Marantz SR5004 Service Manual

The Marantz SR5004 is a high-performance 7.1 channel AV receiver featuring 1080p upscaling, HDMI 1.3a connectivity, Audyssey MultEQ room correction, Dolby TrueHD and DTS-HD Master Audio decoding, network audio streaming, and 100W per channel. Below are key sections for technical specifications, service procedures, troubleshooting, and maintenance.

1. Technical Specifications 2. Block Diagrams 3. PCB Layouts 4. Circuit Diagrams 5. Disassembly Instructions 6. Test Procedures 7. Alignment Procedures 8. Parts List 9. Troubleshooting Guide 10. Firmware Updates 11. Safety Precautions

Technical Specifications

Key technical parameters and performance characteristics of the SR5004 receiver.

ParameterSpecification
Power Output100W per channel (8Ω, 20Hz-20kHz, 0.08% THD)
Frequency Response10Hz-100kHz (+1/-3dB)
HDMI Inputs6 inputs, 1 output (HDMI 1.3a)
Video Upscaling1080p from all sources
Audio DecodingDolby TrueHD, DTS-HD Master Audio
Room CorrectionAudyssey MultEQ
Network FeaturesEthernet, USB, internet radio
Dimensions440 x 395 x 167mm (W x D x H)
Weight12.5 kg
Power Consumption600W maximum

Block Diagrams

System architecture and signal flow diagrams for service analysis.

  1. Main System Block Diagram: Shows overall signal processing path
  2. Audio Processing Block: DSP and decoding sections
  3. Video Processing Block: HDMI and video scaling circuits
  4. Power Supply Block: Main and auxiliary power circuits
  5. Control System Block: Microprocessor and interface circuits

WARNING! High voltage present in power supply section. Disconnect AC power before servicing.

PCB Layouts

Printed circuit board layouts for main assemblies.

  1. Main Board (A1-1): Top and bottom layer views
  2. Power Supply Board (A2-1): Component placement and traces
  3. Front Panel Board (A3-1): Display and control circuits
  4. HDMI Board (A4-1): Video processing section
  5. Audio Output Board (A5-1): Amplifier and output stages

CAUTION! Use proper ESD protection when handling PCBs.

Circuit Diagrams

Disassembly Instructions

Step-by-step procedures for unit disassembly and reassembly.

Tools Required: Phillips screwdriver, Torx T10, plastic spudger, anti-static wrist strap.

  1. Remove top cover: 8 screws on rear and sides
  2. Remove front panel: 4 screws and disconnect ribbon cables
  3. Remove main board: 12 mounting screws and multiple connectors
  4. Remove power supply: 6 screws and high voltage connections
  5. Remove HDMI board: 4 screws and flex cable connections

Test Procedures

Factory test procedures and service verification tests.

  1. Power Supply Tests: Check all DC voltage outputs
  2. Audio Tests: Verify all channel outputs and distortion levels
  3. HDMI Tests: Check video switching and upscaling functions
  4. Network Tests: Verify Ethernet and streaming functions
  5. Control Tests: Check front panel and remote functions

Tip: Use calibrated test equipment for accurate measurements.

Alignment Procedures

Factory alignment and calibration procedures.

  1. DC Offset Adjustment: VR601-VR607 for each channel
  2. Bias Current Adjustment: VR701-VR707 for amplifier bias
  3. HDMI Output Adjustment: Video level and timing calibration
  4. Network Setup: IP configuration and service verification
  5. DSP Calibration: Digital signal processor alignment

WARNING! Use isolation transformer when making live adjustments.

Parts List

Complete list of replacement parts and components.

Part NumberDescriptionQty
IC1001Main DSP Processor1
IC2001HDMI Switch IC1
TR5001-5007Output Transistors14
C8001Main Filter Capacitor1
F1001Main Fuse 6.3A1
SW1001Power Switch1

Troubleshooting Guide

SymptomPossible CauseCorrective Action
No powerFuse, power supplyCheck F1001; measure standby voltage; check power supply IC
No audio outputAmplifier, protection circuitCheck speaker relays; measure amplifier voltages; test output transistors
No HDMI outputHDMI board, connectionsCheck HDMI board power; reseat cables; test HDMI switch IC
Network not workingEthernet port, settingsCheck network cable; test Ethernet PHY; verify IP settings
OverheatingVentilation, bias currentClean ventilation; check fan operation; adjust bias current

Firmware Updates

Procedures for firmware updates and software maintenance.

Update Methods: USB flash drive, network download, service tool

  1. Download latest firmware from Marantz service portal
  2. Copy to USB drive (FAT32 format)
  3. Insert USB in front panel port
  4. Enter service mode: Press TONE + STATUS while powering on
  5. Select firmware update from menu

CAUTION! Do not interrupt power during firmware update.

Safety Precautions

Important safety information for service technicians.

High Voltage Warning: Line voltages present in power supply. Use isolation transformer. Discharge large capacitors before servicing. Follow ESD protection procedures. Use specified replacement parts only.

Service Support: Contact Marantz technical support for service questions and parts ordering.

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