Hitachi TRKW 350 Service Manual

This is the 35 pages manual for Hitachi TRKW 350 Service Manual.
Read or download the pdf for free. If you want to contribute, please upload pdfs to audioservicemanuals.wetransfer.com.

Page: 1 / 35
Hitachi TRKW 350 Service Manual

Extracted text from Hitachi TRKW 350 Service Manual (Ocr-read)


Page 1

i§i HITACHI

SERVICE MANUAL

CONTENTS

SPECIFICATIONS I .. 1
DISASSEMBLY N 3
DIALCORD STRINGING 5
ADJUSTMENT 6
LUBRICATION . 10
MAINTENANCE , 10

PRINTED WIRING BOARD
CIRCUIT DIAGRAM
WIRING DIAGRAM
BLOCK DIAGRAM ..
EXPLODED VIEW
(Cabinet) ....
(Cassette chassis TRK-W330l .
(Cassette chassis TRK-W350l .
\REPLACEMENT PARTS LIST .........

TY No. 577 EF

TRK-W33O [HQ 5. w, AU]
TRK-W350 [E Hc, E035), w,

wiuu), wiuusl, AU

1

TRK-W350

CARACTERISTlQUES TECHNIQUES
DEMONTAGE ......................
CHEMlNEMENT DU GORDON DACCORD
REGLAGE
LUBIFICATION

ENTRETIEN

PLAN DE BASE
PLAN DE CIRCUIT .....
SCHEMA DE CABLAGE
SCHEMA .....
VUE EXPLOSEE
(Coflret)
(Chassis de Cassette TRK-W330l
(Chassis de Cassette TRK-WSSOI
TABLEAU DES PIECES ................

TABLE DES MATIERES-fi
2


r SAFETY PRECAUTION

The following precautions should be observed when

servicing.

1. Since many parts in the unit have special safety-related characteristics, always use genuine Hitachi
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.

SPEC/FICA TIONS
O RADIO SECTION
circuit System: FM/AM-Zhands superheterodyne

[for H, HC]

FM/SW/MW/LW-4bands superheterodyne
[for E, E(BSII

FM/SWZ/SWI/MW-4bands
superheterodyne [for W, WIUN), WiUNSl,
AUI

FM: 88 to 108 MHz [except E, EIBSH

FM: 57.5w 108 MHz [for E, E(BS)]

SW: 6m 18 MHz [for E, EIBSII

Tuning Range:

Sensitivity:

SW2: 7m 22 MHZ [forW, W(UN),W(UNS),

AU]

SW1 : 2.3 to 7 MHZ [IorW, WIUNI, WIUNSIv

AUI
MWiAM): 530 to 14605 kHz
LW: 150 to 285 kHz [for E, EIBSI]
Intermediate
Frequency: FM: 10.7 MHz
SW/MW/LW: 468 kHz Ifor E, EIBSH

SWZISW1IMW(AMl: 455 kHz [except E, El

Antennas:
(Aerials)

BSII

FM: 15dB (prsJ
10 dB (max)
sw: 34 dB (pra.) [for E, ElBSlI
22 dB Imax.) [for E, EIBSI]
SW2: 38 dB (pm) [for W, W(UN), WIUNSI,
AU]
28 dB (max) liorW, W(UNl, W(UNS),
AU]
:50 dB Ipra.l [for W, WIUN). WIUNSI.
AU]
40 dB Imax.) IforW. W(UN), W(UNS),
AUI
MWIAM): 50 dB (Na)
40 dB lmaxJ
LW: 55 dB (DraJ [for E, EIBSH
46dB (max) [forE, EIBSII
FMISW/SWZ: RODt antenna
SWIIMWIAMllLW: Built in ferrite antenna

SW1

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

RADIO CASSETTE TAPE RECORDER

rm

October 1987

YOKOHAMA WORKS

Page 2

I nr\ aov
TRK-W350
O TAPE RECORDER SECTION
Tape: Cassette tape
Track System: 4tracks Zchannels stereo
Tape Speed: 4.75 cm/sec,
Recording System: AC bias (TAPEZI
Erasing System: Magnet erase (TAPEZI
Erasing Ratio: 50 dB
Frequency Response: Normal: 60 to 10,000 Hz
Signal to Noize Ratio: 40 dB

Wow and Flutter:
Cross Talk:

Input sensitivity and
impedance:

Output med
impedance:
Distortion:

Motor:

Head:

0.25% (WRMS)
Between tracks: 60 dB
Between channe|5140 dB

CD/Linerin: 700 mV, 40 k0

Headphones: Etc 100 n
3%

DC micro motor
Permelloy

Specifications are subject to change without notice for performance improve-

ment

PRECAUTIONS DE SECURITE

I GENERAL SECTION

Semiconductors:

Power Supply:

Power Consumption:
Power Output:

Speakers:
Dimensions:
Weight:

ICs: 4

Transistors: 15 [except E, EIBSII
16 [for EIBSH
17 [for E]

Diodes: 7 [for H, HC]
9 [except H, HCI

LEDs: 2

AC: 20V, 60 Hz [for H, HC]

AC: 220V, 50 Hz [for El

AC: 240V, 50 Hz [for EIBS), AU]

AC: 110*127V/200 * 220V/230 " 250V,
50/60 Hz [forW, WiUN), WIUNSH

DC: 9V [IEC R20 ID" CELL) x 5 or equivalent]

Car: Use car-battery adaptor [for W, WIUNI,
WKUNSH

14W

20W P.M.P. (AC operation)

ZWICH (10% T.H.D, DC operation)

100m (x 2)

512 (W) X 162 (H) x 194(0) mm

3.7 kg (with batteries)

Les precautions suivantes doivent étre observées chaque fois qu'une reparation doit étre faite.

1. Etant donné que de nombreux composants de l'appareil possédent des caractéristiques relatives 5 la sécurité,
utiliser uniquement des pieces de rechange dorigine Hitachi pour effectuer un remplacement. Ceci se rapporte
notamment aux pieces critiques du bloc d'alimentation qui ne doivent en aucun cas étre remplacées par celles
dautres fabricants. Les pieces critiques sont accompagnés du symbole A dans le plan de circuit at sur le plan

de base.

2. Avant de retourner I'appareil répare au client le technicien doit procéder a un essai complet pour sassurer quil
ne présente aucun danger de chocs électriques.

CARACTERISTIOUES TECHNIQUES

0 SECTION RADIO

Systime de circuit:

Gimmes dacmrd:

Frequenee intermediaire:

Sensibilite:

2 gammes d'ondes FM/AM
a superhetérodyne [pour H, HC]
4 gammes dondes FM/OC/PO/GO
a superhétérodyne [pour E, EIBS)!
4 gammes dondes FM/OCZOCI/PO
a superhétérodyne IpourW, WlUNl, WIUNSl,
AUI
FM: De 88 a 108 MHz [sauf E, EIBSII
FM: De 87,5 3108 MHz [pour E, ElBSH
OC: De 6 $13 MHz [pour E, EIBSH
002: De 7 a 22 MHZ [pourW, WIUN).
WIUNS). AUI
0C1: De 2,3 5 7 MHz [pourW, WIUNI.
WKUNSI, AU]
PD(AM): De 530 B 1605 kHz
G0: De 150 a 285 kHz [pour E, E(BSl]
FM: 10.7 MHz
OCIFO/GO: 468 kHz [pour E, E(ES)I
OC2/0C1IPOIAMI1455 kHI [sauf E, E(55)]
FM: 15 dB IutiIeI
10 (13 (max)
0C: 34 dB lutiIB) Ipour E, EIBSII
22 (:18 (man) [pour E, 5135)]
0C2: 38 (13 (mils) [Pour H, HC, W, W(UN),
WIUNS). AU]
28 dB Imax.) [pour H, HC, W, WIUN),
WIUNSI, AUI

Antennes:
Ieérienil

0C1150 dB (utiIeI [pour H, HC, W, WIUN),
WIUNSI. AU]
40 dB (mam) [pour H, HC, W, WIUN),
wlUNs). AUI
POIAM): 50 dB (utile)
40 dB Imax.)
GO: 55 dB lutile) [pour E, E(BS)]

46 dB (maxtl [pour E, E(BS)]
FM/OC/OCZ: antenne tige (aérien)
OCI/PO(AM)IGO: antenna en ferrite

incorporee (aérien)

OSECTION LECTEUR-ENREGISTREUR DE CASSETTE

Bende:
Systéme do piste:
Vitesse de défilement:

Systeme d'enregiatrement:

Systéme d'efteoement:
Taux defiacement:
Réponse en frequenne:
Rapport signal-bruit:

Pleurege et scintillemenrt:

Diaphonie:

Impedance et sensi lité
d'entrée:

_2_

En cassette

4 pistes, Z canaux stéréo
4,75 cmls

Polarisation c.a. (TAPEZ)
Aimant (TAPEZ)

50 dB

Normal: De 60 a 10000 Hz
40 dB

0,25% (watts effic.)
Entre les pistes: 60 dB
Entre les canaux: 40 dB

CD/entrée Iigne: 700 mV, 40 k0