Hitachi TRK-3D70 - Page 3

TRK-3D70/3D75
SAFETY PRECAUTION
The following precautions should be observed when servicing.
1.
Since
many
parts
in
the
unit
have
special
safety-related
characteristics,
always
use
genuine
Hitachi’s
replacement
parts.
Especially
critical
parts
in
the
power
circuit
block
should
not
be
replaced
with
other
makers.
Critical
Parts
are
marked
with
‘\
in
the
circuit
diagram
and
printed
wiring
board.
2.
Before
returning
a
repaired
unit
to
the
customer,
the
service
technician
must
thoroughly
test
the
unit
to
ascertain
that
it
is
completely
safe
to
operate
without
danger
of
electrical
shock.
SPECIFICATIONS
General
Section
MW:
530
to
1.605
kH
Power
suppl
,
3
2
‘
pply
LW:
150
to
285
kHz
[W, AU, H, HC]
FM: 88 to 108 MHz
SW, : 7.0 to 22.0 MHz
AC 120V, 60Hz [H, HC]
AC 220V, 50Hz [E]
AC 110—127V/200—220V/
230-—250V , 50/60Hz [W}
240V, 50Hz [E (BS), AU]
Batteries DC 15V SW, : 2.3 to 7.0 MHz
IEC R20 x 10 or equivalent) MW: 530 to 1,605 kHz
Power (mains) TRK-3D70] Sensitivity FM: 13 dB (pra.}, 5 dB (max)
Consumption 60W SW: 30d8 (pra.}, 15 dB (max)
TRK-3D75] MW: 50 dB (pra.), 35 dB (max) f [E. E(BS)]
8OW LW: 55 dB (pra.), 40 dB (max)
Power output OOW P.M.P {AC operation) FM: 13 dB (pra.),5 dB (max)
E, E(BS)] SW: 30 dB (pra.), 20dB (max)! ww au H HC]
200W P.M.P (AC operation) SW, . 48 dB (pra.}, 35 dB {max} , aoa
W, AU,H, HC] MW: 50 dB (pra.), 35 dB {max}
31W (8W x 2 +15W) Intermediate FM: 10.7 MHz
(AC 10%THD} Frequency AM: 465 kHz [E, E(BS)]
j i TRK-3D70 AM: 455 kHz [W, AU, H, HC
piesa
562
x
201
ae
mm
Antennas
FM/SW/SW,:
Rod
antenna
E,
E(BS)]
(Aerials)
SW,
/MW/LW
:
Built-in
Ferrite-core
562
x
208
x
180
mm
antenna
Ww, AU, H, HC]
TRK-3D75] H
BAD DOT x 180:RiR Tape Recorder Section |
E, E(BS}} ape Compact Cassette (C30, C6C, C90)
842 x 208 x 180 mm Tracks system 4-track (2-channel stereo)
W, AU, H, HC}
Weight TRK-3D70) Tape Speed 4.75 cm/sec
6.8 kg [E, E(BS)} Recording System AC bias 57 kHz
7.0 kg [W, AU, H, HC] Erasing System Magnet
{including battery) Playback Frequency Metal tape:
TRK-3D75]
Response
60
to
12,000
Hz
[E,
E(BS)]
8.5kg
[E,
E(BS)}
50
to
14,000
Hz
[W,
AU,
H,HC]
8.7kg [W, AU, H, HC]
(including battery)
(HITACHI ME 90)
High bias tape (Chromium tape) :
60 to 11,000 Hz [E, E(BS)]
Semiconductors
TRK-3D70}
F
OF
eon
ned
Tents
17
[E,
E(BS)]
(HITACHI
SX90,
HITACHI=
XQ
0)
14 [W, AU, H, HC]
Normal tape:
j :
60
to
10,000
Hz
[E,
E(BS)]
Ps
a
Mi
te
He
AU]
50
to
12,000
Hz
[W,
AU,
H.HC]
LEDs:
3[E,E(BS))
Signal
to
Noise
Ratio
45
dB
4 [Ww AU, H, HC] Wow and Flutter 0.25% (WRMS)
; iy Crosstalk
ie
eeu)
8
Between
Tracks
60
dB
[E,
E(BS)}
r
H
Transistors:
18
[E,
E(BS)]
56 dB
[W,
AU,
H,
HC]
16
(W,
AU,
H,
HC}
Between
Channels
30
dB
Diodes:
37
[E,
£(BS))
Erasing
Ratio
60
dB
17 [W] Distortion 3%
16 [AU, H, HC} Head Permalloy
LEDs:
4[e
E(BS)]
Motor
Electrical
DC
micro
motor
. / Input Sensitivity CD/Line in: 600 mV, 25 kaims
{(W, AU, H, H
SU EH NEI and Impedance
Radio Section
FM/SW/MW/LW 4-band
Output Level and
Load Impedance
Headphones: 8 ohms to 300shns
Ext. speakers (Surround) : 1} oh ms
Circuit System
superheterodyne [E, E(BS)]
FM/SW, /SW2/MW 4-band
superheterodyne [W, AU, H, HC]
[E, E(BS)]
FM: 87.5 to 108 MHz
SW: 6.0 to 18.0 MHz
Tuning Range