Sony MZ-R55 Service Manual page 87

SERVICE MANUAL
Ver 1.2 1999. 02
US and foreign patents licensed from Dolby Laboratories
Licensing Corporation.
System
Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: λ = 780 nm
Emission duration: continuous
Laser output: less than 44.6 µW
(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 74 minutes (MDW-74, stereo
recording)
Maximum 148 minutes (MDW-74, monaural
recording)
Revolutions
400 rpm to 900 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
MICROFILM
MZ-R55
Model Name Using Similar Mechanism
MD Mechanism Type
Optical Pick-up Type
SPECIFICATIONS
Frequency response
20 to 20,000 Hz ± 3 dB
Wow and Flutter
Below measurable limit
Inputs
Microphone: stereo mini-jack, 0.22-0.78 mV
Line in: stereo mini-jack, 69-194 mV
Optical (Digital) in: optical (digital) mini-jack
Outputs
Headphones: stereo mini-jack, maximum
output level 5 mW+ 5 mW, load impedance
16 ohm
Line out: stereo mini-jack, 194 mV, load
impedance 10 kilohm
General
Power requirements
Sony AC Power Adaptor (supplied)
connected at the DC IN 3V jack:
120 V AC, 60 Hz (US model)
220-240 V AC, 50/60 Hz (Hong Kong model)
100-240 V AC, 50/60 Hz (Tourist model)
Nickel metal hydride rechargeable battery NH-14WM (supplied)
Two LR6 (size AA) alkaline batteries (not supplied)
PORTABLE MINIDISC RECORDER
– 1 –
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
NEW
MT-MZR55-161
KMS-280A
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