Hitachi HA 22 Service Manual

Page 1

TY No. 319 EGF

@HITACHI

SERVICE MANUAL HA-22

CONTENTS
":::;:/::;;;;Zw,,,,,,w FRONT AND REAR PANEL -
/73333535535271237ram, B LOCK DI AG RA M -- - - .. - -- .. - ~- -
JZZZ;;E/Z;£f/ ,5 DISASSEMBLY
/ // ,232 PRINTED WIRING BOARD
fl fizz; CIRCUIT DIAGRAM
55V REPLACEMENT PARTS LIST
/

SAFETY PRECAUTIONS

The lollowrng precautions should be observed when servlclng

I Since many parts In the arm have 509031 safety related ChaIflCIeVlSIICS, always use genuine Hitachi's replacement parts ESDBCIBIIY
crIIIcaI parIs In the power crrcult block should not be replaced With other makers.
Crllrcal parts are marked thh A In the sellerrtatru dldgldm and Clrcull board diagram

2 Belore returning a repaired unII to the customer, Ihe servrce technicran must Ihoroughly lest the Hull to ascerlaln that II rs completely
sale to operate Without danger ol electrlcal shock

SPECIFICATIONS
Power output 30 walls + 30 watts" min. Output level
(Both channels driven) RMS. at 8 ohms from 40 HI. to TAPE REIC OdllJT I 130 mg
kHz, with I, . a one over on eve (at I kill) I 0 m
123ml harmoniz:21:13:33" 0 I A Signl-to-noiso ratio (IHF. A network)
PHONO 72 dB
30W+30W TUNER,AUX/TV,TAPE 93 dB
(8 ohms, I kHz, T.H.D. 0.1% SINUS) Damping factor 20(1 kHz)
35 W/ch + 35 W/ch Bus control is dB (100 Hz)
(3 ohms, 4o 7 20 kHz. T.H.D., 01%) Treble eontrol 18 dB (10 kHz)
Power bandwidth 10 Hz - 30 kHz Laudnur COM-fol +6 dB (100 Hz)
(E ohms. T,H.D. 0.1% 1/2 Rated) +4 dB (10 kHz)
Frequency characteristics subsonic filter 20 Hz
TUNER. AUX/TV,TAPE 20 Hz - 40 kHz (+1 .0 , 3.0 an) Power supply AC l20 V 60 H1. ~220 V 50/60 Hz.
PHONO RIAA t 0.5 dB ~24o v 50/60 Hz or
Harmonic distortion ~ 120 V/220 V/240 V 50/60 Hz
(at rated output) Less than 0.1% Power consumption 70 W (at 1/10 rated output)
(at 1/2 rated output) Less than 0.1% 110 W(.1t 1/3 rated outpuI)
lntermodulztion distortion 180 W (at rated output)
(It 2 rated output) Less than 0.1% Dimenrions 435 (W) X 83 (H) x 235 (D) mm
Input sensitivity/Impedance Weight 4.8 kg
PHONO 2.7 mV/47 kohms
TUNER. AUX/TV 160 mV/40 1(0th Measurcd pursuant to the Federal Trade Commission's Trade Regulation
TAPE PLAY 160 "IV/40 kohms Rule on Power Output Claims for Amplifiers.

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

STEREO AMPLIFIER

April 1982 TOYOKAWA WORKS