Hitachi T 44 H Service Manual
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Extracted text from Hitachi T 44 H Service Manual (Ocr-read)
Page 1
@HITACHI
SERVICE MANUAL
No. 412 EGF
T-44H
T-44L
CONTENTS
KEY TO ILLUSTRATIONS ----------- 2
SPECIFICATIONS ------- 2,3
DISASSEMBLV ---------
DIAL CORD STRINGING -
ADJUSTMENTS .................... 3-12
INSPECTION OF MECHANISM 12,13
LUBRICATION ............... I .
BLOCK DAIGRAM ----
EXPLODED VIEW - - H '
PRINTED WIRING BOARD 1931.28.25
CIRCUIT DIAGRAM ---------- 20.22,24,26
REPLACEMENT PARTS LIST
............. 15 _ 18.21 _ 29
INHALT
LEGENDE FOR DIE ABBILDUNGEN
TABLE DES MATIEREs
SIGNATION DES COMMANDES -------- 2
CARACTERISTIOUES TECHNIQUES
TECHlecHE DATEN ..
ZERLEGUNG .........
ANonoNuNG DER SKALENSCMNUR
DEMONTAGE ........................ 6'7
ENROULEMENT DE LA FICELLE DE
on" .............................. -,
REGLAGE ..................
CONTROL: DU MECANISME
GRAISSAGE ................ .
SCHEMA ........................... 14
DARSTELLUNG VUE ECLATEE 15-13
PLAN DE BASE ------------ 1931.23.25
PLAN DE cuncurr ---------- 20.22.2435
TABLEAU nEs PIECE 154321-29
EINSTELLUNGEN ---------------- 8-12
INSPEKTION DES MECHANISMUS
...................... 12'13
SCHMIERUNG ------ 13.14
BLOCK SCHEMA ..................... 14
AUSEINANDERGEZOGENE ------- 15-13
PRINTPLATTEN ---------- 19.21.23.25
SCHALTPLAN ---------- 20.22.24.28
ERSATZTEILISTE -------- 15-18,21- 29
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
AM-FM STEREO DOUBLE CASSETTE RECORDER WITH SEMI-AUTOMATIC TURNTABLE
April 1984 TOYOKAWA WORKS
Page 2
HITACHI
T-44H/44L
KEY TO ILLUSTRATIONS
(D Power switch
® Graphic equalizer
CD Dial pointer (Stereo indicator)
(9 Balance control
@ Tuning control
(9 Function selector
® Volume control
® Tape counter/Reset button
© Continuance switch
{9 Record level control
(9 Microphone iacks
® Pause button
® Stop/Eject button
(13 Fast torward button ( DD )
(B Reiwnd button(« )
® Playback button ( p)
6) Record button
69 Power indicator
0} Level indicator
® Cassette holder
(9 Headphones jack
@ Transit screws
Q3 Speed selector lever
@ Stylus cover
® Tonearm
Q3 Arrn rest
0 Arm Iilter lever
{B Rest hook
LEGENDE FUR DIE ABBILDUNGEN
® Netzschalter
® Gralischer Entzerrer
® MW»/LW»Wahlscha|ter
(13 Rijckspultaste ( « )
® Wiedergabetaste ( b)
q) Autnahmetaste
(D Skalenzeiger(Stereoanzeige) ® Netzanzeige
(ED Balanceregler
Abstimmknopt
(D Funktionswahler
Lautstarkeregler
Q3 Pegelanzeige
Q) Kassettenhalter
® Kopthorerbuchse
@ Tonarm
® Bandzahlwerk/Riickstellkncpt ® Drehzahlwahlhebel
® Aulnahmeausteuerung
® Mikrolonbuchsen
® Pausetaste
@ Stop/Auswurttasle
0 Tonhohernregelknopl
® Armliithebel
(Z3 Armablage
® Nadelabdeckung
® Power switch
® Graphic equalizer
® MW/LW BAND selector
® Dial pointer (Stereo indicator)
© Balance control
© Tuning control
® Cunction selector
@' otume control
® Tape counter/Reset button
63 Record level control
0]) Microphone iacks
® Pause button
q; Stop/Eject button
0 Fast torward button ( » )
® Rewind button (« )
® Playback button (5)
0 Record button
{9 Power indicator
® Level indicator
Cassette holder
Headphones jack
© Tonearm
@ Speed selector
® Pitch control knob
® Arm litter lever
@ Arm rest
® Stylus cover
SIGNATION DES COMMANDES
® Interrupteur principal
® Egaliseur graphique
© Commutateur de bande
MO/GO
® Aiguille de cadran
(indicateur de stereo)
(5) Commande de balance
(9 Commande d'accord
(D Commutateur de tonction
® Controle de volume
® Compteur de bande/bouto
de remise
® Commande de niveau
® Touche d'avance rapide
( » )
® Touche de rembobinage
i« )
® Touche de lecture ( b)
0 Touche d'enregistrement
® lndicateur de secteur
® lndicateur de niveau
® Ports-cassette
@ Prise de casque
n 3 Bras acoustioue
® Commutateur de vitesse
G Commande de pas
® Schnellvorlaultaste ( DD )
denregistrement
® Prises de microphone
® Touche de pause
® Touche d'arrét/éiection
@ Levier de Ievage de bras
® Appui de bras
® Couvercle de stylel
SAFETY PRECAUTION
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 makers.
Critical parts are marked with A
in the circuit diagram and printed wiring board.
2. BeIore 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
GENERAL SPECIFICATIONS
Power Supply AC 120 V. 60 Hz
Power Consumptlon 65 W
Dimensions 32-5/8"(Hl X 17-1/8"(W) X 13-3/4(Dl
{83(H) x 43.5(W) x 35(0) cm]
Weight 42 lbs. (19 kg)
AMPLIFIER SECTION
Audio output 5 watts per channel. min. RMS. at
8 ohms trom 70 Hz 0 15 kHz, with
no more than 10% total harmonic
distortion.
100 Hz 3:8 dB
1 kHz 18 dB
10 kHz 1:8 dB
Tone Control
Input Soneltlvtty and
Impedance
Output Impedance
Microphone 3 mv, 1 kohms
Speaker: 8 ohms
Headphones : 8 ohms
TUNER SECTION
CIrcult System
Tunlng Range
FM/AM 2-band superheterodyne
FM : 88 to 108 MHz
AM 2530 to 1.605 kHz
IHF Sonoltlvlty FM 75 ohms, 2pV(17.2 dBt)
AM : 300 uV/rn (S/N 20 dB)
FM stereo Sspsrtstlon 30 dB
FM SlgneMo-Nolse Ratlo 60 dB
Antennas FM : Line cord or External
antenna
AM : Built-in territe-core antenna
TAPE DECK SECTION
Cassette tape deck
Cassette tape (0-30, 60. 90)
1»7/ (4.75 cm/s)
Taps Speed
Recordan System and
Bias Frequency
Track System
AC bias. 85 kHz
4 track 2 channel
Ereslng System AC erase
Frequency Response 100 Hz to 10 kHz
Slgnalvto-Nolu Ratio 45 dB
Wow and Flutter 0.3 % WRMs
Crosstalk 50 dB
Erase flatlo 60 (13
Motor DC Motor
_2_