MDS-JE640
SPECIFICATIONS
SERVICE MANUAL
MINIDISC DECK
Model Name Using Similar Mechanism
NEW
MD Mechanism Type
MDM-7A
Optical Pick-up Type
KMS-260B/J1N
Canadian Model
AEP Model
UK Model
E Model
US and foreign patents licensed form Dolby Laboratories
Licensing Corporation.
Inputs
Outputs
System
MiniDisc digital audio system
Disc
MiniDisc
Laser
Semiconductor laser (
λ
= 780 nm)
Emission duration: continuous
Laser output
MAX 44.6
µ
W
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
Frequency response
5 to 20,000 Hz
±
0.3 dB
Signal-to-noiseratio
Over 98 dB during play
Wow and flutter
Below measurable limit
ANALOG IN
Jack type: phono
Impedance: 47 k
Ω
Rated input: 500 mVrms
Minimum input: 125 mVrms
DIGITAL IN
Connector type: square optical
Impedance: 660 nm (optical wave
length)
DIGITAL OPTICAL IN
(AEP, UK, CIS models)
Connector type: square optical
Impedance: 660 nm (optical wave
length)
DIGITAL COAXIAL IN
(AEP, UK, CIS models)
Jack type: phono
Impedance: 75
Ω
Rated input: 0.5 Vp-p,
±
20 %
PHONES (MDS-JE640
only)
Jack type: stereo phone
Rated output: 28 mW
Load impedance: 32
Ω
ANALOG OUT
Jack type: phono
Rated output: 2 Vrms (at 50
k
Ω
)
Load impedance: over 10 k
Ω
— Continued on next page —
Photo: SILVER
Содержание MDS-JE640
Страница 42: ...MDS JE640 42 42 6 10 SCHEMATIC DIAGRAM MAIN SECTION 3 3 See page 47 for IC Block Diagrams ...
Страница 43: ...MDS JE640 43 43 6 11 PRINTED WIRING BOARD POWER SECTION ...
Страница 44: ...MDS JE640 44 44 6 12 PRINTED WIRING BOARD DISPLAY SECTION ...
Страница 45: ...MDS JE640 45 45 6 13 SCHEMATIC DIAGRAM DISPLAY SECTION See page 34 for Waveforms ...