Marantz SR5005 Service Manual

The Marantz SR5005 is a high-performance AV receiver featuring 7.1 channel surround sound, 110W per channel, HDMI connectivity with 3D support, Audyssey MultEQ room correction, network audio streaming, and multi-zone capability. This service manual provides detailed technical information for service technicians, including schematics, alignment procedures, and troubleshooting guidelines.

1. Technical Specifications 2. Block Diagrams 3. Circuit Descriptions 4. Disassembly Procedures 5. Alignment and Adjustment 6. Test Points and Measurements 7. Parts List 8. PCB Layouts 9. Troubleshooting Flowcharts 10. Firmware Update Procedures 11. Safety Precautions

Technical Specifications

Detailed technical specifications for the Marantz SR5005 AV receiver.

ParameterSpecification
Power Output110W per channel (8Ω, 20Hz-20kHz, 0.08% THD)
Surround System7.1 channel Dolby TrueHD, DTS-HD Master Audio
HDMI Inputs/Outputs6 inputs / 1 output (v1.4a with 3D support)
Video ConversionAnalog to HDMI upscaling to 1080p
Network FeaturesEthernet, Wi-Fi ready, DLNA 1.5 certified
Audio DecodingDolby Digital Plus, DTS-HD, Audyssey DSX
Room CorrectionAudyssey MultEQ, Dynamic Volume, Dynamic EQ
Multi-zoneZone 2 audio and video capability
Power Consumption600W maximum, 65W standby
Dimensions440 x 395 x 171 mm (W x D x H)

Block Diagrams

System block diagrams showing signal flow and component interconnections.

  1. Main System Block Diagram: Shows overall signal path from inputs to outputs
  2. Audio Processing Block: Detailed DSP and decoding circuitry
  3. Power Supply Block: Switching power supply and regulation circuits
  4. HDMI Processing Block: Video switching and processing paths
  5. Amplifier Section: 7-channel power amplifier topology

WARNING! Always refer to block diagrams before attempting repairs to understand signal flow.

Circuit Descriptions

Detailed descriptions of major circuit sections and their operation.

  1. Power Supply Circuit: Switching regulator with multiple voltage outputs
  2. Digital Audio Board: 32-bit DSP processing and decoding
  3. HDMI Board: Video switching and processing circuitry
  4. Amplifier Circuits: Discrete 7-channel power amplifier design
  5. Control System: Microprocessor and user interface circuits

CAUTION! High voltage present in power supply section - discharge capacitors before servicing.

Disassembly Procedures

Alignment and Adjustment

Factory alignment procedures and service adjustments.

Test Equipment Required: Audio analyzer, oscilloscope, multimeter, test discs

DC Offset Adjustment: Adjust VR801-VR807 for 0mV ±5mV at speaker terminals. Bias Current Adjustment: Set idle current to 10mA using bias test points. HDMI Output Level: Adjust video output levels for proper signal amplitude. Network Settings: Factory network configuration and IP address setup.

Test Points and Measurements

Key test points and expected voltage/waveform measurements.

  1. Power Supply Test Points: +12V, +5V, +3.3V, ±15V rails
  2. Amplifier Test Points: DC offset, bias current, output signals
  3. Digital Audio Test: I2S signals, clock frequencies, data lines
  4. HDMI Test Points: TMDS signals, clock, HDCP verification
  5. Microprocessor: Reset circuit, clock oscillators, communication buses

Tip: Use proper grounding techniques when making measurements to avoid damage.

Parts List

Complete component listing with manufacturer part numbers.

  1. Semiconductors: Transistors, ICs, diodes with original part numbers
  2. Passive Components: Resistors, capacitors, inductors values and tolerances
  3. Mechanical Parts: Screws, connectors, brackets, heat sinks
  4. Custom Components: Proprietary ICs and specialized parts
  5. Recommended Replacements: Approved substitute components
  6. Power Devices: Output transistors and driver ICs
  7. Connectors: All input/output and internal connectors

WARNING! Use only Marantz-approved replacement parts to maintain performance and safety.

PCB Layouts

Printed circuit board layouts for all major assemblies.

Main Board: Component placement and routing for digital and analog sections. Power Supply Board: High-voltage layout with proper clearance. Amplifier Board: Output stage layout with thermal considerations. HDMI Board: High-speed digital layout techniques. Front Panel: Control and display circuitry layout.

Troubleshooting Flowcharts

Systematic troubleshooting procedures for common failures.

SymptomPossible CauseCorrective Action
No powerPower supply failureCheck AC input, fuse, main switching IC, output voltages
No audio outputAmplifier/protection circuitVerify speaker protection relay, check amplifier ICs, test points
HDMI no signalHDMI board failureCheck HDMI IC power, input detection, HDCP authentication
Network not workingNetwork interfaceVerify Ethernet PHY, network processor, firmware
OverheatingCooling systemCheck fan operation, heat sink contact, bias current

Reset Procedures: Factory reset combinations and service mode access.

Firmware Update Procedures

Service firmware update methods and recovery procedures.

USB Update: Using service firmware files on USB drive. Network Update: Direct firmware download via Ethernet. Recovery Mode: Procedures for corrupted firmware recovery. Version Checking: How to verify current firmware version. Update Log: Record of firmware changes and fixes.

Safety Precautions

Essential safety information for service personnel.

High Voltage Warning: Line voltage present in power supply - use isolation transformer. ESD Protection: Use anti-static equipment when handling circuit boards. Thermal Safety: Allow unit to cool before servicing - heat sinks can cause burns. Component Orientation: Observe polarity markings on electrolytic capacitors. Test Equipment: Use properly grounded test equipment.

Service Support: Contact Marantz technical support for additional assistance.

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