Well, after studying the service manual for a couple of days and after some measurements I got a first impression of what is broken. The three keys for the CD-Player Play/Stop/Pause are controlled by the tape deck CPU. As we have seen that no key of the tape deck shows any reaction I have a suspicion. To check if I […]
Month: June 2020
Checking the power supply
The first step is to measure if the power supply is working. The time I started with the documentation of this website I have already done this step so I can explain in detail the problems and workarounds in a singe post. The power supply consists of seven main supplies. However, several boards do have additional circuits (e.g. 78xx) to […]
The initial situation
What issues do the sound machine have? As I already stated in another post I have now three of them all showing the same issues. Based on the following four sections I am going to add the current state on the main page. AM/FM Radio The radio is working fine. It is possible to receive signals although it is quite […]
The workplace
Since I have not been active in the field of electronics for many years there are only a few tools left my from previous activity. That also includes my knowledge about transistors and other parts which I really need to refresh. Beside a voltmeter and an analog electric soldering iron, which requires new bits, no other tools are available. Rigol […]
Hello & Welcome
For decades I planned to resurrect my old Philips Compact Disc Sound Machine CD555. Back in the eighties I had to safe my money for half a year to be able to buy this sound machine. I had been extremely happy for about 2 or 3 years when the unit broke – right after the warranty claim expired. I was […]