Dillen
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Yes
Has little glue remains, but they should file off easily.Martin
So…
Sound drops out after a few seconds, and VU-meters follow?
The tape keeps running?
Both tape reels are rotating?
And if you touch the tapehead solder tags you get a buzz from the speakers and deflection on the VU-meter?Sure the tape has a good recording on it?
Martin
Check for cracked solder joints, particularly where connectors are soldered in the main PCB.
Martin
Did you check the 7Vref?
It’s not important if Dolby is in or out. The signal runs through parts of the Dolby ICs regardless.Martin
Sounds like a mechanical problem, – misaligned tapeheads or something bent in the tape path.
Is the tape running off the head?Martin
And there are in fact two different counterweights – used in different models, but very similarly looking and not interchangeable.
Martin
A capacitor problem, perhaps.
Check the 7Vref to the Dolby ICs.
Does the VUs still deflect or will they fall to zero as sound disappears?Martin
Did you adjust anything?
If you didn’t – DON’T!
If you did – that’s why.Martin
35V on a 5V rail is bad news.
This is one of those cases that will typically never be completely repaired, seeing as all circuits
running on 5V will be damaged.
Even after repairing and replacing everything that appears to be affected, some
components will still have scars that will show up as faults later.My suggestion – find another Beomaster.
Martin
Beogram CDX2 has more in common with Beogram CD3300 than CDX.
For some of the Beogram CDX2 circuits, you can use the CD3300 service manual.Martin
Is something rubbing og grinding? Does the belt touch the motor bracket?
Did you check the motor suspension rubber bushings?Read more here:
Martin
Lubricating the belt?
Sounds more like an adjustment issue with the lid switch.Martin
Foam, where foam was used originally.
Repalcing with rubber changes the T/S parameters drastically.
If you only had the T/S to compare, you would never suspect it to be the same driver.Martin
Which type of Beogram 1800?
The newer (flat belt);
Take off cartridge and store in a safe place.
Lift off platter.
Push tonearm so that its outer end is over the area where the platter was.
Losen two screws, one each side from below holding the deck alu surface (Beogram out
over the edge of a table one side at a time – don’t turn it upside down),
lift the deck surface plate gently and pull it towards you.
When you can reach below you can take up the small switch for the play button and unplug
a connector for the deck surface control buttons and take the deck surface off.
Now you can replace the belt and you can also inspect the motor bushings (replace them if they are still the original).
Put back in reverse order – watch out that the leads to the buttons aren’t trapped or sandwiched at the right side screw block.The older is a different story as the old belt is easiest removed by simply cutting it and pulling it out.
The new belt is placed around (under) the platter form above and, from below, using
a hook-like tool, fish it out and lift it on to the idler next to the motor.Martin
Check the filter capacitors and their respective resistors for the opamps in the analogue output stages.
Martin
