Sony MZ-R55 Service Manual

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MICROFILM
MZ-R55
SERVICE MANUAL
PORTABLE MINIDISC RECORDER
SPECIFICATIONS
E Model
Tourist Model
Model Name Using Similar Mechanism NEW
MD Mechanism Type MT-MZR55-161
Optical Pick-up Type KMS-280A
US and foreign parts licensed 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
Microphone: stereo mini-jack, 0.22-0.78 mV
Line in: stereo mini-jack, 69-194 mV
Optical (Digital) in: optical (digital) mini-jack
Outputs
Headphones: 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
General
Power requirements
Sony AC Power Adaptor (supplied)
connected at the DC IN 3V jack:
220-230 V AC, 50/60 Hz (Hong Kong model)
100-240 V AC, 50/60 Hz (Tourist model)
Nickel metal hydride rechargeable battery NH-14WM (supplied)
Two LR6 (size AA) alkaline batteries (not supplied)
– Continued on next page –
Ver 1.0 1998. 09

Sony MZ-R55 Specifications

General

Recording Modes	SP, LP2, LP4
Sampling Frequency	44.1 kHz
Headphone Output	Yes
Type	MiniDisc Player
Frequency Response	20 Hz - 20 kHz (±3 dB)
Battery Type	2 x AA
Digital Input	Optical

Summary

SERVICE MANUAL

SPECIFICATIONS

Detailed technical specifications of the portable MiniDisc recorder, including frequency response, inputs, and outputs.

SECTION 2 SELF-DIAGNOSTIC

2-1. GENERAL

2-2. TEST MODE SETTING

Methods for entering the test mode for self-diagnosis and adjustments.

2-3. OPERATION IN TEST MODE SETTING

How the LCD displays change when the device is in test mode.

2-4. RELEASING THE TEST MODE

2-5. SELF-DIAGNOSTIC MODE

Steps to enter and navigate the self-diagnostic mode to view error history.

2-6. CLEARING THE ERROR INDICATION CODE AND TOTAL RECORDING TIME

2-6. CLEARING THE ERROR INDICATION CODE AND TOTAL RECORDING TIME

Procedures for resetting error codes and total recording time after repairs.

SECTION 3 DISASSEMBLY

3-1. BOTTOM PANEL ASSY

3-2. CONNECTOR

3-6. MAIN BOARD

3-6. MAIN BOARD

Procedure for removing the main board from the chassis.

SECTION 4 TEST MODE

4-1. GENERAL

Overview of the overall and servo modes for automatic adjustments.

4-2. TEST MODE SETTING

Instructions on how to enter the test mode.

4-3. TEST MODE STRUCTURE

4-4. MANUAL MODE

Detailed guide on performing manual adjustments within different modes (Servo, Audio, Mechanism, Power).

Audio Mode

How to Transfer in the Audio Mode

Mechanism Mode

How to Transfer the Mode in the Mechanism Mode

How to Adjust in the Audio Mode

How to Adjust in the Audio Mode

Detailed steps for adjusting audio parameters within the audio mode.

How to Check in the Audio Mode

How to Check in the Audio Mode

Power Mode

How to Check in the Power Mode

OVERALL ADJUSTMENT MODE (ASSY MODE)

How to Adjust in Assy Mode

Procedure for performing overall automatic adjustments for CD and MO disks.

CD Automatic Adjustment

Details on the automatic adjustment process for CD playback and read functions.

MO Automatic Adjustment

MO Automatic Adjustment

Table listing MO automatic adjustment modes and their descriptions.

SECTION 5 ELECTRICAL ADJUSTMENTS

PRECAUTIONS FOR ADJUSTMENT

General precautions and guidelines before performing electrical adjustments.

LASER POWER CHECK

Procedure for measuring and adjusting laser power output for CD and MO modes.

MO TRAVERSE ADJUSTMENT

Steps for adjusting the MO traverse mechanism for optimal performance.

LOW REFLECTION CD TRAVERSE ADJUSTMENT

CD TRAVERSE ADJUSTMENT

CD RF LEVEL CHECK

2.65V ADJUSTMENT

Adjustment Method

Steps to adjust the 2.65V power supply using RV901.

SECTION 6 DIAGRAMS

6-1. IC PIN DESCRIPTIONS

Pin descriptions for IC503 CXD2652AR (Digital Servo, ATRAC).

IC PIN DESCRIPTIONS

Pin descriptions for IC503 CXD2652AR (Digital Servo, ATRAC).

IC802 CXP740010 (SYSTEM CONTROL)

Pin No. Pin name I/O Pin Description

Pin descriptions for IC802 CXP740010 (System Control).

BLOCK DIAGRAM – SERVO SECTION –

BLOCK DIAGRAM – AUDIO SECTION –

BLOCK DIAGRAM – SYSTEM CONTROL SECTION –

SCHEMATIC DIAGRAM — MAIN SECTION (1/3) —

SCHEMATIC DIAGRAM — MAIN SECTION (2/3) —

Waveforms

SCHEMATIC DIAGRAM — MAIN SECTION (3/3) —

IC Block Diagrams

IC301 AK4517-VQ-L

IC303 AN7535SA-E1

IC601 XC6383E401MR

IC302 TLV23621PW

IC501 CXA2523AR

IC803 S-8110ANP-DSB-T2

IC901 NJU7015M

IC505 MPC17A58DTBEL

IC509 MN41X17400CTT

IC602 MPC18A20VMEL

IC701 BA6966FV

IC806 XC6383B331MR

IC804 PST9325UL

IC805 RS5C348A

IC902, 903 MB3800-M03

SECTION 7 EXPLODED VIEWS

PANEL SECTION

Exploded view of the panel section, showing component parts and their references.

CHASSIS SECTION

MECHANISM DECK SECTION

(MT-MZR55-161)

Exploded view of the mechanism deck section, detailing its components.

SECTION 8 ELECTRICAL PARTS LIST

CAPACITOR

CAPACITOR (continued)

CONNECTOR

DIODE

IC

COIL

TRANSISTOR

RESISTOR

SAFETY-RELATED COMPONENT WARNING!!

Flexible Circuit Board Repairing

Precautions for Laser Diode Emission Check

Safety precautions when checking the laser diode emission.

Precautions for Using Optical Pick-up (KMS-280A)

Handling precautions for the optical pick-up to prevent static damage.