Hitachi TRK 7910 E Schematic

Page 1

@ HITACHI TK No.1679E

SERVICE MANUAL TRK-79OEIEIBSIIEZ

CONTENTS

SPECIFICATIONS ................................................... 2
DISASSEMBLY ......................................................... 2
DIAL CORD STRINGING ....................................... 4
LUBRICATION ......................................................... 4
INSPECTION ............................................................ 4
ADJUSTMENT ......................................................... 5
SCHEMATIC DIAGRAM

Tuner section ............................................................ 7
Tape recorder section ................................................ 11
CIRCUIT BOARD DIAGRAM

Tuner section ............................................................ 9
Tape recorder section ................................................ 13
WIRING DIAGRAM ................................................... 15
REPLACEMENT PARTS LIST .............................. 18
EXPLODED VIEW ...................................................... 19

KEY TO ILLUSTRATIONS

BUILT IN MICROPHONE(RIGHT)
AFC SWITCH

FM MODE SWITCH

TAPE COUNTOR

LED LEVEL INDICATORS

FM STEREO INDICATOR

SLEEP OFF/SNOOZE BUTTON
SLEEP ON BUTTON

TIMER BUTTON

TIME SET BUTTON

MINUTE SET BUTTON

HOUR SET BUTTON

BUILT IN MICROPHONE(LEFT)
TIME DISPLAY

AC POWER (MAINS) INDICATOR [E(BS)]

BALANCE CONTROL
BASS CONTROL

TREBLE CONTROL
VOLUME CONTROL
PAUSE BUTTON

FAST FORWARD BUTTON
FUNCTION SELECTOR
REWIND BUTTON

TAPE SELECTOR
PLAYBACK BUTTON
RECORD BUTTON
POWER SWITCH
STOP/EJECT BUTTON
TELESCOPIC ANTENNA(AER|AL)

BAND SELECTOR
TUNING CONTROL

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--SAFETY PRECAUTION

The following precautions should be observed when servicing.

1. Since many parts in the unit have special safety-related characteristics, always use genuine Hitachis replacement
parts. Especially critical parts in the power circuit block should not be replaced with other makes.
Critical parts are marked with Am the schematic diagram and circuit board diagram.

2. Before returning a repaired unit to the customer, the service technician must thoroughly test the unit to ascertain
that it is completely safe to operate without danger of electrical shock.

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

CASSETTE TAPE RECORDER WITH FM/SW/MW/LW RADIO