Sony wm ex 77 service manual

Page 1

WM-EX66 EX77 EX88

ERVICE MANUAL

AEP Model
E Model
Tour/st Model

WM-EX77/EX88
UK Model
WM-EX88
AEP Model
WM-EX66
Photo : WM-EX88
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MT-WMEX77-60

SPECIFICATIONS

Frequency response (DOLBY NR OFF)
ao-iwoo H: tsw ')

Output Earphones (n/REMOTE jock) load impednnci 5-3000
Pom-r output 5 mw + 5 mW at Dc operation (aw. ton)
Pwerrsquilomonls tsvoc

Reachnrgeable battery

One as (size AA) battery

DC In 15 v jack accoms (using the battery case):
Sony AC-EISL Ac power adaptor (not supplied) lor use on 100 V Ac (Use
in conjunction wltti lha supplied battery case)
Sony AC-ElsAL Ac power adaptorlnot supplied) lor use on 100-240 V Ac
(use in conjunction with the supplied battery case)
Bullery lile (EIAJ)

Note on the AC power adopter
Use only the Ac-EtsL Ac madammnot Iuppl'lsd) ln Joann or me AC-EISAL

AC power adaptor (not supplied) outsldo Japan. Do not use any other AC power nuaptor.

Polarity DI plug

Design and specifications subject to change without notice.

' (EINI Elwin: Indus1ries Mmiulon of Japan

Battery Pt-yu-ctt hours
Rechargeable NGGWM lully charged Approx 35 hours
Sony SUM»3(NS) Approx. 25 how:
Sony AMS (N) Approx. 9 hours
Rechargeable NGSWM with Sony AM3(N) Approx. 125 hours

For maximum pellet-manta we recommend Ihe use Of llkaline batteries.
Ballery life for the remote canlmllar : wwsxu only

Emory Uh
Silver oxide battery sattzasw Approx. 1 year

Dimensions Approx. 103.2 x 75.7 x245 mm(wlhld)(ElAJ)(WM-EX77lEX83l
Approx. toa.2 x 15.7 x25.4 mm(wlhld)lE|AJ)(WM-Exsal
incl. projecling parts and controls
Weigm Approx. 175 9 incl (WM-EX77/EXBB). 170 g incl (WM-Exes). rechargeab

no! Incl. other accessories

Battery case (1) Sony alkaline battery AM3 (N) (I)

Silvaroxioe battarym :WM-EX88 only

Racnllgoable bounty (t)

Ballory charger (1), Ac plug tiaaplor (l)

Slaloo earphones (1), Ear adaplorl (2) (ll the earphones do not lit your ears.
attach the ear adaptors.) Plug adaptor (1), Remote control unil (I)

Carrying case (1)

Accessories supplied

[e battery,

CASSETTE PLAYER
S 0 NY;

Page 2

WM-EX66/EX77/EX88

TABLE OF CONTENTS
Section Title Page
Specification .............................................................. 1
1. GENERAL

1-1.

l-l. Location and Function of Controls -------------

SERVICING NOTE-~~

ADJUSTMENTS
3-1. Mechanical Adjustment -
3-2. Electrical Adjustment

DIAGRAMS
4-1. Block Diagram ---------
42. Printed Wiring Boards- -
4.3 Schematic Diagram .......................................... 11
4-4. Remote Control Printing Wiring Board and

Schematic Diagram .......................................... 16

EXPLODED VIEWS

5-1. Cabinet Section
5-2. Mechanism Section -
5~3. Mechanism Section(MT-WMEX77-60

ELECTRICAL PARTS LIST -------------------------------- 21

SECTION 1
GENERAL

LOCATION AND FUNCTION OF CONTROLS
WM-EXGB

SIDE NB (tape playback sldol
buttery) indicator

E} 4 >(pluybnoldtnpo tmnlpon dlroo-
lion chong.) button

I (flop) button

Flexible Circuit B ard Repairing

Keep the temperature of the soldering iron around
270°C during repairing.
Do not touch the soldering iron on the same conduc-
tor of the circuit board (within 3 times).

0 Be careful not to apply force on the conductor when
soldering or unsoldeting.

Notes on chip component replacement

0 Never reuse a disconnected chip component.
0 Notice that the minus side of a tantalum capacitor
may be damaged by heat.

This section is extracted from
instruction manual.

EX DEB (dynamlc ban boost)
selector

VOL (volume) control

Arv~Los (-utorn-tic volum. llrnltor lynem)
leteh

El FF (lust-tomord) (ms button
new (rowlndl [ms button

HOLD dial

Battery oomportrnont Ild (lor a
nonsrgublo battery)

Buttery oonnootlng point: (vortno
supplied battery one)

open switch

canons holder

Window

a o a MODE (up. lranIport)
ulector

[1] (Dolby) NR (Dolby noloo
reduction) ON/DFF Ielector

Q MEMOTE (earphonts with romoto
control unlt) luck

ll you wish to use separately bought
earphones, use the supplied plug adaptor.

E E @EHE fl REE]

HEEIEEEIHEBE EH E

I mop) button
new lrowlnd) (AMS button
FF (Ian-lorwardl (AMS button

4 >(playblck/tapo transport direc-
tion ohungol button

Micro plug

Nine-pols plug

VOL (volume) control
HOLD swllch

HOLD indicator