Marantz DV6400 Service Manual

The Marantz DV6400 is a high-performance universal DVD player featuring SACD and DVD-Audio playback capabilities, progressive scan video output, component video, composite video, S-Video outputs, coaxial and optical digital audio outputs, RS-232 control interface, and advanced audio/video processing. This service manual provides technical information for qualified service personnel including schematics, alignment procedures, troubleshooting guides, and parts lists.

1. Technical Specifications 2. Block Diagrams 3. Circuit Descriptions 4. Disassembly Procedures 5. Test Modes & Service Adjustments 6. Troubleshooting Flowcharts 7. PCB Layouts 8. Schematic Diagrams 9. Parts List 10. Service Notes 11. Firmware Updates

Technical Specifications

Detailed technical specifications and performance characteristics of the Marantz DV6400 universal DVD player.

ParameterSpecification
Disc CompatibilityDVD-Video, DVD-Audio, SACD, CD, CD-R/RW, MP3, WMA
Video OutputsComponent, Composite, S-Video, Progressive Scan
Audio OutputsAnalog 5.1, Coaxial Digital, Optical Digital
Frequency Response4Hz-44kHz (SACD), 4Hz-22kHz (DVD-Audio)
Signal-to-Noise Ratio>115dB
Dynamic Range>100dB
Total Harmonic Distortion<0.002%
Power Supply120V AC, 60Hz, 25W
Dimensions440mm x 315mm x 97mm (WxDxH)
Weight5.8kg

Block Diagrams

System block diagrams showing signal flow and major functional blocks.

  1. Main System Block Diagram: Shows overall system architecture
  2. Power Supply Block Diagram: AC/DC conversion and regulation
  3. Audio Processing Block: DACs, analog output stages
  4. Video Processing Block: Video DACs, output circuitry
  5. Digital Servo Block: Laser pickup control and disc mechanism

WARNING! These diagrams are for qualified service personnel only. Incorrect servicing may cause damage or void warranty.

Circuit Descriptions

Detailed descriptions of major circuit sections and their operation.

  1. Power Supply Circuit: Switching power supply with multiple voltage rails
  2. Main Processor: System control and user interface
  3. Digital Signal Processor: Audio and video decoding
  4. Servo Control: Disc rotation and laser tracking
  5. Output Stages: Analog and digital output circuits

CAUTION! High voltages present in power supply section. Disconnect power before servicing.

Disassembly Procedures

Test Modes & Service Adjustments

Access service mode by pressing and holding STOP and PLAY simultaneously while powering on. Use remote control for navigation.

Service Menu Options: Laser Power Adjustment, Focus/Tracking Offset, Disc Speed Calibration, Output Level Calibration, Factory Reset.

Test Points: TP1 (5V), TP2 (3.3V), TP3 (12V), TP4 (GND), TP5 (RF Signal), TP6 (Focus Error), TP7 (Tracking Error).

Troubleshooting Flowcharts

Systematic troubleshooting procedures for common failure modes.

SymptomPossible CauseCorrective Action
No PowerPower supply failureCheck fuse F001, measure DC outputs, replace power board if necessary
No Disc RecognitionLaser assemblyClean lens, check laser power, replace pickup if defective
No Video OutputVideo processorCheck video DAC IC201, output transistors Q101-Q103
No Audio OutputAudio circuitsVerify audio DAC IC301, check op-amps IC302-IC304
Disc Loading IssuesMechanismCheck loading motor, belt, mechanism alignment

PCB Layouts

Printed circuit board layouts for all major assemblies.

  1. Main Board (A Board): Component placement and routing
  2. Power Supply Board (B Board): High voltage section isolation
  3. Front Panel Board (C Board): Display and button interfaces
  4. Audio Board (D Board): Analog output circuitry

Tip: Use magnifying glass for identifying small components and trace routing.

Schematic Diagrams

Complete schematic diagrams for all circuit sections.

  1. Power Supply Schematic: AC input to DC outputs
  2. Main Processor Schematic: CPU and peripheral circuits
  3. Memory Schematic: RAM and ROM interfaces
  4. Audio DAC Schematic: Digital to analog conversion
  5. Video Output Schematic: Video processing and outputs
  6. Servo Control Schematic: Disc mechanism control

WARNING! Schematics contain proprietary information. For service use only.

Parts List

Complete listing of all components with manufacturer part numbers.

Part NumberDescriptionQty
IC001Main Processor MN103SF49G1
IC201Video DAC ADV7320KU1
IC301Audio DAC CS4396-KS1
PU001Laser Pickup KHS-180A1
F001Fuse 2A 250V1
C101-C105Capacitor 1000μF 25V5
Q101-Q103Transistor 2SC2412K3

Service Notes

Important service notes and common repair procedures.

Laser Replacement: Always discharge static before handling laser assembly. Adjust laser power after replacement.

Board Replacement: Transfer EEPROM IC102 when replacing main board to retain settings.

Firmware Recovery: Use service mode firmware update procedure if unit fails to boot.

Firmware Updates

Firmware update procedures and version history.

  1. Current Version: V1.25 (March 2005)
  2. Update Method: Service disc or RS-232 connection
  3. Update Procedure: Enter service mode, select firmware update
  4. Precautions: Do not interrupt power during update

Service Contact: Authorized Marantz Service Centers only

Support: www.marantz.com | Service Department: 1-800-654-6633

Marantz DV6400 Service Manual © - All Rights Reserved 2025