Hitachi HTA 12 Service Manual

Page 1

@HITACHI

.SERVICE MANUAL

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The HTA-12 comes in two color verslons, black and silver.
They are the same except for parts list.

Der DITA-12 wlrd In zwel Verslonen geliefert, schwarz und silber.
Sle sind gleich mi! Ausnahme der Tellallste.

Le HTA-12 estdisponible en deux versions, noir et argent.
Elles sont identiques Ta Iexceptlon de la Ilste des pi'eces.

SAFETY PR ECAUTION

No. 411 EGF

HTA-12

(FT-12,HA-12)

r-TCONTENTS - INHALT ~ SOMMAIRE
SPECIFICATIONS ~ TECHNISCHE DATEN ~
CARACTERISTIOUES TECHNIQUES --------------- 1 ~4-
DIAL CORD SETTING - SKALENSEILEINSTELLUNG
EOUIPEMENT DE CADRAN ............................. 4
DISASSEMBLY AND REPLACEMENT- ZERLEGUNG UND
AUSTAUSCH DEMONTAGE ET REMONTAGE --------- 5
BLOCK DIAGRAM - BLOCK SCHEMA- SCHEMA --------- 6

GENERAL ALIGNMENT INSTRUCTION-
ALLGEMEINE AUSRICHTANLEITUNG

INSTRUCTIONS GENERALES --------------------------- 7
FM TUNER ALIGNMENT- ABGLEICH DES

UKw-TUNERs- REGLAGE DE TUNER FM ------------ 1.5
AM TUNER ALIGNMENT . ABGLEICH DES

AM-TUNERs~ REGLAGE DE TUNER AM ------------- 9,10
PRINTED WIRING BOAR INTPLATTEN'

PLAN DE BASE ............................. 11,13,1511

CIRCUIT DIAGRAM SCHALTPLAN -

PLAN DE BASE ............................. 12,14,16,17
FRONT AND REAR PANEL-

VORDERE UND HINTERE SEDIENUNGSTAFEL-

PANNEAUX AVANT ET ARRIERE ------------------- 18,19
REPLACEMENT PARTS LIST- ERSATZTEILISTE -
TABLEAU DES PIECE ............................ 20,, 25

The following precautions should be observed when servicing.

1. Since many parts in the unit have special safely related characteristics, always use genuine Hitachi's replacement parts.
Especially critical parts in the power circuit block should not be replaced with other markers

Critical parts are marked with A

in the circuit diagram and printed wiring board.'

2. Before returning is 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.

SPECIFICATIONS

Circuitry

AM/FM 2-band Stereo tuner
MW/LW/FM 3-band Stereo tuner
0 FM SECTION
Frequency range 88 - 108 MHz
Usable Sensitivity 11.2 dBf(lHF),1.0 uV (75 ohms DIN)
50 dB Quieting Sensitivity 22.4 (181 (MONO)
39.5 dBf (STEREO)
Image interference ratio 45 dB (98 MHz)
Total harmonic dlstortion MONO : 0.3 % (1 kHz)
STEREO : 0.4 % (1 kHZ)

Output voltage

0 AM (MW) SECTION
Frequency range
Sensitivity

Selectlvlty 50 dB
Stereo seperetlon 40 d8 (1 kHz)

[except for W. Germany & ItaIy]
Capture ratio 1.0 dB

550 mV (1 kHz)

530 -1,605 kHz

AOMV (DIN) . . . S/N 26 dB
20 ILV (IHF) 500 ILV/m
(IHF Loop antenna)

Signal-to-nolse ratio MONO : 75 dB (IHF) Image interterence ratlo 38 dB
65 dB (IEC unweighted, Selectivity 35 dB
O-peak) Slgnal-to-noise ratio 45 dB
60 dB (IEC, weighted, Output voltage 165 mV (400 Hz, 30% modulatIon)
099) 0 AM (LW) SECTION
STEREO: 2333822unwe1 ht d Frequency range 150 - 350 kHz
Omega) 9 e ' Sensltlvlty 200 Irv (DIN) . S/N 26 dB
55 dB (IEC, weighted, ' GENERAL
Q-peak) Dlmenslons 435(W) X 60(H) X 236(D) mm
Frequency response 50 Hz , 12 kHz (50 #5 21:2 dB) WGIQM 2-4 k9 (53 lbs)

50 Hz , 15 kHz (50 us :gg dB)
[for w. Germany 3. Italy] '

50 Hz-12 kHz (75 Ms :l:2 dB)
[for U.S.A. & Canada]

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

STEREO TUNER AMPLIFIER

March 1984

TOYOKAWA WORKS