MZ-B50
SERVICE MANUAL
PORTABLE MINIDISC RECORDER
US Model
Canadian Model
AEP Model
Tourist Model
SPECIFICATIONS
Model Name Using Similar Mechanism
NEW
Mechanism Type
MT-MZB50-165
Optical Pick-up Name
LCX-2R
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
= 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
Speaker
28 mm (1
1/8
in.) dia.
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
: stereo mini-jack
Headphones/earphones: 5 mW + 5 mW
Speaker: 300 mW
– Continued on next page –
Ver 1.1 2001.03
With SUPPLEMENT-1
(9-927-952-83)
9-927-952-12
2001C0200-1
© 2001.3
Sony Corporation
Audio Entertainment Group
General Engineering Dept.