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Beolover SyncDrive: DC Platter Motor Replacement for Beogram 4002 and 4004 (Type 551x and 552x)

Late Beogram 4002 and the 4004 (Types 551x and 552x), which have DC platter motors instead of the earlier synchronous AC motors usually suff...

Friday, May 20, 2022

Beogram 4000: A New Arrival From the UK

I recently received a Beogram 4000 from the UK for restoration. It arrived well packaged in a plastic shipping box padded with high density foam. An excellent way to send a Beogram 4000 across 'the big pond'! It arrived in very good condition:

The hood was wrapped in cling wrap and seems to be in very nice condition. The aluminum surfaces are also pretty good:

The plinth came unglued on the right side, but otherwise is in excellent condition with perfect corners:
I removed the panels and platter and had a look:
No 'human interaction' on first glance. Units that were not modified are an excellent starting point for an 'uneventful' functional restoration. There is a bit of corrosion on the leaf springs that hold up the floating chassis:
The fuse box cover has a missing tab:
I will need to think about something to rectify this since it is a safety hazard. The open fuse terminals carry the grid voltage...
Time to fire the unit up for a quick test. First I installed an aluminum pulley to be able to drive the carriage. This unit came without pulley (I may find it later somewhere in the enclosure...they often come off during shipping...;-):
The next step was to exchange the awesome fused UK power plug
with a boring US plug:

Then I switched the unit to 110V and plugged it in. I pressed 'ON' and it came alive. The carriage moved about 10 mm and then stopped, and I was not able to elicit any response from the keypad. Probably corroded switches or a dead 6V rail. On the positive side there is a working strobe light!
And the AC platter motor was running. All the bulbs except 33 RPM (very weak, though) in the keypad seem to be dead, though.
Summarizing, this is a promising unit for restoration to a 'near-new' condition! Usually, functional issues can be repaired in the 4000. It is a pretty sturdy mechanical design and the electronics function without modern microcontrollers. Perfect for an 'extended lifespan'. The next post will be about the restoration of this beauty! Stay tuned.

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