Hitachi TRQ 730 D Service Manual

Page 1

HITACHI

Hitachi. Ltd. Tokyo Japan i

SOLID STATE
STEREO TAPE DECK

MODEL TRQ-730D

SERVICE MANUAL

No.311 1970

v

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS
POWER SUPPLY ----------------- AC 120V 50/60Hz
AC 100/120/210/230v 50/60Hz
POWER CONSUMPTION --------- 25W
RECORDING COMPENSATION SYSTEM ------ NAB
standard (JIS)
RECORDING SYSTEM -~ ~- -AC bias system
ERASING SYSTEM ----- -~-AC erasing system
FREQUENCY RANGE ------------ 30~23,000Hz at 7%ips
(at 1903/5)
30~15, OOOHZ at 3% ips
(at 9.5m/s)

INPUT IMPEDANCE
MICROPHONE JACK (MIC) ------ 10K ohm

DRASING FACTOR --------------- 601213 or over
BIASED OSCILLATION FREQUENCY ------ QSKHZiSKHZ
MECHANICAL CHARACTERISTICS

TAPE SPEED- 7% ips 3% ips and 1% ips
TAPE REEL --UP to 7 (178m) reel max.

PLAYING TIME -------------------- STEREO (using 7*, 35;: tape)

1. 5hr at 7% ips speed

3hr at 3%1 ips speed

6121- at 1% fps speed

MONAURAL (using 7, 35;!
tape)

3hr at 7% ips speed

6hr at 3% ips speed

12hr at 17/3 ips speed

INPUT JACK (LINE IN) ------ 10K ohm WOW & FLUTTER --------------- 0.12% (1904/5)
DIN JACK (REC/RB.) --------- 2K ohm 020% (9.5w/s)
OUTPUT IMPEDANCE OPERATION SYSTEM ------------ One-hand knob system
OUTPUT JACK (LINE OUT) ------ 10K ohm. COMPONENTS USED
DIN JACK (REC/RB.) --------- 10K ohmI TRANSISTORS --------------------- ZSC458 (LG) X8
INPUT SENSITIVITY (LEVEL) 2SC458X6, ZSC984><4
MICROPHONE TERMINAL ---400,uV or less ZSB370><1
INPUT TERMINAL. 40mV or less DIODES ................................. IN34AX2, HRI5AX4
DIN TERMINAL SOmV MISCELLANEOUS
OUTPUT SENSITIVITY (LEVEL) TRACK SYSTEM ------------------ 4~track, strack,stereophonic/ I
OUTPUT TERMINAL ------------ 775mV monophonic
DIN TERMINAL ------------------ 775mV DIMENSIONS ------------------------ 77(54(H)><16/{54(W)X13%4(D)
SIGNAL TO NOISE RATIO ---52dB or over (189X40I8X33-6m)
DISTORTION FACTOR -------- 1. 0% or less at standard WEIGHT ----------------------------- 21 lbs, 2 oz (9,5kg)

level

ACCESSORIES

79 empty reel -
Reel holders-m
Dust cover ......................

--1
"2
--1

Head cleaning tips-r-
PatCh cord
(for USA only)

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MODEL 'I'RG-73OD SERVICE MANUAL

CONTROLS

REEL HOLDERS

LEVEL METER

RECORDNG
VOLUME CONTROL

RECORDTNG"
BU

TTONS MONlTOR
MICROPHONE HEADPHONE SWITCH
JACKS JACK
Fig. 1
DTN JACK '
(REC/PB) LINE IN JACK LINE OUT JACK
LLINEIN-l
DTN SWTTCH 7
(DN OUT)
UNE OUT
LUHEOUTJ ADJUSTMENT
VOLUME

Dlu our LINE om ADJ.

(TERMINALS ARRANGED ON THE LEFT SDE AS\
\SEEN FROM THE FRONT )

Fig 2