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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...

Sunday, October 22, 2017

Beogram 4004 Type 5526: Keypad Contact Cleaning

My Beogram 4004 project is about ready to wrap up. The dust cover has been polished and the keypad surface was refurbished at Beolover's workshop. After reassembling everything I found that some of the keypad buttons were not responding consistently. That usually means the contacts are dirty so I removed the keypad contact board to take a look.

Sure enough there was quite a bit of oxidation.















































The contacts look pretty tarnished but it isn't anything a fiberglass brush can't fix followed by some Deoxit contact treatment.

This looks much better.



























The Beogram 4004 controls are now working perfectly again.

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