Bang & Olufsen Authorized Service Center
📍 Los Angeles County & SoCal
🔧 30+ Years Experience
🎚️ B&O Specialist
🏢 TEK Media Group
📋 A NOTE FROM MY WORKBENCH: Beogram 4000, 4002, 4004, and 6000 are complex electromechanical turntables with linear-tracking tangential tonearms, automatic record size detection, and sophisticated logic-controlled operation. These models differ significantly in motor type, arm control design, electronics, and overall build philosophy. The Beogram 6000 is a later-generation model (1980s) with a sleeker profile, electronic speed control, and a more refined tangential arm mechanism. My 30+ years of dedicated B&O service allow me to expertly restore each model correctly and reliably.
⚠️ CRITICAL WARNING – BEOGRAM 400X & 6000 SPECIFIC: These turntables operate with voltages ranging from ±15V logic rails up to 80V AC motor supply. Capacitors in the power supply, motor control, servo, and audio sections are prone to age-related failure. The complex tangential arm mechanism requires specialized adjustment and calibration. Do not operate any unit that displays erratic behavior or fails to complete its automatic cycle, as this can cause damage to both the mechanism and the cartridge.
Beogram 4000, 4002, 4004 & 6000 – Key Differences & My Approach
The Beogram 4000 series and the later Beogram 6000 share the tangential arm principle but differ substantially in execution. Understanding these differences is critical to performing a precise restoration.
✅ WHY TRUST TEK MEDIA GROUP WITH YOUR B&O BEOGRAM RESTORATION:
- 30+ Years of High-End Audio Restoration Experience.
- Specialized, model-specific knowledge of the 4000, 4002, 4004, and 6000.
- Full electronic recap of power supply, servo, logic, and audio boards.
- Tangential tonearm mechanism cleaning, lubrication, and calibration.
- Motor service and replacement (AC Papst, DC servo, or electronic drive).
- Full optical sensor, solenoid, and microswitch service.
- Precision platter bearing service.
- MMC cartridge assessment and stylus replacement.
- 100% Personal Attention – No Assembly Line.
- 90-Day Warranty on All Work.
- Nationwide Service – Secure Shipping Available Across All 50 States.
🏆 MODEL COMPARISON: BEOGRAM 4000, 4002, 4004 & 6000
| Feature | Beogram 4000 (1972-1974) | Beogram 4002 (1974-1978) | Beogram 4004 (1978-1980) | Beogram 6000 (1982-1986) |
|---|
| Motor Type
| Premium Swiss Papst AC motor with strobe speed verification
| AC motor (early), DC motor (late)
| Servo-controlled DC motor
| Electronic speed control with quartz-locked DC motor (some variants)
|
| Build Philosophy
| Over-engineered, heavy sub-chassis, premium metal build
| Simplified for cost reduction, lighter plinth
| Evolution of 4002 with further refinements
| Slimline profile, aluminum chassis, touch-sensitive controls, minimalist design
|
| Tonearm Control & Logic
| Complex Swiss system, strobe indicator for speed verification
| B&O in-house logic, simplified arm control
| Refined logic, secured arm assembly for shipping
| Electronic logic with optical end-of-record detection, no solenoid drop (servo-controlled lift)
|
| Dust Cover
| Lightly smoked brown acrylic
| Hinged, adjustable angle up to 60°, removable
| Same as 4002
| Low-profile hinged cover, often clear acrylic
|
| Notable Option / Feature
| Built-in strobe speed display
| Gold Sim 74' / Top Form 74' awards. Quadraphonic BG6000 variant
| Remote control capability (Beolink) / 4000c re-issue limited edition prototype
| Beolink compatible, compatible with MMC4000, MMC20CL, MMC20EN cartridges; some models have wireless remote
|
Complete Beogram 4000/4002/4004/6000 Turntable Restoration Services I Offer
🔍 Full Diagnostic & Evaluation Complete functional assessment of all automatic cycles, speed stability, platter bearing noise, tonearm motion, and electronic component health
⚡ Power Supply & Board Service Full electrolytic recap of main, motor, servo, and logic boards, multimeter verification of all supply voltages (±15V, +5V), transformer check, and regulator replacement
🔄 Tangential Tonearm Mechanism (The "Heart") Full disassembly, cleaning, and re-lubrication of rails, bearings, and slide mechanism. Calibration of horizontal travel, vertical drop, VTA, and anti-skate tracking error to <0.04° (4000 series) or <0.06° (6000)
🎛️ Motor Service & Drive System For 4002/4004/6000: DC motor reconditioning or replacement, belt replacement, speed verification. For 4000: AC motor phase/run capacitor check, strobe calibration. For 6000: quartz lock circuit check
🧼 Solenoid, Switch & Photocell Service Clean all leaf switches, microswitches, and the optical detector sensor for record size measurement. Solenoid troubleshooting and repair (note: 6000 uses electronic lift, no solenoid)
🔬 Tonearm Control & Logic Board Service Recap the logic and timing boards, replace any failing relay ICs, verify logic chip operation
🏆 COMPLETE FULL RESTORATION All services above covering electronics, mechanics, motor, platter bearing, and final calibration for your specific Beogram model
💡 MY RESTORATION INCLUDES: Full electronic recap • Tangential arm rebuild, cleaning, and lubrication • Belt replacement • Speed calibration and verification • Platter bearing assessment and re-lubrication • Optical sensor check • Solenoid cleaning (where applicable) • Complete mechanical timing and calibration
🔬 REGARDING MMC CARTRIDGES: I can assess its condition, check for suspension sag, and replace the stylus if you have a specific brand/model requirement, though replacement styli are increasingly rare. If the cartridge internal coils are damaged, a full re-tip is required.
Beogram 4000/4002/4004/6000 – Component Overhaul Database
⚠️ Each Beogram model uses distinct electronic systems; component count and board layouts vary significantly.
⚡ COMMON ELECTRONIC REFURBISHMENT (All Models)
| Board / System | Action | Technical Focus |
|---|
| Main Power Supply
| Capacitor replacement
| Bulk filter caps, low-ESR, 105°C rated (Nichicon, Panasonic)
|
| Motor Control
| Capacitor replacement, transistor check, quartz loop verification (6000)
| Stable supply for platter speed logic (AC motor phase cap for 4000, servo DC for later models)
|
| Logic & Timing Boards
| Capacitor replacement, relay IC check (where present)
| Recap to prevent erratic cycle behavior (sticking, mis-sequencing)
|
| Audio Output / RIAA
| Capacitor replacement
| Audio-grade (Nichicon FG, Elna Silmic II) for signal path, Low ESR for decoupling
|
🔧 Professional Troubleshooting Tips – From My Workbench
💡 TIP #1: Erratic or Stalled Arm / Complete Cycling Failure
- The Beogram series relies on a complex interplay of logic circuits and mechanical relays. A dead or sluggish start often points to degraded power supply capacitors causing unstable low voltages to the logic system
- On Beogram 4000 models, the main logic board is very reliable, but the switches and small plastic guide spigots bind or wear, causing intermittent faults
- On Beogram 4002/4004 models, the most common cause of arm lift failure is a weak or non-engaging solenoid. This often stems from a failing electrolytic cap or a Darlington transistor
- On Beogram 6000, the arm lift is servo-controlled, not solenoid. Failure is typically electronic (failed op-amp or capacitor in the lift control circuit) or mechanical binding
- Gummed and dry lubricants cause the slide mechanism to stall. My complete disassembly and re-lubrication resolves this issue.
💡 TIP #2: Platter Does Not Spin / Speed Instability
- Check the drive belt. A slipping or stretched belt will cause speed instability
- On Beogram 4002, 4004, or 6000 with a DC motor, if the motor is dead or failing, I can recondition it or replace it with a modern, low-noise DC motor. The original synchronous AC motor on a Beogram 4000 is more robust; failure is rarer.
- On Beogram 6000, speed instability may also be caused by a fault in the quartz lock reference circuit or a drifting capacitor in the motor servo loop
- Capacitors in the motor control serving the oscillator or power supply can drift, causing speed warble.
💡 TIP #3: Wrong Speed / Speed Not Detected
- The Beogram uses a photocell in a parallel sensor arm ('magic eye') to detect record size and automatically select 33 or 45 RPM
- A burned-out bulb or a dirty optical lens stops speed detection. The lens is a common failure point. I clean or replace the lamp lens.
- On a Beogram 4000, check the strobe lamp if the speed is in question; its absence doesn't affect function but indicates potential power issues.
- On Beogram 6000, speed selection is electronic; if the photocell fails, manual speed selection may still work, but auto-detect will be lost.
💡 TIP #4: No Sound / Distortion / Hum
- First, check the phono preamp. These are Moving Coil (MMC) cartridges and require an MM-compatible preamp or step-up transformer.
- If the audio is distorted or cut out, it's likely the MMC cartridge. Internal suspension rubbers harden or sag, and the stylus may be missing a diamond or worn to a chisel
- Failing capacitors in the audio signal path of the tonearm wiring or the internal RIAA preamp (on some variants) cause hum and roll-off.
- Check the fine tonearm wires for breaks where they flex near the carriage.
💡 TIP #5: Tonearm Not Lowering / Not Returning / Skipping (Model Specific)
- 4002/4004: Insufficient force for the arm drop solenoid is a very common failure. The solenoid current limiting circuit engages too early due to an aged capacitor
- 6000: No solenoid; the arm is lowered by a servo-motor. Failure is typically a dead motor, broken gear, or faulty control transistor/op-amp.
- If the tonearm "drops" but sounds wrong, the VTA (Vertical Tracking Angle) is misaligned. This is rare but a critical adjustment after mechanical work.
- On a Beogram 4002/4004, the arm securing mechanism was improved to prevent shipping damage, but if missing or not re-engaged, it can cause damage
- If the arm carriage is physically bent, it's likely due to transport damage. Straightening must be precise
💡 TIP #6: My Comprehensive Restoration Philosophy for Beogram 400x & 6000
- The deep-seated cause of erratic behavior is a mix of degraded electrolytic capacitors causing logic glitches AND dried-out mechanical lubricants causing binding. I will fully address both issues.
- I use only premium, high-temp electrolytic caps (Nichicon, Panasonic, Wurth). For AC motor phase correction, I use high-quality film caps.
- For the tangential arm mechanism, I completely disassemble, clean, and apply new, proper damping grease to the rails and gears.
- I follow every procedure to factory mechanical calibration specifications to ensure long-term reliability.
⚠️ IMPORTANT NOTE FROM MY WORKBENCH: Beogram 4000 series and 6000 turntables contain high-fragility optical components and proprietary B&O logic chips which are no longer available. Reckless disassembly will permanently damage the unit. Always discharge the main power supply capacitors before service.
🔍 Quick Troubleshooting Reference Chart – From My Service Logs
| Symptom | Affected Model(s) | Most Likely Cause |
|---|
| Dead, no response, no lights
| All
| Blown internal fuse / dead power supply board transformer
|
| Doesn't cycle, arm moves partially
| All, esp. 4000
| Logic supply caps failed / gummed carriage rails
|
| Platter spins, arm moves but doesn't drop
| 4002, 4004
| Tonearm solenoid weak / dead driver transistor
|
| Platter spins, arm moves but doesn't drop
| 6000
| Arm lift servo motor or gear failure / control logic fault
|
| Incorrect or inconsistent speed
| 4000
| AC motor phase capacitor failed / strobe lamp burned out (doesn't affect function)
|
| Speed unstable or drifts
| 4002, 4004, 6000
| DC motor control capacitors failed / quartz lock circuit fault (6000)
|
| Tonearm slides back to rest mid-play
| All
| Anti-skate / tracking angle out of calibration
|
| No audio from one channel
| All
| Broken tonearm wire at suspension point / MMC cartridge failure
|
Deep Dive: My Beogram 4000/4002/4004/6000 Restoration Process (Core Shared Systems)
⚡ ELECTRONICS REVITALIZATION (Critical for All Models)
- Power Supply & Rail Stabilization: The +5V and ±15V rails need to be clean. I replace all aging electrolytic capacitors that cause the logic system to glitch and stall.
- Motor Control & Drive System: For AC motor models (4000, early 4002), I check the phase shift capacitor and replace if drifted. For DC motor models (4004, late 4002, 6000), I check the servo control circuit for noisy caps, and the motor itself must spin freely. On the 6000, I verify the quartz lock reference and adjust if necessary.
- Optical & Sensor Circuits: Clean the photocell for record size detection, and if the small lamp is burnt out, the system fails; I repair this to restore speed auto-detection. On the 6000, the optical sensor is more integrated; I test and replace as needed.
- Audio Path & Output Board: I recap the audio section on the main board or the separate RIAA preamp board. I use low-noise, audio-grade capacitors for the signal path.
🔄 TANGENTIAL TONARM MECHANISM (The Heart of a Beogram)
COMPLETE MECHANICAL RESTORATION (Model-Specific):
- Carriage & Rail Cleaning: I fully disassemble the sliding carriage mechanism, clean off all hardened, gummed grease from the steel rails. Re-lubricate with an appropriate damping grease to ensure silent, friction-free travel.
- Drive Belt & Gear: I replace the worn-out drive belt that moves the arm across the record. On 6000 models, the belt is often smaller and requires precision tensioning.
- Arm Lift Service: For 4002/4004, I service or replace the solenoid. I replace any failing driver transistors and recap the solenoid timing/control circuit. For 6000, I service the servo lift motor and check the gear train for wear.
- Calibration: Using a protractor and test records, I re-calibrate the tonearm to have less than 0.04° of tracking error (4000 series) or less than 0.06° (6000), set the correct VTA, and perfectly align the anti-skate tracking force to factory spec.
Bang & Olufsen Beogram Models – Technical Specifications
| Parameter | 4000 (1972-74) | 4002 (1974-78) | 4004 (1978-80) | 6000 (1982-86) |
|---|
| Drive System
| Belt drive
| Belt drive
| Belt drive
| Belt drive
|
| Motor Type
| Papst AC synchronous
| AC (early) / DC servo (late)
| DC servo
| Quartz-locked DC servo
|
| Wow & Flutter (DIN)
| < ±0.025%
| < ±0.05%
| < ±0.05%
| < ±0.04%
|
| Rumble (DIN B)
| > 65 dB
| > 65 dB
| > 65 dB
| > 68 dB
|
| Tracking Error
| < 0.04°
| < 0.04°
| < 0.04°
| < 0.06°
|
| Cartridge Compatibility
| MMC4000, MMC20CL, MMC20EN
| MMC20CL, MMC20EN, MMC20E
| MMC20CL, MMC20EN, MMC20E
| MMC20CL, MMC20EN, MMC4000
|
| Dimensions (W x H x D)
| ~19" x 5" x 15"
| 18.8" x 3.75" x 15.5"
| 18.8" x 3.75" x 15.5"
| 17.5" x 3.2" x 14.5"
|
| Weight
| ~22 lbs
| ~15 lbs
| ~15 lbs
| ~12 lbs
|
Nationwide Service – We Ship Turntables Across America
🇺🇸 NATIONWIDE SERVICE AVAILABLE 🇺🇸
Ship your Beogram turntable securely – I serve all 50 states
I've restored Beogram 4000-series and 6000 turntables for clients nationwide:
- Secure Packaging: I'll provide detailed packing instructions to ensure your turntable arrives safely (including securing the delicate tonearm).
- Insured Shipping: I recommend fully insured shipping for your valuable turntable.
- Nationwide Reach: No matter where you are in the United States, I can restore your Beogram to factory specifications.
- Model-Specific Expertise: I know the specific concerns of the 4000, 4002, 4004, and 6000.
Frequently Asked Questions – Beogram 4000, 4002, 4004 & 6000
❓ Which Beogram turntable is considered the best?
The Beogram 4000 is widely regarded as the most over-engineered "best" in terms of pure build quality, using heavy-gauge Swiss metal parts and a superior Papst AC motor. The Beogram 4004 is the most refined of the 4000 series with a better secured arm and a modern DC motor, generally the most reliable for everyday use. The Beogram 6000 offers the sleekest design and quartz-locked speed accuracy, but its arm mechanism is more delicate and harder to repair.
❓ My Beogram is behaving erratically or not completing its cycle. What's wrong?
It's almost certainly a combination of two age-related problems: 1) Degraded electrolytic capacitors in the power supply are causing logic glitches, and 2) The grease on the sliding tonearm carriage rails has turned to glue, jamming the mechanism. I will fully correct both issues.
❓ The turntable powers on, but the arm won't drop or lower. What can I fix?
On 4002/4004, this is often a weak solenoid or a failing capacitor in the solenoid timing circuit. On 6000, it's usually a failed servo lift motor or a broken gear. Both require detailed electronic/mechanical service.
❓ Do you service the MMC cartridge?
I can assess its condition, check for suspension sag, and replace the stylus if you have a specific brand/model requirement, though replacement styli are increasingly rare. If the cartridge internal coils are damaged, a full re-tip is required.
❓ What type of motor does my Beogram have? 4000 vs 4004 vs 6000?
The very rare and sought-after Beogram 4000 uses a premium Swiss-made Papst AC synchronous motor (with a strobe for visual speed verification). The later Beogram 4002 (late revisions) and all Beogram 4004s use a more standard but very reliable servo-controlled DC motor. The Beogram 6000 uses a quartz-locked DC servo motor for improved speed accuracy.
❓ Do you warranty your restoration work?
Yes, I provide a comprehensive 90-day warranty on all parts and labor for your Beogram 4000, 4002, 4004, or 6000 turntable. I stand behind every restoration.
❓ How can I contact you directly for a quote or to discuss shipping?
Call me at (818) 244-4440 or email jt@tekmg.com. I'm happy to discuss your specific model and its symptoms.
My Service Area – Local & Nationwide
🇺🇸 NATIONWIDE SERVICE AVAILABLE 🇺🇸
Ship your Beogram 4000, 4002, 4004 or 6000 securely – I serve all 50 states
Local Service: Los Angeles County, Orange County, Ventura County, Riverside County, San Bernardino County.
Nationwide Service: Secure shipping options with detailed packing instructions for your turntable.
Los Angeles County: LA Burbank Glendale Santa Monica Hollywood Pasadena
Nationwide: NY TX FL IL WA All 50 States
TEK Media Group — Bang & Olufsen Restoration Since 1994
📞 (818) 244-4440 | ✉️ jt@tekmg.com
Bang & Olufsen Beogram 4000 / 4002 / 4004 / 6000 Specialist • Tangential Arm Restoration • Full Electronic Rebuild • Motor Service • 30+ Years Experience
Every Beogram gets my personal attention – I'm the technician who does the work. Email me at jt@tekmg.com.
I'm the owner and lead technician at TEK Media Group, and I've been restoring high-end audio equipment since 1994. The Bang & Olufsen Beogram 4000, 4002, 4004, and 6000 are legendary linear-tracking turntables representing the pinnacle of Danish hi-fi design. I offer complete restoration: full recap, tangential arm service, electronic rebuild, motor overhaul, MMC cartridge assessment, mechanical rail & belt replacement, and precision calibration to bring these iconic turntables back to their original performance. Every Beogram that comes to my bench receives my personal attention. I serve customers nationwide – just ship your turntable to my Los Angeles facility.