Hitachi TRQ 707 Service Manual

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HITACHI

Hitachi. Ltd. Tokyo Japan

TRANSISTOR STEREO
TAPE RECORDER

MODEL TKO-707

SERVICE MANUAL

No.156 1968

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS
POWER SUPPLY RATING --------- AC:117V 60% or
210V/230V 50%

POWER CONSUMPTION

RECORDING SYSTEMr-

ERASING SYSTEM

AUDIO OUTPUT 25W x 2

FREQUENCY RANGE --------------- 50~15,000cps at 71/2 ips speed
50~9,500 cps at 33/4 ips speed
50~5,500 cps at 17/8 ips speed

INPUT IMPEDANCE
MICROPHONE TERMINAL.
LINE~IN TERMINAL --
REC./P.B. TERMINAL

OUTPUT IMPEDANCE
EXT. SPEAKER TERMINAL-~80,

REC./P.B. TERMINAL-- - 000
MECHANICAL CHARACTERISTICS
TAPE SPEED ------------------------ 71/2 ips (19cm/s)
35/4ips (9.5cm/s)
17/3 ips (4.75cm/s)
TAPE REEL - --------------------- 7 (186m), 5 (13cm) &
31/3 (8.5cm)

RECORDING OR PLAYING
TIME .................................... Stereo (using 7*, 35,, tape)
1.5 hr at 71/: ips Speed
3 hr at 33/4 ips speed
6 hr at 17/5 ips speed
Monaural (using 7, 35/4 tape)
3 hr at 71/2 ips speed
6 hr at 33/4 ips speed
12 hr at 17/3 ips speed
REWINDING TIME -------------~4 min. using 7', 50/1 tape
FAST FORWARDING TIME-~-4 min. using 7, 50/4 tape
COMPONENTS USED

TRANSISTORS ., --ZSB73 (B) x 2, 25375 (C) x 4
25889 (C) x 2, ZSB367 (B) x4
253370 (A) x 3, ZSCZSI (C) x4
250156 (A)

DIODESvu ~~IN34A x 4, 0A90 x 2, 15314
15310 x 6

TERMISTORS ----------------------- D IE x 5, 31D46

LOUDSPEAKEkuu- ---------------- 61/4' PM x 2

MICROPHONE ------------------------ Dynamic microphone

MISCELLANEOUS

TRACK SYSTEM ------------------ 4 track stereo

DIMENSIONS ------------------------ 811/5 (H) x143/4' (W) x
14' (D)

(22 x 37.5 x 35.5:m)
WEIGHT ........................... 31 lbs (14kg)

Ivr' [HIV-"r;

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MODEL "IQ-707 SERVICE MANUAL

DESCRIPTION

Special Features

1.

4Atraek, Zechannel system for stereo recording and
reproducing,

Autostopper (Automatic stopping device)

When playing back, fast forwarding or rewinding,
the recording tape used with this set will automatically
come to a complete stop at any optional position by
means of the automatic control device.

Levelmatic device

Since the level adjustment during recording is
au tomatic,a recording without distortion can be performed,
even when a sound of great intensity enters the machine
suddenly.

All-transistor system, intensive total output of SW.

Satellite speaker system

Hitachis high~performance speaker, positioned sym-
metrically on the right and left, ensures enjoyment of
perfectly-balanced stereo sound.

Tone quality control

Depending on preference, the machine can be Control
led for soft or sharp tones or for a variation of tone in
between.

Recording and playback terminals according to DIN
standard

If the stereo set has recording and playback terminals
of the same standard, the connection for recording and
player can be performed with one cord, regardless of

stereo or monaral sound.

CONTROLS

PAUSE BUTTON

TAPE SPEED
SELECTOR

VOLUME
CONTROLS

RECORDING
BUTTON

REWI ND BUTTON

STOP BUTTON

Fig.

MICROPHONE
JACKS

LINE-IN
JACKS

Fig. 2

FAST FORWARD BUTTON
FORWARD BUTTON

EXTERNAL
I SPEAKER
JACKS

MONITOR
SWITCH

REC/PB.
TERMINAL

Fig. 3