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 kΩ 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
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