Hitachi FT 1 Service Manual

Page 1

No. 370 EGF

FT-1
SERVICE MANUAL FT-1 L

@HITACHI

CONTENTS - INHALT' SOMMAIRE -'-fi
SPECIFICATIONS . TECHNISCHE DATEN A

CARACTERISTIOUES TECHNIQUES ------------------- 1.2
DIAL CORD SETTING - SKALENSEILEINSTELLUNG ,
EOUIPEMENT DE CADRAN ------------------------- 3

GENERAL ALIGNMENT INSTRUCTION ' ALLGEMEINE
AUSRICHTANLEITUNG - INSTRUCTIONS GENERALES 3
FM TUNER ALIGNMENT- ABGLEICH DES UKW-TUNERS-

Gm DE TUNER m .............................. 4
AM TUNER ALIGNMENT ABGLEICH DEs AM-TUNERs-
F111 REGUGE DE YUNER AM ............................... 5
DISASSEMBLY AND REPLACEMENT~ ZERLEGUNG UND
AUSTAUSCH ~ DEMONTAGE ET REMONTAGE AAAAAAAAAA 1
BLOCK DIAGRAM BLOCK SCHEMA SCHEMA --------- e
PRINTED WIRING BOARD » PRINTPLATTEN -
pm" DE BAsE ...................................... 9,11
CIRCUIT DIAGRAM - SCHALTPLAN ,
mm D: CIRCUIT ................................. 10,12
REPLACEMENT PARTS LIST ERSATZTEILLISTE -
TABLEAU DEs PIECE ------------------------ 13,14,15,ia

FRONT AND REAR PANEL' VORDERE UND HINTERE
BEDIENUNGSTAFEL4 PANNEAUX AVANT ET ARRIERE--17

SAFETY PRECAUTIONS

The following precautions should be observed when servicing.

14 Since many parts in the unit have special safety 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 safe to operate without danger of electrical shock.

SPECIFICATIONS
Circuitry AM/FM 27band Stereo tuner (FT-1) 0AM SECTION (FT-1)
MW/LW/FM 3-band stereo tuner (FT-1 L) Frequency range 530 , 1,605 kHz
OFM SECTION Sensitivity 36 [IV (DIN) ...S/N 26 dB
Frequency range 88 - 108 MHz 18 AV UHF) 250 pV/m
Usable Sensitivity 112 dB? UHF), l OpV (IHF Loop antenna)
(75 ohms DIN) Image interference
image interference ratio 40 dB
ratio 50 d8 (98 MHZ) Selectivity 40 dB
Total harmonic signal-to-noisa ratio 48 d8
distortion MONO: 0.3 %(1 kHz) Output voltage 165 mV (400 H130 % moculation)
STEREO ' 0,4 % (1 kHZl 0AM (MW) SECTION (FT-1L)
Signal-to-nolse ratio Mono. 75 dB (IHF) Frequency range 530 _ 1,605 kHz
65 (3 EC unwe'gmedi 099) Sensitivity 36 "v (DlN) ...S/N 26 dB
60 GB (| EC, weighted. Orpeak) Image Interference

STEREO 1 70 dB (IHF)

60 dB (iEC, unweighted, O~peakl 52:2le :3 g:
55 dB EC weighted Q-peaki Signal-to-noise ratio 48 d8
Frequmy "9 50 H1 2 Hz {50 5 i? E Output voltage 165 mv (400 Hz 30 % modulaticn
50 Hz- 15 kHz (50 us fggdB)
(ior W.Germany & lzaiyi W -W) SECTION in L)
50 Hz _12 kHz (75 #5 :2 dB) Frequency range 150 - 350 kHz
(tor USA. a Canada) Sensitivity 200 V (DlNl ..S/N 26 dB
Selectivity 50 dB OGENERAL
Stereo separation 40 dB (1 kHz) Power requirements DC Power supply irorn the amplilier
(except lor W. Germany & lialy) iHA-l or HA-2)
Capture ratio 10 dB Dimension: 435 (W) X 60(H) X 236(0) mm
Output voitago 550 mV (1 kHz) Weight 2.4 kg(5,3 lbs.)

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

AM/FM STEREO TUNER "

May 1983 TOYOKAWA WORKS