During the last days I reassembled unit #2. Of course it was not as easy a I thought. First problem was my CPU replacement board which builds too high to have enough space between the uProc and the cassette panel. However, I had a third PCB and completed it with elbow connectors and lower IC sockets. Furthermore I removed the […]
Month: September 2020
The hardest thing…
when repairing this old machine is the cat. I am always searching for parts which are spread around the house. Very nice when you step on an IC, gives a nice pattern on you foot. Lego is for beginners…
CD Player working
Since there were a lot of issues with the CD Player it took some time to solve them. First the Decoder Panel was not working. After putting all the ICs on a socket and after I exchanged all capacitors the replacement of SAA7000 and SAA7020 did the job. In the same time I have done some optimisations to the circuit. […]
CPU replacement issues solved
I have tested the new CPU replacement board outside with a 12V supply. When finally mounting it to the uProc board and used the 6.4V supply of the board I run into one issue. The clock signal for the CD-CPU should be 5.8MHz but was flat. One issue have been the two capacitors I was using for the 7805 to […]