📍 Los Angeles County & SoCal
🔧 30+ Years Experience
🎚️ High-End Digital Specialist
🏢 TEK Media Group
📋 TECHNICAL DISCLAIMER: The Mark Levinson No. 30 and No. 30.5 are complex dual-chassis (transport + processor) reference CD players. They contain sensitive digital and analog circuitry requiring specialized knowledge and test equipment. I have the expertise, documentation, and parts access to restore these units correctly.
⚠️ CRITICAL WARNING – MARK LEVINSON SPECIFIC: The No. 30 series uses proprietary Philips CDM-9 Pro and CDM-12 Pro transports, with complex servo and digital filtering (DF1700) and DAC sections (PCM63P-K). Capacitors in the power supply, servo board, and analog stages degrade over time, causing read errors, noise, and performance loss. I provide a thorough, methodical restoration to factory specifications.
About the Mark Levinson No. 30 / 30.5 & My Approach
The Mark Levinson No. 30 and No. 30.5 (the latter with HDCD decoding) are legendary reference CD processors from the golden age of digital audio (1992-1999). The No. 30 set new standards for CD playback, featuring a dual-chassis design (transport and DAC separate), Philips CDM-9 Pro or CDM-12 Pro transport, dual PCM63P-K DACs, and a massive power supply. Known for their incredible musicality, low jitter, and robust build, these units remain highly sought after. I've restored dozens of Mark Levinson digital components over three decades, and I treat each unit with meticulous care, using premium replacement parts while preserving the original sonic character.
✅ WHY TRUST TEK MEDIA GROUP WITH YOUR MARK LEVINSON NO. 30/30.5:
- 30+ Years of High-End Digital Audio Restoration Experience
- Specialized Knowledge of Mark Levinson DAC & Transport Systems
- Complete Transport Overhaul (CDM-9 Pro / CDM-12 Pro)
- Full Capacitor Replacement: Power Supply, Servo, Digital, Analog Stages
- Laser Pickup Alignment & Focus/Gain Adjustments
- DAC & Analog Stage Calibration (PCM63P-K, DF1700)
- Precision Clock & Jitter Optimization
- 100% Personal Attention – No Assembly Line
- 90-Day Warranty on All Work
- Local Service Throughout Southern California
Complete Mark Levinson No. 30/30.5 Restoration Services
🔍 Full Diagnostic & Evaluation Complete assessment, transport performance check, capacitor health, baseline measurements
⚡ Power Supply Rebuild (Both Chassis) Replace all electrolytic capacitors, bridge rectifiers, voltage regulators, and critical resistors
🔄 Transport Overhaul (CDM-9 Pro / CDM-12 Pro) Full disassembly, cleaning, lubrication, belt replacement, laser pickup alignment
🎛️ Digital Board Restoration Capacitor replacement, clock circuit optimization, servo calibration
🔊 Analog Stage Recap & Upgrade Replace all electrolytic caps with audio-grade types, check op-amps, verify DC offset
📀 Laser Alignment & Focus/Gain Calibration Precision adjustment of laser power, focus offset, and tracking gain
🎵 DAC Calibration (PCM63P-K) Verify reference voltages, I/V stage performance, distortion measurement
🏆 COMPLETE FULL RESTORATION All services above – your No. 30/30.5 will perform to original reference specifications
💡 WHAT MY RESTORATION INCLUDES: Full electrolytic recap (both chassis) • Transport belt & lubrication • Laser alignment (if needed) • Clock verification • Analog stage recap with audio-grade caps • Power supply rebuild • 90-day warranty.
Deep Dive: My Mark Levinson No. 30/30.5 Restoration Process
⚡ POWER SUPPLY (Critical for Low Noise)
- Main Filter Capacitors: Large snap-in electrolytics in the DAC and transport chassis – I replace with high-ripple, low-ESR, 105°C rated types (Nichicon KG, Panasonic, or Cornell Dubilier).
- Regulator Section: I replace all small electrolytic capacitors on the regulator boards, verify voltage rails (±15V, +5V, +5VA, etc.) within tolerance.
- Bridge Rectifiers: I test and replace if noisy, upgrade to ultra-fast soft recovery types for lower noise.
- AC Input & Safety: I inspect AC input filter, replace RIFA caps if present, check fuses and IEC inlet.
🔄 PHILIPS CDM-9 PRO / CDM-12 PRO TRANSPORT OVERHAUL
COMPLETE MECHANICAL & OPTICAL SERVICE:
- Disassembly & Cleaning: I fully disassemble the transport, clean old lubricants, and regrease sled mechanism and spindle motor bearings.
- Belt Replacement: The tray belt and sled belt are replaced with factory-spec or upgraded equivalents.
- Spindle Motor Check: I test spindle motor for noise and runout, replace if necessary (common failure).
- Laser Pickup Assessment: Using an oscilloscope, I measure the HF ("eye pattern") amplitude and jitter. I adjust laser power only if needed, or recommend replacement for worn pickups.
- Focus & Tracking Calibration: I adjust focus offset, tracking gain, and focus gain using a test CD and oscilloscope to factory specifications.
- CDM-12 Pro Specific: I address the common issue of the magnetic puck and spindle hub, ensure proper clamping.
🎛️ DIGITAL BOARD & SERVO ELECTRONICS
- Servo Board Capacitors: All electrolytic capacitors on the Philips CD servo board are replaced (typically 10-25 units).
- Decoupling Capacitors: I add or upgrade local decoupling on digital ICs to reduce noise.
- Clock Circuit: I verify the master clock (11.2896MHz or similar) for accuracy and jitter, replace crystal if drifted.
- DF1700 Digital Filter: I check power supply to the DF1700 filter, ensure clean decoupling.
- PCM63P-K DAC Section: I verify reference currents, check I/V converter op-amps, replace capacitors in the analog path.
🔊 ANALOG OUTPUT STAGE RESTORATION
- Coupling Capacitors: I replace electrolytic output coupling caps with high-quality film or bipolar audio-grade types (Nichicon ES, Elna Silmic II).
- Op-Amp Upgrade (Optional): Original op-amps (typically NE5534/OPA627) can be upgraded to modern low-noise types (OPA1611, OPA1656) if desired.
- Power Supply Decoupling: I add or replace local decoupling capacitors near each op-amp.
- DC Offset Check: I verify and adjust DC offset at outputs to near 0mV.
- HDCD Decoder (No. 30.5 specific): I check the PMD100 HDCD decoder operation, replace capacitors in its power supply.
Common Mark Levinson No. 30/30.5 Problems I Solve
#1 Transport Read Errors / Skipping
Symptom: Disc not recognized, skipping, clicking, failure to read TOC.
My Solution: Clean/lubricate transport, replace belts, adjust laser focus/tracking, replace spindle motor if worn, replace laser pickup if necessary.
#2 Capacitor Aging in Power Supply
Symptom: Increased noise, hum, intermittent operation, poor bass response.
My Solution: Complete recap of all electrolytic capacitors in both chassis (power supply, digital, and analog boards).
#3 No Audio Output / Distorted Audio
Symptom: One or both channels dead, distorted sound, low output.
My Solution: Check DAC reference voltages, replace failed op-amps, recap analog stage, verify relay operation.
#4 No Lock / Unstable Lock on Digital Inputs
Symptom: Input selector doesn't lock, intermittent playback.
My Solution: Check digital input receiver (CS8412/CS8414), replace capacitors in PLL circuit.
#5 Display Issues (Dim or Missing)
Symptom: VFD display dim or not working.
My Solution: Check filament voltage, replace driver capacitors, replace VFD if necessary (I have sources).
#6 Tray Mechanism Issues
Symptom: Tray won't open/close, grinding noise.
My Solution: Replace tray belt, clean and lubricate gears, adjust tray position switches.
#7 Remote Control Not Working
Symptom: No response to remote.
My Solution: Check IR receiver, replace electrolytic caps on front panel board.
Mark Levinson No. 30/30.5 – Component Overhaul Database
⚠️ Typical restoration: 100+ electrolytic capacitors replaced across both chassis. I use premium Japanese and USA-made audio-grade components.
POWER SUPPLY (DAC Chassis & Transport Chassis)
| Component | Original Type | My Restoration Replacement |
|---|
| Main Filter Caps (DAC) | 4700-10000µF @ 35-50V | Low ESR, 105°C, High Ripple (Nichicon KG / Cornell) |
| Regulator Board Caps | 47-1000µF @ 16-35V | Low Impedance, 105°C (Panasonic FC / Nichicon PW) |
| Small Signal Caps | 10-100µF @ 16V | Audio Grade (Nichicon FG / Elna Silmic II) |
DIGITAL BOARD & SERVO (Transport & DAC)
| Section | Capacitor Count | My Replacement |
|---|
| Philips CDM Servo Board | 15-20 electrolytics | Low ESR, long life (Panasonic FM / Nichicon HE) |
| DAC Board Decoupling | 10-15 small caps | Solid Polymer or Low ESR Electrolytic |
| DF1700 / PCM63P-K Supplies | 8-12 caps | Low noise, audio-grade (Nichicon FG / UKL) |
ANALOG OUTPUT STAGE
| Component | Original | My Upgrade |
|---|
| Output Coupling Caps | Electrolytic 47-220µF | Bipolar Audio Grade (Nichicon ES) or Film |
| Op-Amp Decoupling | 10-47µF Electrolytic | Low ESR + 0.1µF film bypass |
| Feedback Loop Caps | Small electrolytic | Polystyrene or Polypropylene film |
Precision Calibration & Alignment Procedure
📀 MY CALIBRATION PROCESS FOR NO. 30/30.5:
- Laser Alignment: Using an oscilloscope and Philips test CD (SBC 444A), I adjust laser power, focus offset, tracking gain, and focus gain to factory specifications. The HF "eye pattern" should be clear with amplitude >1.2V p-p.
- Spindle & Sled Servo: I verify and adjust spindle motor gain and sled servo for smooth, accurate tracking.
- Clock Verification: I measure master clock frequency and jitter using a frequency counter and jitter analyzer, replacing crystal if off-spec.
- DAC Calibration: For PCM63P-K, I verify the reference current (Iref) and adjust if necessary using trim pots.
- Analog Stage: I measure frequency response, distortion (THD+N), and signal-to-noise ratio, aiming for original specifications: THD+N <0.002%, S/N >110dB.
- Digital Inputs: I test all digital inputs (AES/EBU, SPDIF, Toslink) for proper lock and low jitter.
💡 NOTE: Proper calibration requires specialized test equipment (oscilloscope, frequency counter, distortion analyzer, test CDs). I have all the tools and 30+ years of experience to restore your No. 30/30.5 to reference-grade performance.
Frequently Asked Questions – Mark Levinson No. 30/30.5
❓ What's the difference between No. 30 and No. 30.5?
The No. 30.5 adds HDCD decoding (PMD100 chip) and has some circuit refinements. Both are reference-grade processors. I service both models with equal expertise.
❓ What transport mechanism does it use?
Early units used Philips CDM-9 Pro (swing-arm), later units used CDM-12 Pro. Both are excellent but require specialized service. I work on both.
❓ How long does a full restoration take?
Typically 4-6 weeks due to the complexity of dual-chassis and transport alignment. Rush service available.
❓ Do you offer pickup and delivery in Southern California?
Yes, for Los Angeles, Orange County, Ventura, Riverside, San Bernardino, and surrounding areas.
❓ Can you replace the laser pickup?
Yes, I have access to genuine or high-quality replacement laser pickups for both CDM-9 Pro and CDM-12 Pro transports.
❓ Do you have spare parts for the No. 30 series?
Yes, I've accumulated a stock of belts, capacitors, op-amps, and some transport parts over 30 years.
❓ Do you warranty your work?
Yes, 90-day warranty on all parts and labor. I stand behind every restoration.
Mark Levinson No. 30 / 30.5 Specifications
| Parameter | Specification |
|---|
| DAC Chips | PCM63P-K (dual, 20-bit) |
| Digital Filter | DF1700 / PMD100 (No. 30.5) |
| Frequency Response | 2Hz-22kHz ±0.1dB |
| THD+N | <0.002% (1kHz) |
| Signal-to-Noise | >110dB |
| Dynamic Range | >100dB |
| Channel Separation | >110dB |
| Digital Inputs | AES/EBU, SPDIF (RCA), Toslink |
My Service Area – Southern California
I serve Los Angeles County, Orange County, Ventura County, Riverside County, San Bernardino County, and surrounding areas. Local pickup and delivery available.
Los Angeles County: LA Burbank Glendale Santa Monica Hollywood Pasadena
Orange County: Santa Ana Anaheim Irvine Costa Mesa Huntington Beach
Ventura & Inland Empire: Ventura Thousand Oaks Riverside San Bernardino Ontario
TEK Media Group — High-End Digital Audio Restoration Since 1994
📞 (818) 244-4440 | ✉️ service@tekmediagroup.com
Serving Los Angeles, Orange County, Ventura, Riverside, San Bernardino, and all of Southern California
Specializing in Mark Levinson, Krell, Wadia, Theta, and High-End Digital Components
Mark Levinson No. 30/30.5 Specialist • CD Transport & DAC Restoration Expert
