Beogram 4002 – should I replace the capacitors

[ChristianHak]

Hi all,

I’m new to this forum. I bought a beautiful 4002 a year ago that is in great cosmetic condition and had not been used in many years. I went through the usual cleaning and lubricating process that Beolover suggests and now is functioning really well. However, I have two questions:

1. It functions perfectly other than it appears the sensor doesn’t detect if there is a record on the platter and will drop the needle regardless whether there is a record or not. The light on the sensor arm is working. I have borrowed an oscilloscope from a mate, however, I don’t know how to check the sensor voltage. Any help here would be greatly appreciated (I’m a furniture maker by trade – not an electrical engineer – so I’m not too familiar with electronics).

2. All the capacitors, relays and transistors are the originals. Is it worth preemptively replacing these? I would love to learn how to do this myself if there are any enthusiasts in Brisbane, Australia that would like to help me. I can offer a carton of beer or your favourite whisky 😉 Alternatively, I could fashion a new solid timber trim (oak, walnut, rosewood, or teak) for a 400X as payment.

Thanks everyone!

Christian

 

[Mark-sf]

Welcome to the forum! You can find the service manual online which describes testing for the detection signal. If you are not comfortable with soldering and desoldering I would fine someone that is. While replacing caps and relays is called for as a general restoration strategy nothing is harmed to wait for a failure if it’s working fine. You can even live with the detection issue if it’s not simply an adjustment.

[matador]

Mark-sf wrote:

While replacing caps and relays is called for as a general restoration strategy nothing is harmed to wait for a failure if it’s working fine.

Just for saying that, Thank you Mark-sf! Really.

[ChristianHak]

Thanks for the reply, Mark. I will take your advice.

Anyone Beogram enthusiasts here from Brisbane, Australia?

[Author]

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