Workbench Blog:
Newest posts at bottom |
|
| Processor Tech SOL 20 Terminal Computer | |
|
by Bill Degnan - 07/01/2009 08:21 |
 The Processor Technologies SOL-20 Computer
As with most projects, the first thing that needs to be done is check the 5V output to the motherboard. I assisted Dan Roganti test the power supply and we compared with another power supply to confirm the results. The SOL supply is OK, or at least it compares with a known-working supply. The voltage reading on the board however is not OK.  The DC Voltage is consistently below 5V, something is shorting out.
The next step is to remove all socketed chips to see if there are bad TTL chip causing the voltage problem.  The SOLOS Personality ROM daughterboard. Note how two connectors are cut...need to find out if this is intentional or damage.
More Pics Reply |
|
Create an Account
Resources:
Popular Topics and FAQs
Commodore B Series Tips and Tricks
Items Wanted
For Trade and/ or Non-Computer Stuff
Commodore Disk Archive Project
Computer History and Restoration Links
IC and chip inventory
IBM PC Parts Trade List / Inventory
CBM SuperPET Tips (CBM S9000)
Commodore B Series Tips and Tricks
Items Wanted
For Trade and/ or Non-Computer Stuff
Commodore Disk Archive Project
Computer History and Restoration Links
IC and chip inventory
IBM PC Parts Trade List / Inventory
CBM SuperPET Tips (CBM S9000)
Image Title: TECHNOLOGIES WORKSLATE 7
This image was selected at random from the archive. Click image for more photos and files from this set.
Past Issues:
Vintage Computer Festival East 3.0 June 2006
Commodore B Series Prototypes July 2006
VOLSCAN - The first desktop computer with a GUI? Oct 2006
ROBOTS! - Will Robots Take Over? Nov 2006
Magnavox Mystery - a Computer, or? Jan 2007
The 1973 Williams Paddle Ball Arcade Computer Game Feb 2007
The Sperry UNIVAC 1219 Military Computer May 2007
VCF East 2007 - PET 30th Anniversary June/July 2007
The Electronic Brain August 2007
Community Memory and The People's Computer Company October 2007
Charles Babbage's Calculating Machine December 2007
Vintage Computing - A 1983 Perspective February 2008
Laptops and Portables May 2008
From Giant Brains to Hobby Computers - 1957 to 1977 August 2008
Historic Computer Magazines November 2008
World's Smallest Electronic Brain - Simon (1950) December 2008 - Feb 2009
Free Program Listings Spring 2009
Computer Music Summer 2009
Popular Electronics Jan/Feb 1975 - Altair 8800 Fall 2009
Early Microcomputer Mass Storage Summer 2010
REV vintagecomputer.com.2010.07.10
Commodore B Series Prototypes July 2006
VOLSCAN - The first desktop computer with a GUI? Oct 2006
ROBOTS! - Will Robots Take Over? Nov 2006
Magnavox Mystery - a Computer, or? Jan 2007
The 1973 Williams Paddle Ball Arcade Computer Game Feb 2007
The Sperry UNIVAC 1219 Military Computer May 2007
VCF East 2007 - PET 30th Anniversary June/July 2007
The Electronic Brain August 2007
Community Memory and The People's Computer Company October 2007
Charles Babbage's Calculating Machine December 2007
Vintage Computing - A 1983 Perspective February 2008
Laptops and Portables May 2008
From Giant Brains to Hobby Computers - 1957 to 1977 August 2008
Historic Computer Magazines November 2008
World's Smallest Electronic Brain - Simon (1950) December 2008 - Feb 2009
Free Program Listings Spring 2009
Computer Music Summer 2009
Popular Electronics Jan/Feb 1975 - Altair 8800 Fall 2009
Early Microcomputer Mass Storage Summer 2010
REV vintagecomputer.com.2010.07.10
History of Commodore Computers Poster $19.99
