Well it has been a while since my last post, but currently I am busy with some career changes. Starting a new job after 28 years at SMC is quite tough, many new impressions, people, processes and not to forget a different business language (abbreviations). However, another CDM2 failed during the last weeks. It failed to navigate between tracks with […]
Category: CDM2
New Micro-Processor Board running inside the CD555 for the first time
Finally, after endless months of development Revision C of the new Microprocessor Board is running inside the machine to control the tape and the CD-Player. Let’s not talk about Revision B since it still had some faults. However, it has been a long way and took many fails and expenses to come this far. Some days ago, for instance, I […]
New MicroController Board Rev.C running inside the CD555
After a while there has been some progress regarding the new Micro-Controller Board. Let’s skip Revision B since it still had some issues and move forward to revision C. This revision finally made it inside the SoundMachine. Everything fits and is working although I have to change the position of connectors for easier assembly. It is not possible to get […]
Started with the development of a new uProc board
Well it has been a while since my last post. I have been off for a couple of months due to rehabilitation on burnout and now very slowly trying to get back to life… but that is another story. But let me introduce you to my latest project… After a successful reverse engineering of the CDM2 controller protocol and the […]
CDM2 repaired
The first thing I liked to repair for Markus’s machine was the CDM2. The disc was not spinning and has not shown any signs of life. To avoid any possibilities of using a failed decoder board I was using my “modified” CD150 which has the connectors outside the case ready to be used with a CD unit for a better […]
Another interesting detail of the CDM2/29
Recently the CDM2 in Unit#4 failed to play. Hooray! At least something to work on 🙁 The Sound Machine right from hell. The CD was not spinning and the sound the motor produced was quite noisy. It was quite obvious that this is a mechanical issue. Even by hand I was not able to spin the motor. Unfortunately, this means […]
Another CDM2 repaired but one failed
The last days I repaired another CDM2 from a CD150 donor. The issue of the device can be described as a kind of “cramp”. The swing arm moved to the top position and stopped there as well as the focus got stuck in the upper position and both do not react. A working CD150 decoder unit helps to test the […]
CDM2 repaired and a first impression of the tape mechanism
Since the assembled CDM4 is not working I repaired one of my spare CDM2. The issue I had was related to the little peace of plastic on the focus. It adds some weight and stiffness to the metal film of the focus. I figured out my “fix” with a double sided tape to place the plastic plate back on the film was […]
1 + 1 = 1
I decided to mix up the parts of unit #4 and #5 to finish another one. Since there are some severe issues with the tape mechanism on unit #4 there are two broken switches on unit #5. However, this way I can finish another CD555 much quicker and can focus on the battery pack. Summer is coming we are going […]
Unit #4 mainly working
I am getting faster with every unit. There are some neuralgic points that always fail. On the power supply it is definitely the transistor 7477 which was in almost all units broken or got killed during ling time testing. On the amplifier part one TDA2030 was not working – only a buzzing noise on its output. To check it I […]