Mark-sf
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I would start with the power supply and check if you ar getting the full 12.5V when the motor is trying to run. I would also consider replacing C1, C3, C4, and C5.
The Primary and Secondary keyboards use the same logic through different decoder ICs and connect to the CPU. You should perform the same test with the P81 connector of the Secondary keyboard as that has the door control buttons. The Primary has the direct CD access buttons which I assume is what you meant by “cd allocation buttons”.
@Mark-fs: what does put a scope mean?
Scope means oscilloscope. Since the remote is working, likely the CPU is fine. The keyboard interfaces with the CPU with a decoder/demux chip using 5v logic. Since you don’t have a scope, I would disconnect the keyboard and check for switch continuity between the matrix of connections on P72 as well as its soldered connections.
I would focus on the Primary Keyboard and put a scope P72 or P12 connector and check that the signal correct routing occurs when each button is pressed.
Are you able to lower the tonearm manually with Play after moving it with the arrows? Does it play the record that way?
Thank you for responding. The Beogram 1700 appears not to have a “stop” control-button, like the 1900/1902; a strange omission in my view. Now you have to touch the tonearm to return it after pushing “pauze”.
You are correct. The only automatic arm movements supported are starting and end of record. Pause assumes you are going to manually move the tonearm so if you want to end a record early you do it manually through Pause.
As I recall from being a dealer back then, the 10E was a transition cartridge that started with the Beogram 1602, which followed the 2400 which had an MMC4000 cartridge. I believe there was the option to go with the 20EN as the 10E is a bonded diamond.
Would that explain why I’m not getting any signal even when I bring the arm over manually and drop the tone arm?
Yes as the mute switch has not disengaged.
You can use an MMC20E (bonded elliptical) or MMC20EN (nude elliptical). There is also the top MMC20CL but I that would set you back more than the whole unit.
I have always used variacs while monitoring the current. I assume you meant that one side of the fuse was not making contact.
The high voltage on the 5V+ sounds to me like its not being normally loaded as the 6.2V zener at D20 is setting its max. This is reinforced by your previous report of 5.06V output. I would definitely start by examining its fanout presence to its loads.
In addition to the muting switch, you may have a DC offset issue with your phono section. Is the piping only in one channel or both?
First I would loosen the set screw in the black endcap to release trapped air. If that doesnt help then applying a penetrating oil/WD40 and leeting it soak should free it.
To address this you need to upload a picture that actually shows the arm skew you are referring to. It’s not clear whether both arms are skewed or just the tonearm. The arm movement adjustment only governs the perpendicularity of the arm to the grove as it plays the record and is not a factor when the arm is cued up.
While I don’t have any 6000 leads, you can also look for a 4002 with an MMC6000 cartridge and a CD4 board. You probably have a better chance. However, your biggest issue will be finding a functioning cartridge. Soundsmith can retip them though at $600 is not cheap.
If you need to lubricate, remove the dustcover and then the tonearm cover can be lifted straight up to gain access the dial and gear. At that point you can check the balance of the arm and the rear counterweight adjustment. You should not need to track at 1.2g. Sometimes the arm cover can get pushed so that it binds the arm. Its height should allow the screw to be centered and the arm to move freely when lowered.
