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MICROFILM
MZ-R37
SERVICE MANUAL
PORTABLE MINIDISC RECORDER
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
Model Name Using Similar Mechanism
MZ-R55
MiniDisc Mechanism Type
MT-MZR37-161
Optical Pick-up Type
KMS-280A
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
µ
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 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
Frequency response
20 to 20,000 Hz ± 3 dB
Wow and Flutter
Below measurable limit
Inputs
MIC (PLUG IN POWER): stereo mini-jack,
0.35–1.38 mV
(OPTICAL) LINE IN: stereo mini-jack with
optical (digital) in
• Line in: 69–194 mV
• Optical (digital) in: wave length 660 nm
Outputs
PHONES/REMOTE: 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 or greater
General
Power requirements
Sony AC Power Adaptor (supplied)
connected at the DC IN 4.5 V jack:
120 V AC, 60 Hz (US, Canadian model)
220–230 V AC, 50/60 Hz (AEP model)
230–240 V AC, 50 Hz (UK model)
240 V AC, 50 Hz (Australian and New Zealand model)
Two nickel-cadmium rechargeable batteries
NC-AA (supplied)
Two LR6 (size AA) alkaline batteries (not supplied)
– Continued on next page –
Ver 1.3 1999. 11
With SUPPLEMENT-1
(9-926-952-81)
With SUPPLEMENT-2
(9-926-952-82)
