[Mark-sf]

Yuu may be in luck.

Check out https://www.ebay.com/itm/225323092352?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=MsBlO8arR5-&sssrc=2047675&ssuid=WrB3U2kWQBO&widget_ver=artemis&media=COPY

 

[Mark-sf]

If all you are concerned with is amplification, then almost any Beogram will work as their phono cartridge outputs are similar. However, your 4002 is worth servicing and you are going to need a new/re-tipped cartridge anyway.

[Mark-sf]

Unfortunately, I don’t know how this can be fixed without a new head and wiring which at this point means a new arm.

[Mark-sf]

I should have been clearer regarding “continuity”. You will not see 0 ohms but there will be a resistance vs. an open circuit. If your meter is not Auto-Ranging, you may have to change to a higher range to observe this resistance which should be ~1K Ohms.

[Mark-sf]

Both those bulbs are bad if you do not have continuity from them. If you want to confirm before ordering, this lamp is the same one that illuminates the 33 and 45 speed adjustment.

[Mark-sf]

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.

[Mark-sf]

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-sf]

69er wrote:

@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.

[Mark-sf]

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.

[Mark-sf]

Are you able to lower the tonearm manually with Play after moving it with the arrows? Does it play the record that way?

[Mark-sf]

JC wrote:

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.

[Mark-sf]

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.

[Mark-sf]

Echodog wrote:

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.

 

[Mark-sf]

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.

[Mark-sf]

I have always used variacs while monitoring the current. I assume you meant that one side of the fuse was not making contact.

[Mark-sf]

While you are at it I would also replace that cap.

[Mark-sf]

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.

[Mark-sf]

What do you mean by “physical movement around the turntable”?

[Mark-sf]

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?

[Mark-sf]

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.

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