MICROFILM
SERVICE MANUAL
MINI DISC DECK
US Model
Canadian Model
AEP Model
UK Model
SPECIFICATIONS
MDS-JB920
Model Name Using Similar Mechanism
MDS-JE520
MD Mechanism Type
MDM-5A
Optical Pick-up Type
KMS-260A/J1N
System
MiniDisc digital audio system
Disc
MiniDisc
Laser
Semiconductor laser (
λ
=780nm)
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 objective lens
surface on the Optical Pick-up Block with 7
mm aperture.
Laser diode properties
Material: GaAIAs
Revolutions (CLV)
400 rpm to 900 rpm
Error correction
Advanced Cross Interleave Reed
Solomon Code (A CIRC)
Sampling frequency
44.1 kHz
Coding
Adaptive Transform Acoustic Coding
(ATRAC)
Modulation system
EFM (English-to-Fourteen Modulation)
Number fo channels
2 setero channels
Frequency response
5 to 20,000 Hz ±0.3 dB
Signal-to-noise retio
Over 100 dB during playback
Wow and flutter
Below measureble limit
U.S. and foreign patents licensed form Dolby Laboratories
Licensing Corporation.
Inputs
jack
input
Rated
Minimum
type
impedance
input
input
LINE (ANALOG) phono
47 kilohms
500 mVrms 125 mVrms
IN
jacks
DIGITAL
Square
Optical wave
OPTICAL IN1
optical
length:
—
—
connector
660 nm
jack
DIGITAL
Square
Optical wave
OPTICAL IN2
optical
length:
—
—
connector
660 nm
jack
DIGITAL
Phono
75 ohms
0.5 Vp-p
—
COAXIAL IN
jack
±20%
Outputs
jack type
Rated output
Load impedance
PHONES
Stereo
28 mW
32 ohms
phone jack
LINE (ANALOG) Phono
2 Vrms
Over
OUT
jacks
(at 50 kilohms)
10 kilohms
DIGIRAL
Square
–18 dBm
Optical wave
OPTICAL OUT
optical
length:
connector
660 nm
jack
DIGITAL
Phono
0.5 Vp-p
75 ohms
COAXIAL OUT
jack
(at 75 ohms)
Содержание MDS-JB920
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