Hitachi HRD-MD58 Service Manual

HRD-MD58
[ES, VS, KS, ZS, VK, BS, SA, EW]
= HTY-38300
Il Y-8600
CONTENTS
SPECIFICATIONS
DISASSEMBLY ......
ADJUSTMENT ouu.eecccccsscccsessesseseeeeeeeeesnsanssessessenesarneeee
EXPLANATION OF NEW PARTS ...
PRINTED WIRING BOARD ..........
CIRCUIT DIAGRAN ..........
BLOCK DIAGRAM uu... ccccccccsccscseeceeeeeeeeetnetneerttentaeeenenes
EXPLODED VIEW
(Cabinet) -cesiscccsisciiiilecceactlstaiycetcsastnccctevecece esa seetesss
(Cassette chassis) .....
WIRE LAYOUT DIAGRAN ....... at
REPLACEMENT PARTS LIST u.....ccccscsseseeeseeenseeee ceeeeee
=]
=
W
(nl {nn
IRS)
SAFETY PRECAUTIONS
SPECIFICATIONS
@ GENERAL
MW(AM): 522—1,611 kHz (@ kHz steps)
(except EW)
Power supply: AC: 220V, 50 Hz (for ES, VS, KS, ZS, VK)
AC: 240V, 50 Hz (for BS, SA) ni ate Sot ene
AC: 110—120V/220—220V/230—240V, Sensitivity: EM: 1.32V (13 ; Bt)
BOlEO Hz for EW! MW(AM): 40 je (SIN 2648)
Power consumption: 280W LW: 400 ; Vv Aa /N 26 dB)
Dimensions: 370(W) x 284(H) x 285(D} mm : .
Weight: 88 kg ; (for ES, VS, BS, VK)
S/N ratio: FM: 72 dB(mono), 68 dB(stereo) (IHF)
@ AMPLIFIER SECTION 63 dB (mono), 58 di (stereo)
Power output (Bothchannels
50 W/ch + 50 W/ch (8 ohms, 1 kHz, T.H.D.
(IEC, unweighted, 0-pe ak)
driven):
0.7%)
60 dB (mono), 55 di (stereo)
Tota! harmonic distortion: 0.05% (at 1/2 power output) (IEC, weighted, Q-pak )
Input sensitivity/impedance:
PHONO: 3mV/47 kohms
MW(AM): 50 dB
(except W.Germany and Italy) FM selectivity: 60 dB (+300 kHz)
3.5 mV/47 kohms Stereo separation: 40 dB (1 kHz)
(for W.Germany and Italy) (except W.Germany andita By)
AUX: 90mV/22 kohms Antennas: FM: External antenna
(except W.Germany and Italy) (75 ohms, unbalaned)
120mV/22 kohms MW(AM)/LW: Loop antnne or external
(for W.Germany and Italy) antenna
Load impedance: Speaker: 8 to 16 ohms TAPE DECK SECTION
S/N ratio (IHF A network): PHONO: 70 dB Track system: 4tracks 2 channels ster
AUX: 76 dB Recording system: AC bias
@ TUNER SECTION Tape: Normal, Chrome (CrO2),Me tal
Reception frequency: FM: 87.50—108.00 MHz (50 kHz steps) Frequency response: Normal: 40— 14,000 Hz
MW(AM): 522—1,611 kHz (9 kHz steps)(for EW) CrOz2: 40— 15,000 Hz
530—1,710 kHz (10 kHz steps)(for EW) Metal: 40— 16,000 Hz