Hitachi J2 Servicesanleitung

@HITACHI
SERVICE
SAFETY
The following precautions should be observed when servicing.
I. Since many parts in the unit have special safety-related characteristics, always use genuine Hitachi's replacement parts. Especially
critical parts in the power
Critical parts are marked with
2. Before returning a repaired unit-to the customer, the service technician must thoroughly test the unit to ascertain that it is com-
pletely safe to operate without
CAUTION
FOR CONTINUED
ONLY WITH SAME
WITH THE FUSE SYMBOL
The following is indication
jacent to the fuse in the equipment.
Example
SPECIFICATIONS
FT-J2 (FM/SW/MW
GENERAL SPECIFICATIONS
Semi-conductors
Dimensions
Weight
TUNER SECTION
Circuit system
Frequency range
Sensitivity
SPECIFICATIONS
STEREO TUNER/STEREO
MANUAL
PRECAUTIONS
circuit block should
in the schematic
danger of electrical
FOR CANADA
AGAINST FUSE REPLACEMENT
PROTECTION AGAINST FIRE HAZARD.
TYPE AND SAME RATING FUSE IN ACCORDANCE
LABEL.
of the fuse symbol label which
This symbol indicates Slow Operating
Type 2 A. 125 V Fuse.
STEREO TUNER)
IC's: 7
Transistors: 23
FET: 2
LED's: 8
Diodes: 11
74 (H) x 230 (VV) x 198 (D) mm
1.8 kg
FM/ SW/ MW 3 band superheterodyne
FM: 87.5 - 108 MHz
SW: 3.8 12 MHz
MW: 530 - 1,605 kHz
FM: 1.9 pv (S/N 30 dB 400 Hz, 75 kHz
Dev. )
SW: 25 gv
(S/N 20 dB, 400 Hz
MW: 15
(S/N 20 dB, 400 Hz
AND PARTS ARE
April 1981
TY
CONTENTS
SPECIFICATIONS
DISASSEMBLY
DIAL CORD
ADJUSTMENT
CIRCUIT
PRINTED
BLOCK DIAGRAM
REPLACEMENT
KEY TO ILLUSTRATIONS
not be replaced with other makers.
diagram and circuit board diagram.
shock.
ATTENTION
AFIN D'ASSURE
REPLACE
QUES D'INCENDIE.
MEME TYPE
is affixed ad- DU SYMBOLE
La indication
dans rappareil.
Example
FM capture
FM selectivity
FM Harmonic
FM stereo separation
FM Pilot suppression
AM suppression
Image rejection
Intermediate
Antennas (Aerials)
FM frequency
S/ N (Signal
mod.)
Ratio)
mod.)
SUBJECT TO CHANGE
AMPLIFIER
TOYOKAWA
No. 259
FT-J2
HA-J2
..... ..... ..... ......
STRINGING
DIAGRAM ......................
WIRING BOARD
PARTS LIST .
.
POUR LE CANADA
CONTRE LE REMPLACEMENT
UNE PROTECTION PERMANENTE
REMPLACER UNIQUEMENT PAR
ET MEME PUISSANCE EN ACCORD AVEC
DE CHAQUE FUSIBLE.
qui suit est portée sur l'étiquette de chaque fusible
Ce symbole signifie qu•il s•agit d'un fusi-
ble fusion retardée de 2 A. 125 V.
t-2SV
2 dB (1 mv, 75 kHz Dev.)
ratio
60 dB (±400 kHz)
0.3/0.60/0 (1 rnv,
distortion
MONO/STEREO)
40 dB
35/50 dB (19 kHz/38
40 dB (1 mv, FM 75 kHz Dev.,
AM30% mod.)
45 dB
frequency FM: 10.7 MHz
MW/SW: 455 kHz
FM: External antenna
300 ohms/ 75 ohms
SW: External antenna
MW: Loop antenna
antenna (aerial)
20 - 15 kHz (±1.5
response
to Noise
FM mono: 65 dB
FM stereo: 60 dB
MW/SW: 50 dB
FOR IMPROVEMENT.
WORKS
EGF
for U.S.A., Canada,
Asia & Latin
American countries,
etc.
.6
13, 16
. 14, 17
18
20
.. 25
DE FUSIBLE
CONTRE LES RIS-
UN FUSIBLE DE
LE TIQUETTE
intégré
1,000 Hz,
kHz)
(aerial)
(arerial) or External
dB)