Hitachi TRQ 727 Service Manual

Page 1

HITACHI

Hitachi. LId. Tokyo Japan

TRANSISTOR
STEREO TAPE DECK

MODEL TKO-727

SERVICE MANUAL

No.190 1968

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS
POWER SUPPLY RATING ------ AC : 120V 50/60 Hz (U)
210V/230V 50 2 (E)

POWER CONSUMPTION:

RECORDING SYSTEM

ERASING SYSTEM -------------- AC erase

FREQUENCY RANGE ------------ 3()~18.(>(l() Hz at 7V, ips speed
30~IJI,000 Hz at 3% ips speed

INPUT IMPEDANCE
MICROPHONE TERMINAL-~10 K ohms

LINE-IN TERMINAL --------- 120 K ohms

REC./P.B. TERMINAL ---------- 1.2 K ohms
OUTPUT IMPEDANCE

LINE-OUT TERMINAL ------------ 2,7 K ohms

REC/FIB. TERMINAL ---------- 2.7 K ohms

OUTPUT VOLTAGE ------------ 0,775V
MECHANICAL CHARACTERISTICS

TAPE SPEED -------------------- 7'; ips (19cm/s)

3371 ips (9. 5cm/s)
17§ ips (4.75cm/s)
TAPE REEL --------- 7 (18cm), 5 (13cm) & 3/,x'(8.5cm)

RECORDING OR PLAYING
TIME -------------------------- ---Stereo (using 7', 35;: tape)
1.5hr at 7% ips speed
3hr at 3% ins speed
6hr at I}; ips speed
Monoural (using7, (IS/I tape)
3hr at 7% ips speed
6hr at 3% ips speed
12hr at 1% fps speed
REWINDING TIME ----------- 4 min. less than using 7', 50,1 tape
FAST FORWARDING TIME-MI min. less than using7', 50;: Iapc
COMPONENTS USED
TRANSISTORS --------------- 2587303) >( 2, 25C281(C) x 4
ZSB7S(F) >( 2, ZSBJI7()(B) >( 2
ZSBS70(A) X l

DIODES -------------------------- IN34A X G

SELENIUM RECTIFIER ---I

THERMISTOR --------------- D-lE X 1

MICROPHONE ~~~~~~~~~~~~~~~~~~ Dynamic microphone
MISCELLANEOUS

TRACK SYSTEM ~4-track stereo system

'1631"(H)X15%'(W)x 7%(0)
(40.8 x 39.6 x 1&5ch
WEIGHT ....................... 21 ,5 (95kg)

DIMENSIONS ------