SERVICE MANUAL
MINIDISC DECK
MICROFILM
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SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
Model Name Using Similar Mechanism
MDS-JA20ES
MD Mechanism Type
MDM-6A
Base Unit Type
MBU-5C
Optical Pick-up Type
KMS-260B/J1N
MDS-JA555ES
U.S. and foreign patents licensed from Dolby Laboratories
Licensing Corporation.
Photo : GOLD
System
MiniDisc digital audio system
Disc
MiniDisc
Laser
Semiconductor laser (
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 objective lens surface on the
Optical Pick-up Block with 7 mm aperture.
Laser diode properties
Material: GaAlAs
Revolutions (CLV)
400 rpm to 900 rpm
Error correction
ACIRC (Advanced Cross Interleave
Reed Solomon Code)
Sampling frequency 44.1 kHz
Coding
ATRAC (Adaptive TRansform Acoustic Coding)
Modulation system
EFM (Eight-to-Fourteen Modulation)
Number of channels 2 stereo channels
Frequency response 5 Hz to 20,000 Hz ± 0.3 dB
Signal-to-noise ratio Over 105 dB during playback
Wow and flutter
Below measurable limit
Inputs
Jack
Input
Rated
Minimum
type
impedance
input
input
LINE
Phono
(ANALOG)
jacks
47 k
Ω
500 mVrms
125 mVrms
IN
DIGITAL
Square
Optical wave
IN
optical
length
OPT1
connector
660 nm
jack
DIGITAL
Square
Optical wave
IN
optical
length
OPT2
connector
660 nm
jack
DIGITAL
Phono
0.5 Vp-p
IN
jack
75
Ω
±20%
COAXIAL