Sony MZ-R91 service manual US Model Canadian Model Australian Model, Chinese Model, Ver, MZ-R90

SERVICE MANUAL

Ver 1.4 2001.01

With SUPPLEMENT-1(9-927-187-83)

US and foreign patents licensed from Dolby Laboratories Licensing Corporation.

MZ-R90/R91

US Model

Canadian Model

Australian Model

Chinese Model

MZ-R90

AEP Model

UK Model

E Model

Tourist Model

		MZ-R90/R91
Photo: MZ-R91 (Blue type)
	Model Name Using Similar Mechanism	NEW
	Mechanism Type	MT-MZR90-165
	Optical Pick-up Name	LCX-2R

System

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

Maximum 80 minutes (MDW-80, stereo recording)

Maximum 160 minutes (MDW-80, monaural recording)

Maximum 74 minutes (MDW-74, stereo recording)

Maximum 148 minutes (MDW-74, monaural recording)

Revolutions

400 rpm to 1,800 rpm (CLV)

Error correction

Advanced Cross Interleave Reed Solomon Code (ACIRC)

Sampling frequency

44.1 kHz

Sampling rate converter

Input: 32 kHz/44.1 kHz/48 kHz

Coding

Adaptive TRansform Acoustic Coding (ATRAC)

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

Wow and Flutter

SPECIFICATIONS

LINE OUT: 194 mV, load impedance 10 kilohm

*The i/LINE OUT jack connects either headphones or a line cable.

General

Power requirements

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

220–230 V AC, 50/60 Hz (European model) 120 V AC, 50 Hz (Canadian model) 100–240 V AC, 50/60 Hz (Other models)

Nickel metal hydride rechargeable battery NH- 14WM (supplied)

LR6 (size AA) alkaline battery (not supplied)

Battery operation time

Battery life1)

Batteries	Recording	Playback
	2)
NH-14WM	Approx.	Approx.
nickel metal	6.5 hours	12 hours
hydride
rechargeable
battery
LR6 (SG)	Approx.	Approx.
(size AA)	4 hours	16.5
Sony alkaline		hours
dry battery
NH-14WM	Approx.	Approx.
nickel metal	14.5 hours	29 hour
hydride
rechargeable
battery

+One LR6 (SG) (size AA)

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.

Dimensions

MZ-R90

Approx. 78.9 ⋅ 17.3 ⋅ 72.0 mm (w/h/d) (31/8 ⋅ 11/16 ⋅ 27/8 in.)

MZ-R91

Approx. 78.9 ⋅ 18.0 ⋅ 72.0 mm (w/h/d) (31/8 ⋅ 23/32 ⋅ 27/8 in.)

Mass

MZ-R90

Approx. 105 g (3.7 oz) the recorder only Approx. 148 g (5.2 oz) incl. a recordable MD, and NH-14WM nickel metal hydride rechargeable battery

MZ-R91

Approx. 110 g (3.8 oz) the recorder only Approx. 153 g (5.4 oz) incl. a recordable MD, and NH-14WM nickel metal hydride rechargeable battery

Supplied accessories

AC power adaptor (1)

Headphones with a remote control (1) (RM-MZ2S) NH-14WM nickel metal hydride rechargeable battery (1)

Dry battery case (1)

Rechargeable battery carrying case (1) Carrying pouch (1)

AC plug adaptor (1)

Design and specifications are subject to change without notice.

Below measurable limit

Inputs

Microphone: stereo mini-jack, 0.35–1.38 mV

Line in: stereo mini-jack, 69–194 mV

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

Outputs

i/LINE OUT*: stereo mini-jack Headphones: maximum output level 5 mV + 5 mV, load impedance 16 ohm

PORTABLE MINIDISC RECORDER