Hitachi HA 1 Service Manual

Page 1

TY No. 371 EGF

@HITACHI

SERVICE MANUAL

HA-1

CONTENTS - INHALT SOMMAIRE

SPECIFICATIONS TECHNISCNE DATEN -
CARACTERISTIOUES TECHNIQUES ----------------- 1,2
FRONT AND REAR PANEL VORDERE UND
HINTERE BEDIENUNGSTAFEL- PANNEAUX
AVANT ET ARRIERE ..............................
BLOCK DIAGRAM- BLOCK SCHEMA SCHEMA H -
DISASSEMBLY AND REPLACEMENT ZERLEGUNG UND
AUSTAUSCH DEMONTAGE ET REMONTAGE ---------- 4
PRINTED WIRING BOARD PRINTPLAITEN
PLAN DE BASE
CIRCUIT DIAGRAM SCMALTPLAN PLAN
DE CIRCUIT .......................................... .
REPLACEMENT PARTS LIST ERSATZTEILISTE-
TABLEAU DES p'EcE ............................... 1'3

w;/,:,/M,,// ,,::::::;::;/¢m,,,4/3212, /

4

SAFETY PRECAUTIONS

The tollowing precautions should be observed when servrcing.

1. Since many parts in the unit have special satety 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 sate to operate without danger of electrical shock.

SPECIFICATIONS
Power output 30 watts + 30 watts min. Output level
(Both channels drlven)RMS, at 8 ohms from 40 Hz to TAPE REC OUT 160 mv

20 kHz, with no more than 0.5% Phone overload level

total harmonic distortion (3! 1 kHz) 100 MV

30 w + 30 w Slonel-to-nolle rotlo

(8 ohms. 1 kHz, n+0. 0.1% SINUS) "HF" "WW

35 W/ch + 35 W/ch ION" 72 15

(a 0th 40 _ 20 kHz. T.H.D.. 01 w TUNER, CD/AUX. TAPE 90 dB
Power bandwidth 10 Hz- 40 kHz Demplng (actor 20 (1 kHz)

(8 ohms, T.H.D. 0.1 as 1/2 Rated) 3' °""°' *5 5 00 HZ)
Frequency Treble control :8 dB (10 kHz)
cheructerletloe Loudneu control +6 dB (100 Hz)
TUNER. AUX/TV, TAPE 20 Hz~ 20 kHz (+1.0 - 3.0 dB) +4 dB 0 H
PHONO RIAA 1:05 68 Subeonlc mm -6 dB/oct. (20 Hz)

Power supply A0120 V 60 Hz,

Hennonlc dletortlon

(It voted output) Less than 0.1 96
(at 1/2 rated output) Less than 0.1 36
Intermodulatlon

dletortlon

(at 1/2 reted output) Less than 0.5%
Input uneltlvlty/

~220 V 50/60 HZ.

~ 240 V 50/60 Hz or

~120 V/220 V/240 V 50/60 Hz
Power coneumptlon 60 w(at I/10 rated output)

100w(at 1/3 rated output)

150W (at rated output)

Impedance Dlmenelone 435 (W) x 83 (H) X 230 (D) mm
PHONO 3.0 mV / 40 k-ohms w-Ieht 4.0 kg

TUNER, AUX/TV 160 mV/ 40 k-ohms

TAPE PLAY 160 mV/ 40 k-ohms 'Measured pursuant to the Federal Trade Commissions Trade

Regulation Rule on Power Output Claims lor Ampliliers.

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

STEREO AMPLIFIER
May 1983 TOYOKAWA WORKS"