Ok, have a USA model 128DCR.
Everything functions perfectly except neither TOD clock in the CIA chips work. Swapped the CIA chips and same thing.
Chatted with Ray Carleson and he said that the U16 and U 30 74ls14 and 7406 are high failure items and to try replacing them. I did and same thing.
I do not have access to an oscilliscope so I am just kind of going for parts replacement.
Any suggestions would be great.
Turns out it was a fuse in the PS. Who would have thought.
Quote from: Racer on August 17, 2010, 11:40 AMTurns out it was a fuse in the PS. Who would have thought.
I was going to tell you to check the power supply for a blown fuse, but you beat me to it. The TOD clocks require a 50/60 Hz input, which was missing with that fuse blown.
BTW, now that you should have working clocks, you might find a use for
this software (http://www.commodore128.org/index.php?topic=2266.0).