Sony MZ-R37 Service Manual

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MICROFILM
MZ-R37
SERVICE MANUAL
PORTABLE MINIDISC RECORDER
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
Model Name Using Similar Mechanism MZ-R55
MiniDisc Mechanism Type MT-MZR37-161
Optical Pick-up Type KMS-280A
US and foreign patents licensed from Dolby Laboratories
Licensing Corporation.
System
Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: λ = 780 nm
Emission duration: continuous
Laser output: less than 44.6 µW
(This output is the value measured at a
distance of 200 mm from the lens surface on
the optical pick-up block with 7 mm
aperture.)
Recording and playback time
Maximum 74 minutes (MDW-74, stereo
recording)
Maximum 148 minutes (MDW-74, monaural
recording)
Revolutions
400 rpm to 900 rpm (CLV)
Error correction
Advanced Cross Interleave Reed Solomon
Code (ACIRC)
Sampling frequency
44.1 kHz
Sampling rate converter
Input: 32 kHz / 44.1 kHz / 48 kHz
Coding
Adaptive TRansform Acoustic Coding (ATRAC)
Modulation system
EFM (Eight to Fourteen Modulation)
Number of channels
2 stereo channels
1 monaural channel
Frequency response
20 to 20,000 Hz ± 3 dB
Wow and Flutter
Below measurable limit
Inputs
MIC (PLUG IN POWER): stereo mini-jack,
0.35–1.38 mV
(OPTICAL) LINE IN: stereo mini-jack with
optical (digital) in
• Line in: 69–194 mV
• Optical (digital) in: wave length 660 nm
Outputs
PHONES/REMOTE: stereo mini-jack,
maximum output level 5 mW + 5 mW, load
impedance 16 ohm
LINE OUT: stereo mini-jack, 194 mV, load
impedance 10 kilohm or greater
General
Power requirements
Sony AC Power Adaptor (supplied)
connected at the DC IN 4.5 V jack:
120 V AC, 60 Hz (US, Canadian model)
220–230 V AC, 50/60 Hz (AEP model)
230–240 V AC, 50 Hz (UK model)
240 V AC, 50 Hz (Australian and New Zealand model)
Two nickel-cadmium rechargeable batteries
NC-AA (supplied)
Two LR6 (size AA) alkaline batteries (not supplied)
– Continued on next page –
Ver 1.3 1999. 11
With SUPPLEMENT-1
(9-926-952-81)
With SUPPLEMENT-2
(9-926-952-82)

Sony MZ-R37 Specifications

General

Type	MiniDisc Recorder
Sampling Frequency	44.1 kHz
Category	Portable
Recording Mode	SP
Frequency Response	20Hz - 20kHz
Digital Input	Optical
Formats	MiniDisc
Output	Headphones
Power Supply	3V DC (battery) or AC adapter

Summary

Service Manual MZ-R37 Overview

Specifications

Detailed technical specifications covering audio response, inputs, outputs, and general features.

Safety and Precautions

Laser Diode Emission and Optical Pick-up Precautions

Warnings regarding laser safety and handling of the optical pick-up to prevent damage.

Repair and Component Handling Notes

Guidelines for handling flexible circuit boards and chip components during repair.

Critical Component Safety Warning

Highlights critical components identified by marks that require specific safety replacement procedures.

General Information and Controls

Recorder Controls Overview

Detailed explanation of the recorder's buttons, switches, and indicators.

Headphones with Remote Control

Description of the headphones and remote control features and operation.

Self-Diagnostic System

Test Mode Setting and Operation

Explains how to enter, operate, and exit the device's test mode for diagnostics.

Self-Diagnostic Mode Interpretation

Describes how to initiate and interpret the self-diagnostic results and error codes.

Clearing Diagnostic Data

Procedure for clearing error codes and total recording time data after repairs.

Disassembly Procedures

Panel and Cover Removal

Step-by-step guide for removing the bottom and front panels of the unit.

Component Module Removal

Instructions for disassembling and removing the LCD module and connectors.

Main Board and Cabinet Removal

Steps for removing the main circuit board and the main cabinet assembly.

Optical Pick-up and Holder Removal

Procedures for disassembling the optical pick-up block and holder assemblies.

Test Mode Operations and Adjustments

Test Mode Structure and Overview

General explanation of the test mode, its structure, and capabilities for adjustment.

Manual Mode Adjustments (Servo, Audio, Mechanism, Power)

Detailed procedures for performing servo, audio, mechanism, and power adjustments in manual mode.

Overall Adjustment Mode (Assy Mode)

Instructions for the automatic overall adjustment mode for CD and MO disks.

Electrical Adjustment Procedures

Adjustment Precautions and Tools

Important safety and procedural notes, and required tools for electrical adjustments.

MO Traverse and Laser Power Adjustments

Step-by-step guides for adjusting the MO disk traverse mechanism and laser power.

CD Playback Adjustments (Traverse, RF Level)

Procedures for adjusting CD traverse mechanism and RF signal level for optimal playback.

Circuit Diagrams and Component Information

IC Pin Descriptions

Detailed pin assignments and functions for various integrated circuits used in the device.

Block Diagrams (Servo, Audio, System Control)

Visual representations of the servo, audio, and system control circuitry's functional blocks.

Printed Wiring Board Layout

Diagram showing component placement on the main printed circuit board.

Schematic Diagrams (Main Section 1/3, 2/3, 3/3)

Detailed schematic diagrams illustrating the electronic circuit connections across three parts.

Exploded Views and Parts Identification

Panel Section Exploded View

Exploded view of the unit's panel section with part number references.

Cabinet and Mechanism Deck Exploded Views

Exploded views of the cabinet and mechanism deck, detailing components and assembly.

Electrical Parts List

Main Board Components List

Comprehensive list of electrical components for the main board with part numbers.

Connectors, Diodes, Transistors, Resistors

Lists of connectors, diodes, transistors, and resistors with their part numbers.

Switches, Filters, and Vibrators List

List of switches, filters, and vibrator components with their respective part numbers.

Manual Corrections and Updates

Exploded Views and Parts List Corrections

Specific corrections to exploded views and electrical parts list, detailing part number discrepancies.