Flaky 128DCR

[maraud]

I have a 128D which I was using with a lt. Kernal.  Getting the LtK to work with the internal disk drive required cutting a pin on U3 and wiring to the daughter board.  That was all well and good, but I decided to removed the LtK from the setup and when trying to resolder that pin (with a trace wire) to the board the damn thing broke off at the IC plastic.

Long story short, dead computer.  So I pulled that chip, ordered a new 74LS08PC and put in a socket and all appeared well.  Welp I'm still getting flaky behavior on file access (only in 128 mode) and I assume it's because the u3 chip is involved in burst mode and memory banking (who knows what else).

I'm gonna pull the machine and check my socket maybe the solder didn't float all the way through to the top of the board.  Any other ideas?

[RobertB]

I'm gonna pull the machine and check my socket maybe the solder didn't float all the way through to the top of the board.  Any other ideas?

Have you thought about sending the board to Ray Carlsen for repair?

                 Truly,
                 Robert Bernardo
                 Fresno Commodore User Group
                 http://videocam.net.au/fcug
                 The Other Group of Amigoids
                 http://www.calweb.com/~rabel1/
                 Southern California Commodore & Amiga Network
                 http://www.sccaners.org

[maraud]

I'm gonna pull the machine and check my socket maybe the solder didn't float all the way through to the top of the board.  Any other ideas?

Have you thought about sending the board to Ray Carlsen for repair?

That would be a negative, as I'm unfailiar with Ray?  How would I get in touch with him?

[RobertB]

That would be a negative, as I'm unfailiar with Ray?

Ray Carlsen is the most famous Commodore repair tech in the world.  His website at

                 http://personalpages.tds.net/~rcarlsen

is the only one in the world that is completely devoted to Commodore repair.  Over the years, he has repaired dozens of C= devices for my club and myself, and he has repaired C= equipment from people all over the world.  His diagnoses of the problems are precise, his prices are fair, and his communication with the customer is excellent.

How would I get in touch with him?

His e-mail address is right there on the website listed above (though his washington.edu alternate address may not work anymore since he retired from the university earlier this year).

                 Truly,
                 Robert Bernardo
                 Fresno Commodore User Group
                 http://videocam.net.au/fcug
                 The Other Group of Amigoids
                 http://www.calweb.com/~rabel1/
                 Southern California Commodore & Amiga Network
                 http://www.sccaners.org

[RobertB]

Ray Carlsen is the most famous Commodore repair tech in the world.  His website at

                http://personalpages.tds.net/~rcarlsen


is the only one in the world that is completely devoted to Commodore repair.  Over the years, he has repaired dozens of C= devices for my club and myself, and he has repaired C= equipment from people all over the world.  His diagnoses of the problems are precise, his prices are fair, and his communication with the customer is excellent.

As of last year, Ray Carlsen has retired from Commodore repairs.  However, he still builds heavy-duty Commodore and Amiga external power supplies, even custom-designed ones.  He also still builds Commodore A/V cables, including custom cables.  His website is now at

http://portcommodore.com/rcarlsen

His e-mail address is there on the front page, as is the e-mail of the person Ray recommends for repairs, Michael Myers.

          Truly,
          Robert Bernardo
          Fresno Commodore User Group - http://www.dickestel.com/fcug.htm
          Southern California Commodore & Amiga Network - http://www.portcommodore.com/sccan

[BigDumbDinosaur]

I seem to recall that a driving reason for Ray's retirement was progressing neuropathy in his hands, which affected his ability to work on PCBs in close quarters.  The other factor was likely that his stash of CSG-specific parts ran out.

[RobertB]

I seem to recall that a driving reason for Ray's retirement was progressing neuropathy in his hands, which affected his ability to work on PCBs in close quarters.  The other factor was likely that his stash of CSG-specific parts ran out.

To be more specific, he has essential tremors in his right hand (his dominant hand).  That and an illness in the family.  His stash of parts is not the reason that he retired.

         Now his stash of parts is with Michael Myers,
         Robert Bernardo
         Fresno Commodore User Group - http://www.dickestel.com/fcug.htm
         Southern California Commodore & Amiga Network - http://www.portcommodore.com/sccan