Hitachi TRQ 717 Service Manual

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HITACHI

Hitachi. Ltd. Tokyo Japan

TRANSISTOR STEREO
TAPE RECORDER

MODEL TRQ-7I 7

SERVICE MANUAL

N0. 168 1986

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS
POWER SUPPLY RATING --------- AC:120V 50/609; or
210V/230V 50%

POWER CONSUMPTION-- -~~60W
RECORDING SYSTEM ----- ----AC bias
ERASING SYSTEM AC erase
AUDIO OUTPUT -------- .. 1.5 W x 2

----50~15,000cps at 71/2 ipsspeed
50~95500 cps at 33/4 ips speed
50~5,500 cps at 17/5 ips speed

FREQUENCY RANGE -»

INPUT IMPEDANCE
MICROPHONE TERMINALr-m-Gkn,
LINE-IN TERMINAL w ----330kQ
REC./P.Bi SOCKET--~- .SkQ
OUTPUT IMPEDANCE
EXT. SPEAKER TERMINAL-.89
REC/RB. TERMINAL-- "6009,
MECHANICAL CHARACTERISTICS
TAPE SPEED ------------------------ 7/2 ips (Ich/s)
33h ips(9.5cm/s)
17/5 ips (4.750m/s)
. ..................... 7* (18cm), 5' (13cm) &
3/3' (8.50m)

TAPE REEL

RECORDING 0R PLAYING
TIME .................................... Stereo (using 7', 35a tape)
1.5 hr at 71/: ips speed
3 hr at 33/4 ips speed
6 hr at 17/3 ips speed
Monaural (using 7, 35;: tape)
3 hr at 71/2 ips speed
6 hr at 33/4 ips speed
12 hr at 17/5 ips speed
REWINDING TIME ------ -- Less thané min. using 7', 50p 31
FAST FORWARDING TIME~--Less than4 min. using 7, 50/1 tape
COMPONENTS USED
TRANSISTORS --------------------- ZSB73 (B) x 2, 28875 (C) x 4
ZSB89 (C) x 2, 253367 (B) x 4
ZSB370 (A) x I, ZSB370 (B) x 2

DIODES ................................. IN34A x 4,
15310 x 4
THERMISTORSH 0413 x 5
LOUDSPEAKER 4 x 6'PM X 2
MICROPHONE-v ~--Dynamic microphone x2
MISCELLANEOUS
TRACK SYSTEM 4 track stereo

DIMENSIONS ------ 13/71? (H)x15%-‚¬' (W) x
7%(D)
(347 x 38.9 x 18.6cm)

WEIGHT .............................. 24_ 2 11,5 (11kg)

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MODEL 'I'RQ-7I7 SERVICE MANUAL

DESCRIPTION
Special Features 4. Tone quality control
1. 4«track, Zechannel system for stereo recording and Depending on preference, the machine can be control-
reproducing. led for soft or sharp tones or {or a variation of tone in
2. Levelmatic device between.
Since the level adjustment during recording is 5. Recording and playback terminals according to DIN
au tomatic,a recording without distortion can be performed, standard
even when a sound of great intensity enters into the If the stereo set has recording and playback terminals
machine suddenly. of the same standard, the connection for recording and
3. All-transistor system, maximum total output of SW. player can be performed with one cord, regardless 0

stereo or monaural sound,

CONTROLS

PAUSE
BUTTON

TAPE
COUNTER

TAPE SPEED
SELECTOR

GNrDF F
SWITCH

LEVE'L
METERS

TONE
VOLUME CONTROLS
CONTROLS

FAST FORWARD BUTTON

RECORDING BUTTON
FORWARD BUTTON

REWIND BUTTON
STOP BUTTON

Fig. 1
EXTERNAL
SPEAKER
MICROPHONE JACKS
JACKS
SPEAKER
SWITCH
L\NE-\N
JAOKS REC. /P.B.
TERMINAL
Fig 2 Fig. 3