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 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: 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
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