Marantz SR6005 Service Manual

The Marantz SR6005 is a high-performance AV receiver featuring 7.2 channel processing, 110W per channel, advanced audio processing with Dolby TrueHD and DTS-HD Master Audio, HDMI connectivity with 4K upscaling, network streaming capabilities, Audyssey MultEQ XT room calibration, and multi-zone audio. Below are key sections for technical specifications, service procedures, troubleshooting, and maintenance guidelines.

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

Technical Specifications

Key technical parameters and performance characteristics of the Marantz SR6005 AV receiver.

Parameter	Specification
Power Output	110W per channel (8 ohms, 20Hz-20kHz, 0.08% THD)
Audio Decoding	Dolby TrueHD, DTS-HD Master Audio, Dolby Digital Plus
HDMI Inputs/Outputs	6 inputs, 2 outputs (v1.4a with 3D and ARC)
Video Processing	4K upscaling, Analog to HDMI conversion
Network Features	Ethernet, Wi-Fi ready, DLNA 1.5 compatible
Room Correction	Audyssey MultEQ XT, Dynamic Volume, Dynamic EQ
Multi-zone	Zone 2 audio, HDMI zone switching
Power Consumption	650W maximum, 0.3W standby
Dimensions	440 x 395 x 171 mm (W x D x H)
Weight	12.5 kg

Block Diagrams

System architecture and signal flow diagrams for service and diagnostic purposes.

Main System Block Diagram: Shows overall signal processing path
Audio Processing Block: Detailed audio DSP and amplification stages
Video Processing Block: HDMI and analog video processing paths
Power Supply Block: Complete power distribution system
Control System Block: Microprocessor and user interface architecture

WARNING! Always reference block diagrams when tracing signal paths during service procedures.

Disassembly Procedures

Step-by-step instructions for safe disassembly of the Marantz SR6005 receiver.

Remove top cover: Unscrew 6 Phillips screws on rear panel and 2 on sides
Remove front panel: Disconnect ribbon cables carefully after releasing latches
Access main board: Remove shield plate and disconnect all connectors
Remove power supply: Discharge capacitors and disconnect AC input
Access amplifier section: Remove heat sink mounting screws

CAUTION! Always disconnect AC power and discharge large capacitors before disassembly.

Circuit Descriptions

Power Supply Circuit: Switching power supply with multiple voltage rails
Amplifier Section: Discrete power amplifier design with current feedback
Audio Processing: 32-bit floating point DSP with HD audio decoding
HDMI Board: Separate video processing board with Silicon Image chipset
Network Interface: Ethernet controller with optional Wi-Fi module
Control System: Main microprocessor with flash memory
Protection Circuits: DC detection, thermal protection, short circuit protection

Test Points and Measurements

Critical test points and measurement procedures for performance verification.

Power Supply Test Points: +12V, +5V, +3.3V, +48V (amplifier rails)

Audio Test Points: Pre-out levels, amplifier outputs, DSP input/output

Measurement Procedures: Power output verification, THD measurement, frequency response, signal-to-noise ratio. Use calibrated audio analyzer and oscilloscope for accurate measurements.

Alignment Procedures

Factory alignment and calibration procedures for optimal performance.

Power supply calibration: Adjust +B voltage to specified levels
Amplifier bias adjustment: Set idle current for each channel
HDMI signal alignment: Verify signal integrity and timing
Network calibration: Test network interface functionality
Audio calibration: Verify DSP processing and channel balance

Tip: Use factory service mode for advanced calibration procedures.

Parts List

Complete list of replacement parts and components for service.

Part Number	Description	Qty
PS6005-01	Power Supply Board Assembly	1
AMP6005-01	Amplifier Module Complete	1
DSP6005-01	Audio Processing Board	1
HDMI6005-01	HDMI Interface Board	1
TR-2SC5200	Output Transistor	14
CAP-10000uF	Main Filter Capacitor	2
FUSE-8A	AC Line Fuse	1
DISPLAY-6005	Front Panel Display	1

PCB Layouts

Printed circuit board layouts for all major assemblies.

Main Board: Top and bottom layer views with component placement
Power Supply Board: Complete layout with high-voltage sections marked
Amplifier Board: Output stage and heat sink mounting details
HDMI Board: High-speed digital circuit layout
Front Panel: Display and control interface layout

WARNING! Observe ESD precautions when handling PCBs. Use proper grounding.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
No power	Power supply failure	Check AC input, fuses, main switching transistors
No audio output	Amplifier/protection circuit	Verify protection relay operation, check output transistors
HDMI no signal	HDMI board failure	Check HDMI board power, replace HDMI chipset
Network not working	Network interface	Verify Ethernet controller, check network settings
Overheating	Cooling system	Clean heat sinks, check fan operation, verify bias current
Distorted audio	Amplifier stage	Check output transistors, verify power supply voltages

Reset Procedure: Press and hold TONE and STATUS buttons while powering on.

Firmware Update Procedures

Methods for updating receiver firmware to latest versions.

Network Update: Connect to internet and use menu system update function. USB Update: Download firmware to USB drive, insert in front panel USB port. Service Update: Using RS-232 service port with factory update software.

Safety Precautions

Essential safety guidelines for service technicians.

HIGH VOLTAGE WARNING! Power supply contains lethal voltages. Always disconnect AC power and discharge capacitors. Use isolation transformer for live measurements. Follow ESD protection procedures. Use proper tools and test equipment.

Service Support: Contact Marantz service department for technical assistance and genuine replacement parts.