reset mod, diagnostic procedures and bug fixes.
Enhancer 2000 disk drive: schematics, photos and service manual
MSD SD-1 and SD-2 disk drives: repair information, schematics, Ops manual, CLD MassDupe, etc.
FSD-1 disk drive: photos and DOS ROM binary file
FSD-2 disk drive (aka Oceanic OC-118 & Excelerator+Plus): photos and DOS ROM binary file
INDUS-GT disk drive: schematics, photos & ROM binary files
SFD-1001 disk drive: schematics, DOS ROM binaries, etc.
BLUE CHIP and AMTECH disk drives: 1541 and 1571 clones, external transformer power pack
17xx series RAM EXPANSION units: schematics and board layout.
Commodore monitor schematics and hardware repair information.
MISCELLANEOUS REPAIR ARTICLES, "HACKS" AND OTHER INFO.
power supply for your C64 or "flat" C128
Pinouts of various Commodore connectors
A replacement power switch for your Commodore monitor
A replacement power switch for the C64 and C128
Testing and evaluating the SID (sound) chip in your computer, sound clips, a small BASIC test program, etc.
Desoldering IC's safely
Power supply testing and repair
Testing control ports with a small BASIC program
Adding a fan to cool your computer or disk drive
How to install a safe and simple write-protect bypass circuit in your disk drive
How to repair a cassette or datassette tape
Diagnostic cartridges: what Commodore factory techs used to repair computers
Adapters to replace Commodore ROMs with newer EPROMs
Jason-Ranheim EPROM burner and Promos 2.0 software
The CMD RAMLink, some generic information
Pict-o-guide, a few screen shots of common faults.
Use a C128 PS on your C64 by adding (pigtail) a C64 power connector to the supply.
and software: diagnostic and other cartridges, zip files, printers, Ketek
VIC1020, VIC20 switch, CSI switch,etc.