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
µ
W
(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 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
±
3 dB
Wow and Flutter
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: maximum output level 5 mV +
5 mV, load impedance 16 ohm
LINE OUT: 194 mV, load impedance 10
kilohm
* The
i
/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
Approx. 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
operating conditions and the temperature of
the location.
2)
When you record, use a fully charged
rechargeable 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)
