[Dillen]

Yes. Just plug it in.
If the Beogram 2404 has 7 pins in the DIN plug, you must unscrew the outer two using a small flat-bladed (watch-makers) screwdriver, or the Beomaster socket will not accept it.
The two pins are for datalink communication, which is not supported by Beomaster 1900.

Martin

[Dillen]

Belts.
Idler rubber parts.
Cleaning, lubrication.

Martin

[Dillen]

Any DC voltage on the motor tabs?

Martin

[Dillen]

Bad lid switch – or badly mounted?

Martin

[Dillen]

A bad main CPU can also cause the remote to not work. I have replaced several with bad IR inputs.

Martin

[Dillen]

Contact Danish Sound Parts.
I hardly ever use the message system here.

But the washers are usually not the root cause. It’s the sliding plastic coupler – something that is being worked on every now and then.
It’s a fantastic and unique receiver, but a goofy construction.

Martin

[Dillen]

Check power supply voltages – are they correct and clean?
Check the CPU reset circuit.
Replace the CPU.

Martin

[Dillen]

No, the stands for the later model (6312) will not work with the early Beovox S45 (6302).

Martin

[Dillen]

Broken lead inside the DIN plug?

Martin

[Dillen]

I use hot glue.
It’s easy to work with and holds absolutely fine.

Martin

[Dillen]

Adjustment of potentiometer pos. 585 and 586

Connect oscilloscope to the speaker output

Amplifier is fed 1 kHz sine, until clipping starts

Capacitor 4.7uF is mounted across C-E of TR43

Resistor 190ohm 23Wa (part# 5107005) is mounted across C-E of TR46

Potentiometer 5Kohm pos 585 is adjusted until distortion on negative peak

Resistor is moved to C-E of TR47

Potentiometer 5Kohm pos 586 is adjusted until distortion on positive peak

Left channel is adjusted as above

Martin

[Dillen]

Check for cracked solder joints – especially where connectors are soldered into PCBs.
Check also the supply voltage to the motor control circuit.

Martin

[Dillen]

They go at the back. Sorry about the bad lighting, but I think you can see it.

Martin

[Dillen]

Somewhere wrong with the motor circuit apparently. Perhaps missing feedback from the motor?
Did you check the speed setting trimmers?

Martin

[Dillen]

You need to take off the whole rear piece with the hinges etc.
Then you remove the two small plastic covers under the lid to reveal the screws.
Ask at Danish Sound Parts if you need a replacement cover, they may very well have a good used one in stock.

Martin

[Dillen]

Will the motor rotate easily by hand?
If not, take apart, replace bearings, clean and lubricate etc.

Martin

[Dillen]

Confirmed by Bang & Olufsen – it is not a Bang & Olufsen catalogue, and they never sold the products shown.

Martin

 

[Dillen]

And no B&O part numbers.
I agree that the wooden cabinet would be a very bad solution when it comes to keeping things cool.

Haven’t seen this before.

Martin

[Dillen]

Bad filter capacitors, perhaps?

Martin

[Dillen]

The teflon sheet is apprx. 2 x 3 cm.

Martin

[Author]

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