Marantz SR 5000 Service Manual

The Marantz SR 5000 is a high-performance audio/video receiver featuring Dolby Digital and DTS decoding, 5.1 channel amplification, multiple audio/video inputs, AM/FM tuner, remote control, and advanced audio processing. This service manual provides technical information for qualified service personnel including schematics, alignment procedures, troubleshooting guides, and replacement parts information.

1. Technical Specifications 2. Block Diagrams 3. Circuit Descriptions 4. Disassembly Instructions 5. Alignment Procedures 6. Test Points & Measurements 7. Replacement Parts List 8. PCB Layouts 9. Troubleshooting Flowcharts 10. Safety Precautions 11. Service Notes

Technical Specifications

Complete technical specifications and performance characteristics of the Marantz SR 5000 receiver.

ParameterSpecification
Power Output80W x 5 channels (8Ω, 20Hz-20kHz, 0.08% THD)
Frequency Response10Hz - 100kHz (+1/-3dB)
Total Harmonic Distortion0.08% (20Hz-20kHz at rated power)
Signal-to-Noise Ratio100dB (line input)
Input Sensitivity200mV (line), 2.5mV (phono MM)
Digital Inputs2 optical, 1 coaxial
Analog Inputs6 line level, 1 phono, 1 tape
Video Inputs3 composite, 2 S-Video
Dimensions440mm W x 151mm H x 378mm D
Weight10.5 kg

Block Diagrams

System block diagrams showing signal flow and functional relationships between circuit sections.

  1. Main System Block Diagram: Overview of entire receiver architecture
  2. Power Supply Block Diagram: AC/DC conversion and regulation
  3. Audio Processing Block: Digital decoding and analog processing
  4. Amplifier Section: Power amplification stages
  5. Tuner Section: AM/FM reception and processing
  6. Control System: Microprocessor and user interface

WARNING! For qualified service personnel only. High voltages present in power supply and amplifier sections.

Circuit Descriptions

Detailed circuit analysis and operational descriptions of major system components.

  1. Power Supply Circuit: Switching power supply with multiple voltage rails
  2. Main Amplifier Circuit: Discrete power amplifier design with protection
  3. Digital Audio Processor: Dolby Digital and DTS decoding ICs
  4. Pre-amplifier Stage: Analog signal conditioning and volume control
  5. Tuner Circuit: PLL synthesized AM/FM tuner with IF stages
  6. Microcontroller System: Main control processor and peripheral interfaces

CAUTION! Static sensitive components. Use proper ESD protection during service.

Disassembly Instructions

Alignment Procedures

Factory alignment procedures requiring specialized test equipment.

AlignmentTest EquipmentProcedure
FM TunerRF generator, distortion analyzerAdjust L101, L102 for maximum sensitivity
AM TunerRF generator, oscilloscopeAdjust T101 for peak amplitude
DC OffsetDigital multimeterAdjust VR501-VR505 for 0mV ±5mV
Bias CurrentDigital multimeterAdjust VR601-VR605 for 20mA ±2mA
Dolby LevelAudio analyzerAdjust VR201 for 200mV reference

Test Points & Measurements

Critical test points and expected voltage/current measurements for troubleshooting.

  1. Power Supply Test Points: TP1-TP8 with expected DC voltages
  2. Amplifier Section: Bias test points and DC offset measurement points
  3. Digital Section: Clock signals and processor reset lines
  4. Audio Path: Signal injection points for tracing audio problems
  5. Tuner Section: IF and detector test points

Tip: Always verify power supply voltages before proceeding with other measurements.

Replacement Parts List

Official Marantz part numbers and descriptions for service components.

Part NumberDescriptionQty
PSR5000-001Main Power Transformer1
PSR5000-002Output Transistor Set (5ch)1
PSR5000-003Main Processor IC1
PSR5000-004Front Panel Assembly1
PSR5000-005Power Supply PCB1
PSR5000-006Remote Control Unit1
PSR5000-007Volume Control Assembly1
PSR5000-008Tuner Module1

PCB Layouts

Printed circuit board layouts showing component placement and trace routing.

  1. Main Board PCB: Component side and solder side views
  2. Power Supply PCB: High voltage section isolation
  3. Front Panel PCB: Display and control interface
  4. Amplifier Module: Output stage component placement
  5. Tuner Board: RF section layout and grounding

WARNING! High voltage areas clearly marked. Observe safety precautions.

Troubleshooting Flowcharts

Systematic troubleshooting guides for common service issues.

SymptomPossible CauseCorrective Action
No PowerFuse, power supplyCheck F501, measure +5VSTBY, check Q501-Q504
No Audio OutputProtection circuit, mutingCheck protection relay, measure DC offset, test mute transistors
Distorted AudioBias current, output stageAdjust bias current, check output transistors, test driver stage
No DisplayDisplay power, microcontrollerCheck -30V supply, test display driver IC, verify microprocessor operation
Tuner ProblemsAntenna, tuner ICVerify antenna connection, check tuner power supply, test tuner IC

Safety Precautions

Essential safety procedures for service technicians.

Always disconnect AC power before servicing. Discharge large capacitors. Use isolation transformer when testing live circuits. Follow ESD protection procedures. Verify correct reassembly before applying power.

CAUTION! Lethal voltages present. Only qualified personnel should perform service.

Service Notes

Factory service bulletins and common repair solutions.

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

Parts Ordering: www.marantz.com/parts

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