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MICROFILM
SERVICE MANUAL
MINIDISC DECK
US Model
Canadian Model
AEP Model
UK Model
SPECIFICATIONS
MDS-JA20ES
U.S. and foreign patents licensed form Dolby Laboratories
Licensing Corporation.
Model Name Using Similar Mechanism
NEW
MD Mechanism Type
MDM-6A
Base Unit Name
MBU-5C
Optical Pick-up Name
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 (ACIRC)
Sampling frequency
44.1 kHz
Coding
Adaptive Transform Acoustic Coding
(ATRAC)
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-noise ratio
Over 102 dB during playback
Wow and flutter
Below measurable limit
Inputs
Jack
Input
Rated
Minimum
type
impedance
input
input
LINE (ANALOG) Phono
47 kilohms
500 mVrms 125 mVrms
IN
jacks
DIGITAL IN
Square
Optical wave
OPT 1
optical
length:
—
—
connector
660 nm
jack
DIGITAL IN
Square
Optical wave
OPT 2
optical
length:
—
—
connector
660 nm
jack
DIGITAL IN
Phono
75 ohms
0.5 Vp-p,
—
COAXIAL
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
DIGITAL OUT
Square
–18 dBm
Optical wave
OPTICAL
optical
length:
connector
660 nm
jack
DIGITAL OUT
Phono
0.5 Vp-p
75 ohms
COAXIAL
jack
(at 75 ohms)
– Coutinued on next page –
Photo: GOLD Type
Содержание MDS-JA20ES - Minidisc Deck
Страница 13: ... 13 ...
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Страница 43: ...6 7 PRINTED WIRING BOARDS BD SWITCH Section See page 39 for Circuit Boards Location 47 Page 67 ...
Страница 44: ... 48 6 8 SCHEMATIC DIAGRAM BD SWITCH Section Page 69 ...
Страница 45: ...MDS JA20ES 49 50 6 9 PRINTED WIRING BOARD AUDIO Board Component Side See page 39 for Circuit Boards Location ...
Страница 49: ... 57 6 13 PRINTED WIRING BOARD DIGITAL Section See page 39 for Circuit Boards Location ...
Страница 54: ...MDS JA20ES 65 66 6 17 PRINTED WIRING BOARD POWER Board Component Side See page 39 for Circuit Boards Location ...