Marantz PMD560 Service Manual

The Marantz PMD560 is a professional portable digital recorder featuring high-quality audio recording capabilities, built-in stereo microphones, XLR inputs with phantom power, USB connectivity, SD card storage, and professional audio monitoring features. This service manual provides comprehensive technical information for service technicians, including schematics, disassembly instructions, troubleshooting guides, and replacement part information.

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

Technical Specifications

Complete technical specifications and performance characteristics of the Marantz PMD560 professional recorder.

Parameter	Specification
Recording Format	Linear PCM, MP3
Sample Rates	44.1kHz, 48kHz, 96kHz
Bit Depth	16-bit, 24-bit
Inputs	2x XLR/TRS combo, built-in stereo mics
Outputs	Headphone, Line Out, USB
Phantom Power	+48V
Storage	SD/SDHC card up to 32GB
Power Supply	4x AA batteries, DC input
Frequency Response	20Hz - 20kHz ±1dB
Signal-to-Noise	>90dB

Block Diagrams

System block diagrams showing signal flow and functional relationships between major components.

Main System Block Diagram: Shows overall signal path from inputs to outputs.
Audio Processing Block Diagram: Details ADC/DAC and DSP signal processing.
Power Supply Block Diagram: Illustrates power distribution and regulation.
Control System Block Diagram: Shows microcontroller and user interface connections.

NOTE: Refer to schematics for detailed component-level information.

Circuit Descriptions

Detailed descriptions of major circuit sections and their operation.

Analog Input Stage: Balanced XLR inputs with phantom power circuitry.
Preamplifier Circuit: Low-noise mic preamps with gain control.
ADC Section: High-resolution analog-to-digital conversion.
Digital Processing: DSP for filtering and effects processing.
DAC Section: Digital-to-analog conversion for monitoring.
Power Management: Battery and external power control.
Clock System: Master clock and sample rate generation.

Disassembly Procedures

Step-by-step instructions for safe disassembly and reassembly.

Remove battery cover and batteries.
Remove 8 screws from bottom case.
Carefully separate top and bottom cases.
Disconnect internal ribbon cables.
Remove main PCB assembly.
Separate front panel assembly.

WARNING! Always disconnect power before disassembly. Handle ribbon cables with care to avoid damage.

PCB Layouts

Complete printed circuit board layouts for all major assemblies.

PCB	Description	Reference
Main Board	Primary audio processing and control	PCB-560-MAIN
Front Panel	User interface and controls	PCB-560-FP
Input Board	XLR inputs and phantom power	PCB-560-IN
Power Board	Power regulation and battery management	PCB-560-PWR

Schematics

Complete electrical schematics for all circuit sections.

Main System Schematic: Complete system overview.
Analog Input Schematic: XLR and microphone input circuits.
Power Supply Schematic: Battery and DC input circuits.
Digital Processing Schematic: DSP and memory circuits.
Control System Schematic: Microcontroller and interface.
Audio Output Schematic: Headphone and line output circuits.

NOTE: All schematics include component values and reference designators.

Test Points & Measurements

Critical test points and expected measurement values.

Test Point	Location	Expected Value
TP1 (+5V)	Main board near U101	+5.0V ±0.1V
TP2 (+3.3V)	Main board near U102	+3.3V ±0.1V
TP3 (Clock)	X101 pin 2	24.576MHz ±10ppm
TP4 (Ref Voltage)	U201 pin 8	+2.5V ±0.05V
TP5 (Mic Bias)	J101 pin 1	+3.3V when enabled

Alignment Procedures

Factory alignment and calibration procedures.

Input Gain Calibration: Adjust trimmers for proper input levels.
Output Level Calibration: Set output levels to specification.
Clock Alignment: Verify and adjust master clock frequency.
Battery Calibration: Calibrate battery level indication.
Microphone Alignment: Balance built-in microphone response.

CAUTION! Use calibrated test equipment for all alignment procedures.

Parts List

Complete list of replacement parts and components.

Main ICs: U101 - Main Processor, U102 - Audio DSP, U103 - Flash Memory
Analog Components: U201 - ADC, U202 - DAC, U203 - Op Amps
Power Components: U301 - DC-DC Converter, U302 - Battery Manager
Connectors: J101 - XLR Inputs, J102 - Headphone, J103 - USB
Mechanical Parts: Case assemblies, buttons, knobs

Troubleshooting Guide

Common problems and solutions for the PMD560.

Symptom	Possible Cause	Corrective Action
No power	Battery/DC input	Check batteries; verify DC input voltage; test power switch
No audio recording	Input selection/mics	Verify input source; check microphone connections; test input circuits
Distorted audio	Input levels/ADC	Reduce input gain; check ADC reference voltage; test op amps
SD card errors	Card format/connector	Reformat card; clean card contacts; check card detect switch
USB not recognized	Cable/driver	Try different cable; check USB connector; test USB interface IC

Service Notes

Important service information and special procedures.

Factory Reset: Hold STOP + PLAY during power-on to reset to factory defaults.

Firmware Update: Use official Marantz firmware updater via USB connection.

Calibration: Requires specialized test equipment for proper alignment.

Warranty: Service by unauthorized personnel voids warranty.

Service Support: Contact Marantz professional audio support for technical assistance and genuine replacement parts.