Hitachi HRDMD 50 Service Manual

Page 1

(0..) HITACHI TY No. 593 EGF

HRD-MD50
SERVICE MAN UAI. res, as, KS, ES, vs, 25, SA, EW]

TNn52iZ§Wal53 chassis

r----- CONTENTS E
SPECIFICATIONS .
DISASSEMBLY .
ADJUSTMENTS
LUBRICATION .,
MAINTENANCE
CIRCUIT DIAGRAM .
DESCRIPTION OF NEW PART
EXPLODED VIEW
(Cabinet) ............
(Cassette chassis)
REPLACEMENT PARTS LIS
PRINTED WIRING BOARD
BLOCK DIAGRAM ............

TABLE DES MATTERES

INHALTSVERZEICHNIS

TECHNISHCE DATEN CARACTERISTDUES TECHNIQUES .

DEMONTAGE ...... DEMONTAGE 5
EINSTELLUNGEN REGLAGE ...... 1a
SCHMIERUNG ..... LUBRIFICATION 22
PFLEGE DEs GERATS . ENTRETIEN .. 22
SCHALTPLAN .......... PLAN DE CIRCUIT. 23-27, 42
BESCHREIBUNG DER NEUEN BAUTEILE DESCRIPTION DES NOUVELLES PIECES . .. 28
EXPLOSIONSANSICHT VUE EXPLOSEE

(Chassis) ............... (Col-fret) .................

(Chassis de Cassette)
TABLEAU DES PIECES .

(Cassettardech-Chas
ERSATZTEILLISTE

PRINTPLATI'EN PLAN DE BASE . 41
BLOCKSCHEMA .. SCHEMA
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 Hitachi's
replacement parts. Especially critical parts in the power circuit block should not be replaced with other makers.
Critical parts are marked with A in-the circuit diagram and printed wiring board.

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.

oGENERAL SPECIFICATIONS CAMPLIFIER SECTION
Power Supply: AC 120V, 60 Hz [for CS] Audio Output: 50W + 50W (8 ohms. 1 kHz, T.H.D [17%) BTL
2C 220V15° 1 5515' V5] Tone Control: 63 Hz : 10 dB, 250 H1 1- 10 dB,1 kHz 1 10
0 240150 Hz [for 88. SA] (13,4 kHz i ll) 115,15 kHz : 10 dB
Ac 110-12ov, zoczzov, 230-240v. Mp, Senmlviw am,
50/60 [for EW]
Im an : PHONO: 3 V150 k h
Power Consumption: 200W 250VA [for CS] PM ca CD' 202 mV,5:k;,sms
_ 320w [except CS] Load Impedance: Speaker: 6 to 16 ohms
Dimensrons: 370 (W) x 296 (HI x 300 ID) mm Headphones' 100 ohms

Weight: 9 kg

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

STEREO TUNER-AMPLIFIER DOUBLE CASSETTE RECORDER
July 1988 YOKOHAMA WORKS