Service manual

MD-MT15/15C/15H/15W/161E/18H
– 3 –
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
MD-MT15/15C
MD-MT15H
■ General
Power source:
DC 5V: AC adaptor (AC 120V, 60 Hz)
DC 3.0V: Commercially available, “AA” size (LR6), alkaline
battery x 2
DC 2.4V: Optional Rechargeable Nickel-Metal Hydride bat-
tery (AD-T20BT) x 1
DC 4.5V: Optional car adaptor, AD-CA20X
(for cars with a 12-24V DC negative ground elec-
trical system)
Power consumption:
7.5 W (AC adaptor)
Output power:
RMS; 20 mW (10 mW + 10 mW)
(0.2% T.H.D.)
Charging time:
Approx. 4 hours (90 %)
Approx. 6 hours (fully charged)
(When using the AC adaptor included with the unit)
Battery life:
When using the optional re-
chargeable battery AD-T20BT
(fully charged)
When using two, commercially
available, high capacity, “AA”
size (LR6), alkaline batteries
Continuous recording:
Approx. 7.5 hours
Continuous recording:
Approx. 7.5 hours
Continuous play:
Approx. 12 hours
Continuous play:
Approx. 15 hours
MD-MT15W
MD-MT18H
SPECIFICATIONS
MD-MT161E
MD-MT15H/18H/161E
Power source:
DC 3.0V: Commercially available, “AA” (LR6) size, alkaline
battery x 2
DC 2.4V: Optional Rechargeable Nickel-Metal Hydride bat-
tery (AD-T20BT) x 1
DC 4.5V: Optional car adaptor, AD-CA20X
(for cars with a 12-24V DC negative earth electri-
cal system)
DC 5V:
Optional AC adaptor (AD-T20APH, AC 220 - 230V,
50/60 Hz)
Power consumption:
7 W (Optional AC adaptor)
Output power:
RMS; 20 mW (10 mW + 10 mW)
(0.2% T.H.D.)
Charging time:
Approx. 4 hours (90 %)
Approx. 6 hours (fully charged)
(When using the AC adaptor)
Power source:
DC 3.0V: Commercially available, “AA” size (LR6), alkaline
battery x 2
DC 2.4V: Optional Rechargeable Nickel-Metal Hydride bat-
tery (AD-T20BT) x 1
DC 4.5V: Optional car adaptor, AD-CA20X
(
for cars with a 12-24V DC negative earth electrical
system)
DC 5V: Optional AC adaptor (AD-T20APE, AC 230 - 240V,
50/60 Hz)
Power consumption:
7 W (Optional AC adaptor)
Output power:
RMS; 20 mW (10 mW + 10 mW)
(0.2% T.H.D.)
Charging time:
Approx. 4 hours (90 %)
Approx. 6 hours (fully charged)
(When using the AC adaptor)
Power source:
DC 5V:
AC adaptor (AC 220 - 230V, 50/60 Hz)
DC 3.0V: Commercially available, “AA” (LR6) size alkaline
battery x 2
DC 2.4V: Optional Rechargeable Nickel-Metal Hydride bat-
tery (AD-T20BT) x 1
DC 4.5V: Optional car adaptor, AD-CA20X
(for cars with a 12-24V DC negative earth electri-
cal system)
Power consumption:
7 W (AC adaptor)
Output power:
RMS; 20 mW (10 mW + 10 mW)
(0.2% T.H.D.)
Charging time:
Approx. 4 hours (90 %)
Approx. 6 hours (fully charged)
(When using the AC adaptor included with the unit)
Power source: DC 3.0V [Commercially
available, “AA” size (LR6),
alkaline battery x 2]
DC 4.5V [Optional car
adaptor, AD-CA20X (for
cars with a 12-24V DC
negative earth electrical
system)]
Output power: RMS; 20 mW (10 mW + 10
mW) (0.2% T.H.D.)
Dimensions: Width 87.9 mm (3-7/16")
Height 29.8 mm (1-3/16")
Depth 79.7 mm (3-1/8")
Weight: 180 g (0.40 lbs.) without
battery
Input socket: Line/optical digital, micro-
phone (powered by the
main unit)
Output socket: Earphones (impedance:
32 ohms)
Battery life:
● The continuous recording time is for
analogue 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 val-
ues when the unit is used at an ambient
temperature of 20°C (68°F).
● The operating time when using alkaline
batteries may be different, depending on
the type and manufacturer of the bat-
ter
y
, and on the operatin
g
temperature.
Input sensitivity:
When using two, commercially available, high
capacity, “AA” size (LR6), alkaline batteries
Continuous recording: Approx. 7.5 hours
Continuous play: Approx. 15 hours
Output level:
Specified
output
Maximum
output
level
Load
impedance
Earphones
—
10 mW +
10 mW
32 ohms
LINE
250 mV
(-12dB)
—
10 k ohms
Recording
level
Reference input
level
Input
impedance
MIC H 0.25 mV 10 k ohms
MIC L 2.5 mV 10 k ohms
LINE
100 mV 20 k ohms
■ MiniDisc Recorder
Unmeasurable (less than ±0.001% W. peak)
● 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 68°F (20°C).
● The operating time when using an alkaline battery may be different, depending on the
type and manufacturer of the battery, and on the operating temperature.
Input sensitivity:
Recording level Reference input level Input impedance
MIC H 0.25 mV 10 k ohms
MIC L
2.5 mV 10 k ohms
LINE 100 mV 20 k ohms
Output level:
Specified
output
Maximum
output level
Load
impedance
Headphones — 10 mW + 10 mW 16 ohms
LINE
250 mV
(-12dB)
—
10 k ohms
Dimensions: Width: 3-7/16" (87.9 mm)
Height: 1-3/16" (29.8 mm)
Depth: 3-1/8" (79.7 mm)
Weight: 0.40 lbs. (180g) without battery
Input jack: Line/optical digital, microphone (powered by the main unit)
Output jack: Headphones (impedance: 19 ohms)
Type: Portable MiniDisc recorder
Signal readout: Non-contact, 3-beam semi-conductor laser pick-up
Audio channels: Stereo 2 channels/monaural (long-play mode) 1 channel
Frequency response:
20 – 20,000 Hz (± 3 dB)
Rotation speed: Approx. 400 – 900 rpm
Error correction: ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding: ATRAC (Adaptive Transform Acoustic Coding), 24-bit com-
puted 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:
Output level:
Specified
output
Maximum
output level
Load
impedance
Earphones — 10 mW + 10 mW 32 ohms
LINE
250 mV
(-12dB)
—
10 k ohms
Dimensions: Width: 87.9 mm (3-7/16")
Height: 29.8 mm (1-3/16")
Depth: 79.7 mm (3-1/8")
Weight: 180g (0.40 lbs.) without battery
Input socket: Line/optical digital, microphone (powered by the main unit)
Out
p
ut socket: Earphones
(
impedance: 32 ohms
)