Hitachi HA M44 Service Manual

Page 1

No.326 EGF

@HITACHI

'SERVICE MANUAL 44

CONTENTS - INHALT ISOMMAlHE

SPECIFICATIONS . TECHNISCHE DATEN -
CAHACTEHISTIOUES TECHNIQUES ------------------------ 1.2

W4. DISASSEMBLV AND REPLACEMENT - ZERLEGUNG

4 . .

wmfly/w C? 1M, UND AUSTAUSCH - DEMONTAGE ET REMONTAGE a
:, //1/,§z///1/Z11//3f,;/ BLOCK DIAGRAM - BLOCK SCHEMA - SCHEMA u --

///
«fl/qw //y// 5;;77/
MM1/ '

PRINTED WIRING BOARD ~ PRINTFLMTEN -
f PLAN DE EASE ............................................. 5
A 2 CIRCUIT DIAGRAM - SCHALTPLAN -
z FUN DE clnCUIT ............................... , ........... u
j 1,! REPLACEMENT PARTS LIST t ERSATZTEILLISTE '
_ - ' 17' TABLEAU DES PIECE ....................................... 7
FRONT AND REAR FANEL . VORDERE UND HINTERE
A» BEDIENUNGSTAFEL' PANNEAUX AVANT ET AHHIERE ----- 11

SAFETY PRECAUTION
The lollowing precautions should be observed when servicing,
I. Since many parts in Ihe unit have special salary related characterisllcs. always use genuine Hitachis Iaplacemenl parts. Especially
critical parls In the powy circuit block should not be replaced with other makers-
Cruical parts are malked with A In the SChBMiItE diagram and circuit board diagram.
2, Belole returning a repelled unit lo the customer. the service technlcmn must thoroughly test the on" to ascertain mal il ls complelely
sale to operate without danger oi elecllical shock.

A
SPECIFICATIONS
POWER output 60 watts per channel, Output level
(Both channels driven) min. RMS, at 3 ohms from TAPE REC OUT 150 «IV
20 Hz to 20 11. with no Phone overlnad late] (at 1 kHz) (MM) 120 mV (MC) 12 mV
more than 002% mm SIWHM°'5° "M
harmonic distortion (IHF A nemark)
' PHONO (MM) 84 dB (MC) 66 dB
RMS Raled Output power 60 Watts TUNER AUX TAPE 1 2 95 dB
A, (Bolh Channels driven) (1 kHz, 8 ohms TJ-LD. (102%, SINUS) Damping ,fanlol" 30 (I kHz 8 ohms)
60 Watts . .
Bass control :8 dB (100 Hz)
. . . (20 Hz - 20 kHz, 8 ohms T.HrD. (102%) Trcble control :8 dB (10 kHz)
Harmonic dislomon (8 ohms) Subnonic mm 20 H7.
(at rated 0".9'") . . 0.02% Loudness control +6 dB (100 Hz)
Intennndulatmn drstomon * +4 dB (10 kHz)
(at 1/2 ram! output) 0.02% Powcr supply AC 120V 60 Hz
Power bandwidth 10 Hz- 40 kHz N220 V 50/60 Hz N240V 50/60 Hz
(8 ohms THDI 0.05% 1/2 Rated) ~l20/220/240 V IO/GO Hz
Frequency characteristics P r 4:0 It 120 W 1 1/10 Ted 0 t I
TUNER, Aux, TAPE 1.2 20 Hz- 40 kHz ( raga) "3 sm '° [90 w E; 1/3 red 33)
PHONO 30 Hz- [5 kHz RIAA 1:05:13 350 W (at and output)
Input sensllivity/Impcduuc: i . 5 W X
PHONO (MM) 2.5 mvm kiohms 335T: 237 k; ) 83 (H) X 2900)) m'"
(MC) 0.25 mV/Ioo ohms '
igygghggf 2 $3232: {0:25 * Measured pursuant lo the Federal Trade Cummissions Trade
'0 s Rzgulalion Rule on Power Output Claims for Amplifiers,
A

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

STEREO AMPLIFIER

July 1982 TOYOKAWA WORKS