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 […]
Category: CD Player
Replace broken parts of CD tray and buttons
Unfortunately some parts in Markus’s machine are broken and needed a solution. The soft eject gear of the CD tray was broken. The mechanism itself was ok but the brackets to hold it in place got broken. After some thoughts and several tries I came up with a printed bracket that holds the soft eject gear in place. It fits […]
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 […]
Repairing broken keys of the CD-Player
Another problem due to its age are broken keys. Those keys are connected through a very thin piece of plastic which can easily break after more than two decades. It took me a while to find a way to fix it. The first try was to use some hot glue to put them back in place. It is a little […]
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 […]
CDM2 of Unit #3 repaired
After the uProc and the CD-Player keys are working it was time to have a look at the CDM2. A short test revealed that it was not able to read the TOC or to play tracks. I sometimes had the problem that the TOC failed to read but it was possible to play some tracks. Mostly above certain track the […]
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 […]
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. […]
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 […]