Sony MDS-JB920 service manual Specifications, MDS-JE520, MDM-5A

MDS-JB920

SERVICE MANUAL

US Model

Canadian Model

AEP Model

UK Model

U.S. and foreign patents licensed form Dolby Laboratories Licensing Corporation.

Model Name Using Similar Mechanism	MDS-JE520
MD Mechanism Type	MDM-5A
Optical Pick-up Type	KMS-260A/J1N

SPECIFICATIONS

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 (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

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)

MINI DISC DECK

MICROFILM