Marantz TT 2000 Service Manual

The Marantz TT 2000 is a high-quality turntable featuring a belt-drive system, adjustable tonearm, anti-skate control, variable speed adjustment, and precision quartz speed control. This service manual provides comprehensive technical information for qualified service technicians, including schematics, alignment procedures, parts lists, and troubleshooting guides for proper maintenance and repair.

1. Technical Specifications 2. Safety Precautions 3. Disassembly Procedures 4. Circuit Diagrams 5. Mechanical Adjustments 6. Electrical Measurements 7. Parts Replacement 8. Alignment Procedures 9. Troubleshooting Guide 10. Parts List 11. Service Notes

Technical Specifications

Detailed technical specifications and performance characteristics of the Marantz TT 2000 turntable.

Parameter	Specification
Drive System	Belt drive with DC motor
Speeds	33 1/3, 45, 78 RPM
Speed Control	Quartz locked with pitch control
Wow & Flutter	≤0.05% WRMS
Signal-to-Noise Ratio	≥78 dB (DIN B)
Tonearm Type	S-shaped static balanced
Effective Length	228 mm
Overhang	15 mm
Tracking Force Range	0-3 grams
Power Requirements	120V AC, 60Hz

Safety Precautions

Essential safety information for service technicians working on the Marantz TT 2000.

Always disconnect power before servicing.
Use proper grounding techniques when handling circuit boards.
Handle tonearm and cartridge with care to prevent damage.
Use appropriate tools for disassembly and reassembly.
Follow electrostatic discharge (ESD) precautions.

WARNING! High voltages present in power supply section. Exercise extreme caution when testing live circuits.

Disassembly Procedures

Step-by-step instructions for proper disassembly of the Marantz TT 2000 turntable.

Remove platter: Lift straight up while supporting underside.
Remove belt: Carefully stretch and remove from motor pulley.
Remove bottom cover: Remove four Phillips screws from underside.
Remove tonearm assembly: Disconnect wiring harness and remove mounting screws.
Access main board: Remove additional screws securing PCB mounting plate.

CAUTION! Label all connections and take photos during disassembly for proper reassembly.

Circuit Diagrams

Main Power Supply: Complete schematic with voltage specifications.
Motor Control Circuit: Quartz speed control and DC motor driver.
Control Panel: Speed selection and function controls.
Interconnection Diagram: Wiring between all major components.
PCB Layout: Component placement and trace routing.

Mechanical Adjustments

Procedures for mechanical alignment and calibration of the Marantz TT 2000.

Tonearm Adjustments: Vertical tracking angle, anti-skate calibration, bearing preload.

Platter Height: Adjust using sub-platter height adjustment screw. Belt Tension: Ensure proper tension for consistent speed. Motor Mounting: Check for proper alignment and isolation. Suspension: Verify proper isolation from external vibrations.

Electrical Measurements

Required test points and voltage measurements for proper operation.

Power Supply: Check all DC voltage outputs against specifications.
Motor Circuit: Verify proper voltage to DC motor at all speeds.
Quartz Reference: Check crystal oscillator frequency (4.19 MHz).
Control Signals: Verify proper logic levels from control panel.

Tip: Use calibrated test equipment for accurate measurements.

Parts Replacement

Guidelines for replacing critical components in the Marantz TT 2000.

Belt Replacement: Use genuine Marantz replacement belt for optimal performance.
Stylus Replacement: Follow manufacturer specifications for tracking force.
Motor Replacement: Ensure proper alignment and belt tension.
Capacitor Replacement: Use same or higher voltage/ temperature ratings.
IC Replacement: Use proper desoldering techniques to prevent board damage.

WARNING! Use only genuine Marantz replacement parts to maintain performance specifications.

Alignment Procedures

Detailed alignment procedures for optimal turntable performance.

Cartridge Alignment: Use alignment protractor for proper geometry. Azimuth Adjustment: Ensure cartridge is perpendicular to record surface. Vertical Tracking Force: Calibrate using precision scale. Anti-skate: Adjust to match tracking force. Speed Calibration: Verify accuracy using strobe disc.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
No power	Power supply failure	Check fuse, power switch, and regulator circuits.
Incorrect speed	Belt wear or motor issue	Replace belt; check motor control circuit.
Motor not starting	Start capacitor or driver IC	Test start circuit components; replace if faulty.
Speed fluctuation	Belt tension or motor stability	Adjust belt tension; check motor control feedback.
Tonearm issues	Bearing damage or wiring	Inspect bearings; check tonearm wiring continuity.

Reset: Power cycle unit to reset microprocessor if equipped.

Service: Authorized Marantz service centers only for warranty work.

Parts List

Complete list of replacement parts with manufacturer part numbers.

Drive Belt: MAR-BELT-2000
Platter Mat: MAR-MAT-2000
Cartridge: MAR-CART-2000
Power Supply Board: MAR-PSB-2000
Motor Assembly: MAR-MOT-2000
Tonearm Assembly: MAR-ARM-2000
Control Knobs: MAR-KNOB-2000
IC Components: Various manufacturer part numbers

Service Notes

Important service notes and technical updates for the Marantz TT 2000.

This manual is intended for qualified service technicians only. Unauthorized modifications may void warranty and affect performance. Always refer to latest service bulletins for updated information. Record all service performed including parts replaced and adjustments made.