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Beogram 4002: Restoration of DC Motor Video Published - Check It Out!

By popular request (really, I got quite a few emails about this!...;-), I finally completed my Beogram DC motor restoration video! It demon...

Beogram 4000 Restoration

This video shows how to prepare and double-box a Beogram 4000 for shipping:



This video shows how to unbox and set-up a Beogram 4000 after it comes back restored:



This is a list of key Beogram 4000 related entries. They represent most of the essential tasks that I performed for full restorations and also give some insight into repairing miscellaneous issues. All the parts that I developed are available to other enthusiasts and shops - just use the contact form and get in touch!

Beogram 4000: Cleaning of the Tone Arm Carriage Position Switches and a Non-Returning Carriage

Beogram 4000: Recapping the PCBs

Beogram 4000: Adjusting the AC Motor Voltage (additional info here)

Beogram 4000: Replacing the Reservoir and Motor Capacitors Using a 3D Printed Adapter
(see here for additional information on this procedure)

Beogram 4000: Replacing the Light Bulbs in the Control Panel with LEDs

Beogram 4000: Restoring the Slow Slide Transport Function

Beogram 4000: Replacing the Light Bulb of the Tracking Sensor with a Drop-In LED Assembly
some more info about the photoresistors in the tracking sensor here.

Beogram 4000: Replacement of the Incandescent Bulb in the Sensor Arm with an LED
BTW: Here is an interesting post on Beoworld about how to repair a broken photocell in the sensor arm.

Beogram 4000: Restoration of a Seized Solenoid to Tonearm Linkage

Beogram 4000: Adjustment of the Tonearm Height and Tracking Force

Beogram 4000: Adjusting the Platter and the Chassis

Beogram 4000: Adding a Grounding Switch to Get Rid of Humming. This post has some higher resolution pictures of the way the grounding switch can be installed.

Beogram 4000: Adjusting the Solenoid and the Switches

Beogram 4000: Installation of Hood Mounting Screw Springs

Beogram 4000: Polishing the Hood

Beogram 4000: Installation and removal of keypad keys

Upgrades:

Beogram 4000: New Aluminum Carriage Pulley

Beogram 4000: Gold Plating of Terminals in Control System Switches

Some faults and their repair:

Beogram 4000: Replacing a Broken MMC Cartridge Mount with a 3D Printed Replacement Assembly

Beogram 4000: Solenoid oscillates

Beogram 4000: Replacement of a Stuck RPM Relay with a Modern Encapsulated SMD Relay

Beogram 4000: Fixing a Bent Output Switch Contact Tab

Beogram 4000: Adjusting the Gap at the Carriage Servo Pulley Bearing

Beogram 4000: End Groove Detection Issue
(Carriage stops before end switch is reached when no record is present)

Beogram 4000: Intermittent "17" Position Switch Causing Immediate Touchdown After Launch


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