Sony MZ-R91 User Manual

SERVICE MANUAL
PORTABLE MINIDISC RECORDER
US Model
Canadian Model
Australian Model
Chinese Model
MZ-R90
AEP Model
UK Model
E Model
Tourist Model
MZ-R90/R91
SPECIFICATIONS
MZ-R90/R91
US and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
Photo: MZ-R91 (Blue type)
System
Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: λ = 790 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-upblockwith7mmaperture.)
Recording and playback time
Maximum 80 minutes (MDW-80, stereo
recording)
Maximum 160 minutes (MDW-80, monaural
recording)
Maximum 74 minutes (MDW-74, stereo
recording)
Maximum 148 minutes (MDW-74, monaural
recording)
Revolutions
400 rpm to 1,800 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 ± 3dB
Wo w and Fl ut ter
Below measurable limit
Inputs
Microphone: stereo mini-jack, 0.35–1.38 mV
Line in: stereo mini-jack, 69–194 mV
Optical (Digital) in: optical (digital) mini-jack
Outputs
i/LINE OUT*: stereo mini-jack
Headphones: max
imum output level 5 mV +
5
mV, load impedance 16 ohm
LINE OUT: 194 mV, load impedance 10
kilohm
*Thei/LINE OUT jack connects either
headphones or a line cable.
General
Power requirements
Sony AC Power Adaptor (supplied) connected
at the DC IN 3 V jack:
220–230 V AC, 50/60 Hz (European model)
120 V AC, 50 Hz (Canadian model)
100–240 V AC, 50/60 Hz (Other models)
Nickel metal hydride rechargeable battery NH-
14WM (supplied)
LR6 (size AA) alkaline battery (not supplied)
Battery operation time
Dimensions
MZ-R90
Approx. 78.9 × 17.3 × 72.0 mm (w/h/d)
(3
1
/ 8 ×
11
/ 16 × 2
7
/ 8 in.)
MZ-R91
Approx. 78.9 × 18.0 × 72.0 mm (w/h/d)
(3
1
/ 8 ×
23
/ 32 × 2
7
/ 8 in.)
Mass
MZ-R90
Approx. 105 g (3.7 oz) the recorder only
Ap
prox. 148 g (5.2 oz) incl. a recordable MD,
and NH-14WM nickel metal hydride
rechargeable battery
MZ-R91
Approx. 110 g (3.8 oz) the recorder only
Approx. 153
g (5.4 oz) incl. a recordable MD,
and
NH-14WM nickel metal hydride
rechargeable battery
Supplied accessories
AC power adaptor (1)
Headphones with a remote control (1) (RM-MZ2S)
NH-14WM nickel metal
hydride rechargeable
battery (1)
Dry battery case (1)
Rechargeable battery carrying case (1)
Carrying pouch (1)
A
Design and specifications are subject to
change without notice.
C plug adaptor (1)
Battery life
1)
Batteries Recording
2)
Playback
NH-14WM
nickel metal
hydride
rechargeable
battery
Approx.
6.5 hours
Approx.
12 hours
LR6 (SG)
(size AA)
Sony alkaline
dry battery
Approx.
4 hours
Approx.
16.5
hours
NH-14WM
nickel metal
hydride
rechargeable
battery
+ One LR6
(SG)
(size
AA)
Approx.
14.5 hours
Approx.
29 hour
1)
The battery life may be shorter due to
ope
rating conditions and the temperature of
the location.
2)
When you record, use
a fully charged
re
chargeable battery.
Model Name Using Similar Mechanism NEW
Mechanism Type MT-MZR90-165
Optical Pick-up Name LCX-2R
Ver 1.4 2001.01
With SUPPLEMENT-1
(9-927-187-83)

Sony MZ-R91 Specifications

General

Brand	Sony
Model	MZ-R91
Category	CD Player
Language	English

Summary

Specifications

System and Performance Specs

Technical details on system, laser, recording, playback, response, and inputs/outputs.

Power, Battery, and Physical Specs

Information on power requirements, battery life, dimensions, and mass.

Supplied Accessories

List of included accessories.

Servicing Notes

Optical Pick-Up & Laser Handling

Guidelines for safe handling of the optical pick-up and laser diode.

Repairing & Replacement Precautions

Notes on flexible circuit board repair and chip component replacement.

General

Control Identification

Description of all controls for the recorder, display window, and remote headphones.

Disassembly

Panel Assemblies

Steps for disassembling bottom and upper panel assemblies.

LCD Module and Main Board

Procedures for removing LCD module, main board, and associated assemblies.

Chassis, Mechanism, and Motors

Disassembly of chassis, mechanism deck, service assemblies, holder, motor boards, and DC motors.

Test Mode

Test Mode Setup & Operation

Methods for entering, operating, and exiting test mode.

Mode Configuration & Manual Mode

Overview of test mode configurations and detailed Manual Mode operation.

Adjustment & Diagnostic Modes

Procedures for Overall Adjustment, Sound Skip Check, and Self-Diagnosis.

Key Check Mode

Procedure for verifying the functionality of all unit and remote controls.

Electrical Adjustments

Precautions & Sequence

Safety guidelines, tools, and the overall sequence for electrical adjustments.

Reset, Power, and Temperature Adjustments

NV reset, power supply adjustment, and temperature correction procedures.

CD/MO and Laser Power Adjustments

Automatic CD/MO adjustments and laser power checks.

Diagrams

Block Diagrams

System block diagrams illustrating signal paths and functional blocks.

Wiring and Schematic Diagrams

Printed wiring board layouts and detailed circuit schematics.

IC Pin Function Descriptions

Detailed pin assignments and functions for key integrated circuits.

Exploded Views

Panel and Chassis Views

Exploded views of panel assemblies and the main chassis.

Mechanism Deck Details

Detailed exploded view of the MD mechanism deck and its components.

Electrical Parts List

Component Listing

Comprehensive list of all electrical components, part numbers, and descriptions.

Supplement-1

Korean Model Information

Details regarding the addition of the Korean model variant.

Document Corrections

Information on corrections to exploded views and parts lists.