Service manual

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MD-MT180
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO
THE OPERATION MANUAL.
Specifications for this model are subject to change without prior
notice
SPECIFICATIONS
Power source:
DC 1.2 V: Rechargeable Nickel-Metal Hydride battery (AD-N55BT) x 1
DC 5 V: AC adaptor (AC 120 V, 60 Hz)
DC 1.5 V: Battery case (Commercially available, "AA" size (LR6), alkaline battery x 1)
DC 4.5 V: Optional car adaptor, AD-CA20X (for cars with a 12 - 24 V DC negative ground
electrical system)
Power consumption:
7 W (AC adaptor)
Output power:
RMS: 20 mW (10 mW + 10 mW)
(0.2 % T.H.D.)
Charging time:
Approx. 3.5 hours (90 %)
Approx. 5.5 hours (fully charged) (When using the AC adaptor included with the unit)
Dimensions:
Width: 3" (76 mm) Height: 29/32" (22.9 mm) Depth: 3-9/32" (83 mm)
Weight:
0.33 lbs. (148 g) with rechargeable battery
Input jack:
Line/optical digital
Output jack:
Earphones (impedance: 32 ohms)
Type:
Portable MiniDisc recorder
Signal readout:
Non-contact, 3-beam semiconductor laser pickup
Audio channels:
Stereo 2 channels/monaural 1 channel
Frequency response:
20 - 20,000 Hz ( 3 dB)
Rotation speed:
Approx. 400 - 1,350 rpm
Error correction:
ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding:
ATRAC/ATRAC3 (Adaptive TRansform Acoustic Coding), 24-bit computed type
Recording method:
Magnetic modulation overwrite method
Sampling frequency:
44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz, and then recorded.)
Wow and flutter:
Unmeasurable (less than 0.001 % W. peak)
Battery life:
Input sensitivity:
Output level:
The continuous recording time is for analog inputs
when the volume level is set to "VOL 0".
The continuous play time shows the value when the
volume level is set to "VOL 15".
The above values are the standard values when the
unit is charged and used at an ambient temperature of
77°F (25°C).
The operating time when using an alkaline battery
may be different, depending on the type and manufac-
turer of the battery, and on the operating temperature.
Stereo 2 times long 4 times long
When using the rechargeable
battery (fully charged) included
with the unit
Continuous
recording:
Approx. 7
hours
Continuous
play: Approx.
11 hours
Continuous
recording:
Approx. 9.5
hours
Continuous
play: Approx.
13 hours
Continuous
recording:
Approx. 12.5
hours
Continuous
play: Approx.
15 hours
When using one, commercially
available, high capacity, "AA"
size (LR6), alkaline battery (The
rechargeable battery is in the
unit, discharged.)
Continuous
recording:
Approx. 6
hours
Continuous
play: Approx.
15.5 hours
Continuous
recording:
Approx. 9.5
hours
Continuous
play: Approx.
19 hours
Continuous
recording:
Approx. 13
hours
Continuous
play: Approx.
22 hours
When using one, commercially
available, high capacity, "AA"
size (LR6), alkaline battery with
the rechargeable battery (fully
charged)
Continuous
recording:
Approx. 15.5
hours
Continuous
play: Approx.
27 hours
Continuous
recording:
Approx. 23
hours
Continuous
play: Approx.
32 hours
Continuous
recording:
Approx. 30
hours
Continuous
play: Approx.
38 hours
Reference input
level
Input impedance
LINE 100 mV 20 kohms
Specified
output
Maximum
output level
Load
impedance
Earphones - 10 mW +
10 mW
32 ohms
LINE 250 mV
(-12 dB)
- 10 k ohms
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