SERVICE MANUAL
U.S and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
System
MiniDisc digital audio system
Disc
MiniDisc
Laser
Semiconductor laser (λ = 780 nm)
Emission duration: continuous
MAX 44.6 µW
Laser output
1)
1) 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
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)/ATRAC 3
Modulation system
EFM (Eight-to-Fourteen
Modulation)
Number of channels
2 stereo channels
5 to 20,000 Hz ±0.3 dB
Frequency response
Signal-to-noise ratio
Over 100 dB during play
Wow and flutter
Below measurable limit
Inputs
ANALOG IN
Jack type: phono
Impedance: 47 kilohms
Rated input: 500 mVrms
Minimum input: 125 mVrms
MDS-JB940
Model Name Using Similar Mechanism
MD Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
DIGITAL OPTICAL IN1 Connector type: square optical
Impedance: 660 nm (optical wave
length)
DIGITAL OPTICAL IN2 Connector type: square optical
Impedance: 660 nm (optical wave
length)
DIGITAL COAXIAL IN
Jack type: phono
Impedance: 75 ohms
Rated input: 0.5 Vp-p, ±20 %
Outputs
PHONES
Jack type: stereo phone
Rated output: 28 mW
Load impedance: 32 ohms
ANALOG OUT
Jack type: phono
Rated output: 2 Vrms (at 50
kilohms)
Load impedance: over 10 kilohms
DIGITAL OPTICAL OUT Connector type: square optical
Rated output: –18 dBm
Load impedance: 660 nm (optical
wave length)
DIGITAL COAXIAL OUT Jack type: phono
Rated output: 0.5 Vp-p (at 75 ohms)
Load impedance: 75 ohms
US Model
Canadian Model
AEP Model
UK Model
NEW
MDM-7A
KMS-260B/J1N
General
Power requirements
Where purchased
Power requirements
U.S.A. and Canada
120 V AC, 60 Hz
Europe
230 V AC, 50/60 Hz
Power consumption
18 W
430 × 111 × 286 mm (17 × 4
Dimensions (approx.)
11
3
/
in.) (w/h/d) incl. projecting
8
parts and controls
Mass (approx.)
5.3 kg (11 lbs 11 oz)
Supplied accessories
This MD deck comes with the following items:
Audio connecting cords (2)
Optical cable (1)
Remote commander (remote) (1)
R6 (size-AA) batteries (2)
US and foreign patents licensed from Dolby Laboratories.
Design and specifications are subject to change without
notice.
MINIDISC DECK
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