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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...

Monday, April 26, 2021

Beogram 4004 From Canada: Begin The Listening Tests

This Beogram 4004 turntable is doing what it was built to do...play records beautifully.

I finished record play testing of the Beogram earlier on the workbench.




























Satisfied with the performance on the workbench I reinstalled the deck panels.




























Installing the deck panels can be quick and easy or it can take a while and require a lot of adjusting.
This Beogram was somewhere in between.  The panels fit onto the frame in a specific way but on each of the three floating suspension leaf springs there is a mounting post for the panel that sits on top.
If the deck panels do not appear to be properly aligned the posts may need to be bent appropriately to align the panels.

Similarly, the screws that the leaf springs fit over and are adjusted with may need to be bent in order to shift the floating suspension so the platter is centered in the hole of the deck panel.
Note: Be careful with bending the posts and screws. Make sure the threads of the screws are not damaged if you have to adjust them. I use rubber sleeves made for my pliers that prevent any metal to metal contact.

Here is a photo of one of the three leaf spring mounts. It shows the deck plate post and the leaf spring adjustment screw.




























Always assemble everything without making any adjustments first.  If your Beogram 400x turntable is all original and hasn't been readjusted then everything should fit properly without any adjustments except possibly for tension on the leaf springs to adjust the platter height (relative to the deck).

If things do not fit properly then likely someone in the past tried (unsuccessfully) to make adjustments or someone swapped out the deck panels at some point.

Here is the Beogram 4004 moved to my office where I will be doing some listening tests for the next week or two while I set up and polish the dust cover.

I was in the mood to hear some Fairport Convention.  I recently picked up a 180 gram re-issue of "What We Did On Our Holidays" as well as a 1976 copy of  their 1969 release "Unhalfbricking".
I attached an MMC-20CL cartridge for these listening tests and the Beogram 4004 plays perfectly.




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