Hitachi TRQ 710 Service Manual

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HITACHI

Hltachl. Ltd. Tokyo Japan

TRANSISTOR TAPE RECORDER

MODEL TRQ-710

SERVICE MANUAL

No. l 9 8 l 9 6 8
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS TAPE REEL 7 (18m), 5 (13mm 3% (Esm)

POWER SUPPLY RATING ------ AC1120V 50/60Hz(A)
ACIZIOV/ZSOV 50Hz(E)

POWER CONSUMPTION ------ 55W

RECORDING SYSTEMu >--AC bias

ERASING SYSTEM AC erasing

FREQUENCY RANGE--~ ---50~15,000Hz at 7% ipa speed
50»9,500Hz at 3% ips speed

CONTINUOUS R.M.S. AUDIO OUTPUT ------ 2. SW or more

PEAK AUDIO OUTPUT --------------- 5W or more

RECORDING OR PLAYING TIME
60 min. using 7 (50;!) tape at 7% ips speed
120 min. using 7* (50p) tape at 3% ips speed
240 min. using 7 (50;!) tape at 1% ips speed
REWINDING TIME ------ 4 min. using 7', 50/: tape
FAST FORWARDING TIME ------ 4 min using 7. 50/1 tape
COMPONENTS USED
TRANSISTORS ----------- ZSB 73(3))(1, ZSCZBIQC) >42,
ZSB 77(B)><4, ZSB3S7(B))

INPUTSIOUTPUT IMPEDANCE---MIC. JACK 10Kohms DIODES-v -1N34A><2. 15310x4
RADIO JACK 1201(0th THEMISIORS- AD-IEXZ
EXT. SP. JACK 8 ohms LOUDSPEAKER~~ m6x4 (15x10ml) PM
TRQ-710 (E) only --------------------- REC/RB. SOCKET MICROPHONE ~- Dynamic microphone
LINE INPUT 1,2Kohms MISCELLANEOUS
LINE OUTPUT 151(0th TRACK SYSTEM ,. -Monaural dual track
MECHANICAL CHARACTERISTICS DIMENSIONS -------- 13%(H) X 15%(W)X 7%(D)
TAPE SPEED --------------- 7% ips (19m/s) (35x40x18,5cm)
3% ips (9. Sen/s) WEIGHT --------------------- 24 lbs (11kg)
17/5 ips (4.75cn/s)
ACCESSORIES
TRQ-710(A) ------------------ MICROPHONE ------------ 1 TRQA710(E) .................. MICROPHONE
5 REEL --------- 1 5" REEL- 2

REEL HOLDER ~- « 2
EXTENSION CORD 1

REEL HOLDER ..

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1.

MODEL 'I'RQ-TIO SERVICE MANUAL

7-

CONTROLS AND J ACKS

TAKEUP REEL

REWIND REEL SHAFT

SHAFT

TAPE SPEED HEAD COVER
SELECTOR
SPEAKER
A UNTE
SWITCH T PE co R
RECORDWG HLOT LAMP
LEVEL
INDmATOR TONE CONTROL
MwROPHONE
JACK ON-OFF SWWCH
& VOLUME CONTROL
RADD JACK
EXTERNAL
ING STOP FAST F0
SPEAKER JACK §5$$§fi BUTTON RWARD BUTTON
REWIND BUTTON PLAY BUTTON
Fig 1
TO CHANGE OVER POWER VOLTAGE

COVER
(in case of TRQ-710E)

Voltage change-over plug is provided in the accessory
compartment and covered with the panel.

Remove two screws holding the panel.

Reinsert the voltage change-Over plug to jack: of
suitable voltage as shown in Fig. 2.