Hitachi MXW 50 Service Manual

Page 1

(:0) H ITAC H I TY No. 571EF-1

SERVICE MANUAL (us,c9g3§;g§sgs,sm

SUPPLEMENT

CONTENTS -_-¥ TABLE DES MATIEFIES -A~
2 ENTRETIEN .. .. .

PLAN DE BASE

PLAN DE CIRCUIT

.19 SCHEMA DE CABLAGE

MAINTENANCE
PRINTED WIRING BOARD . ... 3M-8
CIRCUIT DIAGRAM

WIRING DIAGRAM
DIFFRENCE FOR DESTINATION.
REPLACEMENT PARTS LIST ......

DIFERENCE EN FONCTION DU PAYS DE DESTINATION .
TABLEAU DES PIECES .......................................... . ,,,,,,

In this unit, a printed wiring board has been changed for operability and performance improvement purposes. This
Service Manual contains the PWB, circuit and wiring diagrams after the modification. Use it together with the already
released MX-W50 Service Manual (TY No. 571EF). The table below shows the serial Nos. from which the modification
was introduced.

Color Serial No.
I BLACK from 006381
WHITE from 001731

The HTV-3302DH/3602DH mechanism is a partially modified version of the HTY-33OODH/3GOODH mechanism.

I Dans cet appareil, une plaquette de circuit imprimé a été modifiée dans le but de faciliter Iutilisation et d'améliorer les
performances. Les sohémas de ce manuel d'entretien concernant les PCI, circuits et cablages tiennent compte de
cette modification. Ce manuel doit étre utilisé coniointement avec le manuel d'entretien MX-W50 (TY No. 571EF) déja
publié. Le tableau cidessous indique les numéros de série affectés par la modification.

Couleur No. de série
NOIR a partir de 006381
BLANC a partir de 001731

Le mécanisme HTY-33DZDH/3GOZDH est une version partiellement modifiée du mécanisme HTY-33DODH/3600DH.

' SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

iTEREO CASSETTE RECEIVER/COMPACT DISC PLAYER I
November 1987 YOKOHAMA WORKS I

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MX

SAFETY PRECAUTIONS

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 pans. Especially critical pans 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.

MAINTENANCE

I Clean cabinet and panels when dirty

Clean off dirt on the surfaces with a dry cloth. Never use
thinners, benzene or alcohol since these will damage the
surface finish.

PRECAUTIONS DE SECURITE

Les precautions suivantes doivent etre observées cheque fois quune reparation doit etre faite.

l. Etant donné que de nombreux composants de lappareil possedent des caractéristiques relatives a la sécurité,
utiliser uniquement des pieces de rechange dcrigine Hitachi pour effectuer un remplacement. Ceci se rapporte
notamment aux pieces critiques du bloc d'alimentation qui ne doivent en aucun cas etre 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 l'appareil répare au client le technicien doit procéder a un essai complet pour s'assurer qu'il

ne présente aucun danger de chocs électriques,

EN TFiE TIEN

I Nettoyage du coffret et des panneaux Iorsqu'ils sont
sales

Enlever la poussiére des surfaces de l'appareil avec un

chiffon sec. Ne iamais utiliser de solvents, de benzine ou

dalcool car ils abimeraient Ie fini des surfaces,

Check that exposed parts are acceptably insulated
from the supply circuit before returning the instru-

ment repaired to the customer. INSTRUMENT

0 Checking method
Power switch is set to ON. (Exposed part)
Next, measure the resistance value between the
both poles of attachment cup (Power supply plug) \

and the exposed parts (Parts such as Knob. Cover,
etc. where the customer is easy to touch.) and
check that the resistance value is 500 kohms or
more.

-00-

Insulation tester (DC 500V)

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MX-W50

>Z< : Condensateur ceramique a conducteur axial.

>.< : Axial lead cylindrical ceramic capacitor

901 LASER DIODE

2 TRACKING SERVO

OUTPUT ADJ.

OFFSET ADJ.

To TS P.W.B. a

Page 86

MX-W50

SYMBOL

PART

SYMBOL

PART

SYMBOL

PART

No. No. DESCRIPTION Nu No. DESCRIPTION No. No. DESCRIPTION
CABINET CHASSIS 3308944 CD control button (BLACK) 39 4567411 DT bind scraw139s x 6)
[tor US, CS] (heat sink bracket)
1 8691410 BT bind head screw (fit5 it 10) 3308947 00 control button (WHITE) 40 8601414 BT bind head screw (39S x 14)
(bottom case, main P.W.B., [except US, CS] (0801, 0804, (1806)
others) 3308945 CD control button (BLACK) 41 8691408 BT bind head screw (34 x 8)
2 8691425 8T bind head screw (3 <4 x 25) [except US, CS] (shield sheet)
(bottom case) 17 3308937 Cassette control button 42 4573553 Bind tapping screw (313x 25)
3 4044641 Upper case assy (BLACK) (WHITE) (16701)
4044451 Upper case assy (WHITE) 3308934 Cassette control button 43 3907811 Washer
4 392128 CD door open spring ()1) (BLACK) [for E8, BK]
5 3392127 C0 door open spring (L)
6 3392129 Cassette door open spring (L) 18 3308911 Tuner button 44 2137381 Line filter (ESD-BZED)
19 3392153 CD open wire [for E8. VS, BK, KS, SA, ZS]
7 3392120 Cassette door open spring (R) 20 3392143 Cassette open wire
8 3807092 Control panel 21 3306901 Push button UNIT MECHANISM
[WHITE] (BLACK (except BK)] 22 3308921 Volume knob
3807093 Control pane) 23 4567422 DT bind head screw (4 9 x 8) 1 4468942 Unit plate assy
[BLACK (for BK)] (power transformer) 2 4040622 DC motor assv
9 3807191 Side panel 24 8699410 BT bind head screw (374 x 10) 3 4418005 PS washer
10 3805331 Clamper (cassette chassis) 4 3976432 Send gear
11 3807262 CD lamp cover 25 4594961 Frote screw 5 4850631 DC motor kit assy
12 3908591 Damper (unit mechaa) 6 8711103 Pan head screw (2 d x 3)
13 3807131 Cassette door assv 7 2780071 Micro switch
26 4567432 0T bind head screw (3 A x 8)
14 3807141 CD door assy (voltage select switch) for ACCESSORIES
15 4044491 Bottom case assv (WHITE) [tor EW]
[(or ES] 27 8699309 BT bind head screw (2.64 x 9) A 2667922 Siemens plug
4044492 Bottom case assv (WHITE) (DIN antenna socket) [for EW]
[lur V8] [for ZS] 2757528 FM antenna
4044493 Bottom case assv (WHITE) 28 2589341 HTV736000H cassette mocha (except ZS)
[for BK) assv (TAPE 2) 4023261 AM loop antenna assv
4044494 Bottom case assv (WHITE) 29 2789693 Counter 2589364 Remote control unit (BB-W50)
[for KS) 30 4686999 Counter belt [for US, cs]
4044495 Bottom case assv (WHITE) 2569365 Remote control unit (BB-W50)
[for Z3) 31 2580342 HTY-33000H cassette mecha [except US, 08]
assy (TAPE 1) 4849091 Battery cover
4044496 Bottom case assy (WHITE) 32 8699414 BT bind head screw (3 ¢ x 14)
[for SA] A33 2267392 Power transformer CASSETTE CHASSIS
4044497 Bottom case assv (WHITE) (24 kg 119.4 VA)
[for US) [for E5, VS, KS, ZS] 1 4846531 Real (LI assy
4044498 Bottom case assy (WHITE) A 2267393 Power transformer 2 4847531 Reel (R) assy
[(or CS] (2.4 kg 119.4 VA) 3 4846831 Mechanism base assv
4044499 Bottom case assy (WHITE) [(or BK. SA] 4 4846451 FR arm assy
[lor EW] A 2267391 Power transformer (2.4 kg 119.4 VA) 5 4846001 FR gear
4044471 Bottom case assv (BLACK) [for US, CS) 6 4846031 FR arm A spring
[for ES] 7 4846231 FR arm B spring
A 2267394 Power transformer 8 4846061 REW gear
4044472 Bottom case assy (BLACK) (2.4 kg 119.4 VA) 9 4846601 Trigger arm (FR-B)
[for VS) [for EW] 10 4846991 FR cam gear
4044473 Bottom case assy (BLACK) A34 2712101 Power supply cord
[for BK] [for E6. VS, KS, ZS] 11 4854061 Washer
4044474 Bottom case assy (BLACK) A 2749582 Power supply cord 12 4853601 Reel spring
[for KS] [for BK) 13 4846631 Reel cap
4044475 Bottom case assy (BLACK) A 2749622 Power supply cord 14 4816011 Washer
[for ZS] [for SA) 15 4853641 Brake arm
4044476 Bottom case assy (BLACK) A 2712311 Power supply cord 16 4846021 Brake spring
[for SA] 17 4946522 Clutch assv
[for US, CS] 18 4846801 FR lever
4044477 Bottom case assy (BLACK) A 2718113 Power supply cord 19 4851801 FR lever spring (6)
[for US] [for EW] 20 4847771 RV lever collar
4044478 Bottom case assy (BLACK) A35 3913006 Bushing
(tor CS] [except EW] 21 8691106 BT bind head screw (24 x 6)
4044479 Bottom case assy (BLACK) A 0043793 Bushing 22 4846501 RV lever assy (A)
[for EW] [for EW] 23 4846571 FR shift arm
16 3308946 CD Control button (WHITE) 36 4042682 Unit mecha assv (CD-M12) 24 4845671 Select arm
[for U3, CS) 37 4691991 Rubber 25 4845901 FR shift spring
38 8671406 DT bind head screw (11¢ x 6) 26 4847001 PL cam gear

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