Hitachi TRKW 55 E Service Manual

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@ HITACHI

SERVICE

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MANUAL

Tar No.1959E

TRK-W55E/E(BS)

KEY TO ILLUSTRATIONS

FM STEREO INDICATOR
TELESCOPIC ANTENNA (AERIAL)
TONE CONTROL

VOLUME CONTROLS

FUNCTION SELECTOR
SPEAKER/INNER MIC. SELECTOR
SPSS SWITCH

LOUDNESS SWITCH

MODE SELECTOR

TAPE SELECTOR

BAND SELECTOR

TAPE COUNTER

COUNTER RESET BUTTON
TUNING CONTROL

BUILT»|N MICROPHONE (RIGHT)
RECORD BUTTON
PLAYBACK BUTTON
REWIND BUTTON

FAST FORWARD BUTTON
STOP/EJECT BUTTON
PAUSE BUTTON

TAPE

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CONTENTS

SPECIFICATIONS ............... 2
DISASSEMBLY ................. 3
ADJUSTMENT ................. 4
INSPECTION OF MECHANISM ...... 7
LUBRICATION ................. 7
DIAL CORD STRINGING .......... 8
SCHEMATIC DIAGRAM ........... 9
CIRCUIT BOARD DIAGRAM ...... 14
REPLACEMENT PARTS LIST ....... I7
EXPLODED VIEW ............... 19

HEADPHONES SOCKET

MIXING MICROPHONE SOCKET
MIXING MIC VOLUME CONTROL
TAPE m INDICATOR

TAPE INDICATOR

PAUSE BUTTON

STOP/EJECT BUTTON

FAST FORWARD/CUE BUTTON TAPE m
REWIND/REVIEW BUIION
PLAYBACK BUTTON /
LEVEL INDICATORS

spss INDICATOR

BUILT-IN MICROPHONE (LEI-T)

I SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

FM/SW/MW/LW RADIO CASSETTE TAPE RECORDER

July 1983

TOKAI WORKS

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TRK-WSSE/E(BS) l

SAFETY PRECAUTIONS

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 A in 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

General Section Tape Recorder Section

Semiconductors:

Power Supply:

Power Consumption:

Power Output:
Speaker:

Dimentions:
Weight:

Radio Section
Circuit System:

Tuning Range:

Intermediate
Frequency:

Sensitivity:

Antennas(Aerials):

ICs: 7
Transistors: 18 [ For E ]
l7 [ For E(BS)]
Diodes: 16
LEDsf 9
AC: 220V, 50Hz [ For E]
240V, 50Hz [ For EIBSI]

DC: 12V (IEC R20 X 8 or

equivalent)
Car: Use car battery adaptor
18W
9W M.P.O. (AC operation)
3W/CH (T.H.D. 10% DC)
Woofer: 12cm, 4 ohms x 2
Tweeter: 2cm, 300 ohms x 2
589(W)x240(HIx143(D)mm
6.5kg (with batteries)

FM/SW/MW/LW super»
heterodyne

FM: 87.5 to 108MHz
SW: 6 to 1BMH2

MW: 530 to 1,605kHz
LW: 150 to 350kHz

FM: 10.7MHz
AM: 465kHz
FM: 11dB (pra.), 3dB (max.)
SW: 30dB (pra.), 20dB (max.)

MW: 47dB (pra.), 37dB (max.)

LW: 52dB(pra.), 46dB (max.)

FM/SW: Telescopic antenna

MW/LW: Built-in ferrite core
antenna

Tape:

Track System:
Recording System:
Erasing System:

Frequency Response:

Signal to Noise Ratio:

Wow and Flutter:
Cross Talk:

Input Sensitivity
and Impedance:

Output Level and
Load Impedance:

Distortion:

Erasing Ratio:
Fast Forwarding or
Rewinding time:
Motor:
Heads:

Cassette tape (03050.90)
4 track 2 channel stereo
AC bias, 55kHz

Quasi AC erase

Metal: 60 to 12,000Hz
Cr02: 60 to 11.000Hz
Normal: 60 to 10,000Hz
45dB

0.25% (WRMS)

Between tracks: 65dB
Between channels: 40dB

Mic: 0.6mV, 1.8k ohms

DIN in: 0.5mV/k ohm, 47k ohms

DIN out: 700 mV, 2k ohms
Headphone: 8 ohms-2k ohms
Ext. speaker: 4 ohms

3%

60dB

lOSsec (using C-GO)
DC micromotor
Permalloy