Sony wm dd 30 service manual

Page 1

SERVICE MANUAL

Dolby noise reduction manulactured under license lrom Dolby

Laboratories Licensing Corporation.

'DOLBY' and the double- D symbol DD are trademarks oi

Dolby Laboratories Licensing Corporation.

AEP Model
UK Model

Model Name Ustng Similar Mechanism WM-DD

Tape Transport Mechanism Type MT-WMDD30-24

SPECIFICATIONS

Frequency response
40 - 15,000 Hz
Wow and llutter
: 0.13% (DIN)
0.03% WRMS (NAB)
Power output
Headphones:
10 mW + 10 mW (at 10% harmonic distortion)
load impedance 32 ohms
at DC operation
Outputs
Two HEADPHONES jacks (stereo miniiacks)
load impedance 8 - 300 ohms
Power requirements
3 V DC, two R6(size AA) batteries
DC IN 3 V iack accepts:
EDP-5003 battery case (optional) for use on
two R20 (size D) batteries
ACADQM AC power adaptor (optional) tor use
on 220 VAC, 50 Hz
DCC-7D car battery cord (optional) lor use with 12 V car battery
Battery Iile

Batteries Continuous playback hours
Sony batteries SUM-3(NS) Approx. 4
Sony alkaline batteries AM3 (N) Approx. 9
For maximum periormance we recommend the use ol alkaline
batteries.

Dimensions

Approx. 797 x 110 x 32.8 mm (w/h/d)
(31/4 x 43].; x 151.5 inches)
incl. projecting pans and controls
Weight
Approx. 290 g (10.3 oz) incl. batteries.
not incl, other accessories
Accessories supplied
Stereo headphones (1)
Carrying case (1)
Batterytube(1)

Design and specifications subject to change without notice.

Note
This appliance coniorms with EEC Directives 76I889 and 62/499 regarding
interlerence suppression.

Optional Accessories

AC power adaptor AGD2M
Battery case EDP-5003
Car battery cord D6070

Note: Ila car battery cord or an AC power adaptor not manufactured by
Sony is used, a fuse must be installed in the battery cord or the AC
power adaptor and the polarity oi the plug must be as illustrated,

3%»

FEATURES

. Disc Drlve system assures accurate and stable tape transport,
greatly reducing wow and flutter

- Dolby NR system reduces tape hiss noise.

0 Two HEADPHONES lacks allow two persons to listen to tape
playback together

0 The MEGA BASS selector for heavy and powerful Mega bass
sound

STEREn CASSETTE PLAYER
S ONY;

Page 2

WM - DD3O

Parts Identification

SECTION 1
GENERAL

E

\-

b

E

%

EEEE

Note:

EEEH

K\\\

I STOP button

4 PLAY button

« FF (fast forward) button

El HEW» (rewind) button

IE HEADPHONES jacks (stereo minijacks)
IE VOLUMEcontrol

BATTERY indicator

MEGA BASS selector

IE} DOLBY NR switch

TAPE selector

El Cassette holder

Battery compartment lid

OPEN button

DO IN 3 V (external power input) jack

MECHANICAL OPERATION in this set is the same
as that of model WM-DD, so refer to WM-DD serwce
manual previously issued for MECHANICAL OPERA-

TION.