Marantz DV6500 Service Manual

The Marantz DV6500 is a high-performance universal DVD player featuring SACD and DVD-Audio playback capabilities, progressive scan video output, high-quality audio DACs, component video outputs, coaxial and optical digital audio outputs, RS-232 control interface, and advanced video processing. This service manual provides technical specifications, disassembly instructions, circuit diagrams, troubleshooting procedures, and calibration guidelines for qualified service technicians.

Technical Specifications

Detailed technical specifications for the Marantz DV6500 universal DVD player.

Parameter	Specification
Disc Compatibility	DVD-Video, DVD-Audio, SACD, CD, CD-R/RW, MP3, WMA
Video DAC	12-bit/108MHz
Audio DAC	192kHz/24-bit for stereo, 96kHz/24-bit for multi-channel
Video Outputs	Component, S-Video, Composite
Audio Outputs	Coaxial digital, Optical digital, 5.1 analog
Frequency Response	4Hz-44kHz (SACD), 4Hz-22kHz (CD)
Signal-to-Noise Ratio	115dB
Dynamic Range	100dB
Total Harmonic Distortion	0.002%
Power Requirements	120V AC, 60Hz, 25W

Safety Precautions

Critical safety information for service technicians.

1. Disconnect AC power before performing any service procedures.
2. Use proper ESD protection when handling circuit boards.
3. Ensure proper grounding of test equipment.
4. Replace safety components only with specified parts.
5. Verify insulation and clearance distances after reassembly.

WARNING! High voltages present in power supply section. Only qualified technicians should perform service procedures.

Disassembly Procedures

Step-by-step instructions for disassembling the DV6500.

1. Remove four screws from bottom panel.
2. Carefully lift top cover upward and remove.
3. Disconnect front panel ribbon cables from main board.
4. Remove drive mechanism mounting screws.
5. Lift drive assembly vertically to disconnect.
6. Remove main board mounting screws and standoffs.

CAUTION! Handle optical pickup mechanism with care. Avoid touching lens surface.

Circuit Diagrams

Complete schematic diagrams for all circuit sections.

• Power Supply: Switching regulator circuit with protection.
• Digital Section: Main processor and memory circuits.
• Audio Section: DAC and analog output stages.
• Video Section: Video processing and output circuits.
• Drive Control: Spindle and sled motor drivers.
• Front Panel: Display and control interface.

PCB Layouts

Printed circuit board layouts for main board and power supply.

Main Board: 6-layer design with separate analog and digital grounds.

Power Supply Board: Single-sided design with thermal management.

Front Panel Board: Double-sided with LED display drivers.

Component designators match schematic diagrams. Ground planes clearly marked. Test points identified with TP designations.

Component Locations

Reference guide for locating components on PCBs.

1. Main processor IC201 located center of main board.
2. Memory IC202-IC204 adjacent to processor.
3. Audio DAC IC501 near analog output connectors.
4. Video encoder IC301 near video output section.
5. Power regulators IC101-IC103 on power supply board.
6. Optical pickup connector CN901 on drive interface.

Tip: Use component location diagrams for accurate part identification.

Test Points & Measurements

Critical test points and expected voltage measurements.

Test Point	Description	Normal Value
TP101	+12V supply	12.0V ±5%
TP102	+5V digital	5.0V ±3%
TP103	+3.3V	3.3V ±3%
TP104	-12V analog	-12.0V ±5%
TP201	System clock	27MHz ±10ppm
TP301	Video output	1.0Vp-p composite
TP501	Audio reference	2.5V DC

Adjustment Procedures

Factory adjustment and calibration procedures.

1. Laser power adjustment: Measure current at test point TP901.
2. Tracking balance: Use alignment disc and oscilloscope.
3. Focus bias: Adjust for maximum RF signal amplitude.
4. Audio output level: Calibrate using 1kHz test tone.
5. Video output level: Adjust color burst amplitude.
6. Service mode access: Power on while holding STOP and PLAY.

WARNING! Laser radiation present. Do not view optical pickup directly.

Troubleshooting Guide

Systematic troubleshooting procedures for common issues.

Symptom	Possible Cause	Corrective Action
No power	Fuse, power supply	Check F101, measure TP101-TP104 voltages
No disc recognition	Laser, spindle motor	Clean lens, check focus/tracking, verify motor operation
No video output	Video encoder, cables	Check IC301, verify output signals at TP301
No audio output	DAC, output stage	Verify IC501 operation, check analog output circuits
Intermittent operation	Power supply, connections	Check for cold solder joints, verify connector seating

Parts List

Complete listing of replacement parts and components.

• Main Board Assembly: Part # DV6500-MB-01
• Power Supply Board: Part # DV6500-PS-01
• Drive Mechanism: Part # DV6500-DM-01
• Front Panel Assembly: Part # DV6500-FP-01
• Remote Control: Part # RC9000DV
• Optical Pickup: Part # KHS-180A
• Main Fuse: T2A/250V (F101)
• Power Transformer: Part # PT-2034

Service Notes

Important service information and technical updates.

Firmware updates available via service port. Use RS-232 cable and Marantz service software. Latest firmware version: 2.1.4

Common issue: Cold solder joints on power supply connectors. Reinforce with additional solder during repair.

Service bulletins: SB-065 for improved disc compatibility. SB-072 for audio dropout fix.

Service Support: Marantz Technical Support: 1-800-654-6633

Document Revision: 1.2 - Updated 2025