Now after the teardown we need to reconnect the panels to get a working naked “sound machine”. To place all the panels it is necessary to extend some cables. To have access to all panels is a lot of work but it is worth the job since we can easily take them out and can step by step control, repair […]
Month: October 2020
Welcome Unit #4
Some days ago I found another CD555 Sound Machine on an online flea market in Austria. Yes, call me crazy but I had to buy it. On the picture it looked as it would working, also the Lady who sold it said it is working. I was sceptical because this would have been the first unit I have seen which […]
Teardown
Now it is getting serious – we are disassembling unit #3. In this case a video it really helpful and shows the steps I took to remove all the parts. Usually you might to take notes or remember which screw you took from which part of the device but in this case the machine already got opened and the screws […]
Unit 3 – A first analysis
Now it is time to start to analyse unit #3. It is always a good idea to have a look at possible issues before disassembling everything. The first aid section gives you some hints what can be the problem. Unit #3 shows the same issue as unit #1 – the LCD of the tape deck has all the segments enabled […]
Another video explaining the differences of the new tape deck controller
Better than describing a function is to show it. And here is a short video explaining the implementation of the new tape deck CPU and the firmware… https://youtu.be/vzf9zgwYRe8
Started with videos…
The last days I had some problems with my arm and was not able to use the computer. Ever tried to use the mouse with the left hand when you are right handed? At least not Covid – hope all are healthy and safe! But I thought this would be a good time to start with additional videos. Sometimes it […]
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 […]
OMG look what I am found…
I knew that I still have the user manual of the sound machine somewhere. After three times of moving and still have some unopened boxes in the basement for 15 years(!) I thought it might be in one of the boxes. There must be something VERY important in those boxes if I do not need the content for such a […]
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 […]