Sony MZ-R900 service manual Portable Minidisc Recorder, US Model, Canadian Model, AEP Model, Ver

SERVICE MANUAL	MZ-R900
	US Model
Ver 1.2 2001. 03	Canadian Model
	AEP Model
	UK Model
	E Model
	Australian Model
	Chinese Model
	Tourist Model
	Photo: Red type

US and foreign patents licensed from Dolby Laboratories Licensing Corporation.

Model Name Using Similar Mechanism	NEW
Mechanism Type	MT-MZR900-171
Optical Pick-up Name	LCX-4R

Audio playing system

MiniDisc digital audio system

Laser diode properties

Material: GaAlAs

Wavelength: λ = 790 nm

Emission duration: continuous

Laser output: less than 44.6 ∝ W

(This output is the value measured at a distance of 200 mm from the lens surface on the optical pick-up block with 7 mm aperture.)

Recording and playback time

When using MDW-80:

Maximum 160 min. in monaural Maximum 320 min. in stereo

Revolutions

350 rpm to 2,800 rpm (CLV)

Error correction

ACIRC (Advanced Cross Interleave Reed Solomon Code)

Sampling frequency

44.1 kHz

Sampling rate converter

Input: 32 kHz/44.1 kHz/48 kHz

Coding

ATRAC (Adaptive TRansform Acoustic

Coding)

ATRAC3 — LP2

ATRAC3 — LP4

Modulation system

EFM (Eight to Fourteen Modulation)

Number of channels

2 stereo channels

1 monaural channel

Frequency response

20 to 20,000 Hz ± 3 dB

SPECIFICATIONS

Wow and Flutter

Below measurable limit

Inputs

Microphone: stereo mini-jack, minimum input level 0.25 mV

Line in1): stereo mini-jack, minimum input level 49 mV

Optical (Digital) in1): optical (digital) mini-jack

Outputs

i/LINE OUT2): stereo mini-jack headphones/earphones: maximum output level 5 mW + 5 mW, load impedance 16 ohm LINE OUT: 194 mV, load impedance 10 kilohm

1)The LINE IN (OPT) jack is used to connect either a digital (optical) cable or a line (analog) cable.

2)The i/LINE OUT jack connects either headphones/earphones or a line cable.

Power requirements

Sony AC Power Adaptor connected at the DC IN 3V jack:

120 V AC, 60 Hz (US model)

230–240 V AC, 50/60 Hz (UK and Hong Kong model)

220–230 V AC, 50/60 Hz (European model) 120 V AC, 50 Hz (Canadian model)

240 V AC, 50 Hz (Australian model)

220 V AC, 50 Hz (Chinese model) 110/220 V AC, 60 Hz (Korean model) 100–240 V AC, 50/60 Hz (Other models)

Nickel metal hydride rechargeable battery NH- 14WM

LR6 (size AA) alkaline battery

Battery operation time

Battery life1)

When recording2)

(Unit: approx.hours)(EIAJ3))

Batteries	Stereo	LP2	LP4
NH-14WM	8	10.5	13
nickel metal
hydride
rechargeable
battery4)
LR6 (SG)	7	10	14
Sony alkaline
dry battery5)
NH-14WM	19	26	30
nickel metal
hydride
rechargeable
battery4)

+One LR6 (SG)5)

1)The battery life may be shorter due to operating conditions and the temperature of the location.

2)When you record, use a fully charged rechargeable battery. Recording time may differ according to the alkaline batteries.

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PORTABLE MINIDISC RECORDER

9-927-991-13	Sony Corporation
2001C0500-1	Audio Entertainment Group
C 2001.3	General Engineering Dept.