Merry Christmas to all of you. Christmas brought new speakers. Another modification and a huge improvement of sound. But the speakers need a case that fits better to the design of the Sound Machine. More later, in the meantime enjoy your holidays with your beloved.
Category: Unit 2
Unit 2 finished (for the moment)
Finally unit 2 is finished – or at least for the moment… What was done? All capacitors replaced with new Nichicon and Elna Audio. A list of all capacitors inclusive part numbers for mouser.com is available in the download section Every panel got repaired and working fine. Still one segment on the LCD at the CD-player lights up The tape […]
Last problems for unit 2 solved
The last days I was working on the final source code for the tape deck CPU whilst I noticed another problem – it was not possible to read the states of the write protection of side A & B and the event when the CD ends was not fired. It took a while and I had to dismantle the machine […]
Tape recording is now working
There was a little problem left on unit 2: pressing record caused an electrical short and a fuse on the AM/FM Panel got toasted. With he help of some picture from the other machine I figured out the undocumented cable was on a wrong pin. Hell, someone soldered it to the wrong position! Just took me some hours to recognise […]
Two CDM2 repaired
Since the CDM2 from the donor Philips CD150 is not working properly – if has problem to jump to tracks, especially track 7or higher – I had to prepare another spare part. The CDM2 from the second donor CD150 was working fine and I just replaced all the capacitors. Inside the CD150 I got a CDM2/10 and a CDM2/29. Seems […]
Unit #2 almost finished
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 […]
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 […]
CD spare parts and where to find them
To be able to locate the defect on the CD-Player I do need some spare parts. Right now the error could be somewhere at the CDM2 mechanics/controller board or at the decoder panel. I do not want to disassemble one of my other two devices for testing purposes, thus I have done some research in which CD-Player from Philips or […]
More CD-Player issues
After the amplifier is working it is time to check the CD-Player. Unfortunately it was not all the time working. Sometimes the CD was spinning faster and faster, the controller was unable to read the TOC returned an error. It was working better when the Decoder Panel was in a vertical position. So I thought it might be a loose contact. I […]