Sony WM-DDIII Service Manual

WM-Dul
SERVICE MANUAL
HEADPHONES jacks (stereo minijacks)-
REW ►► (rewind) button'
<*4 FF (fast forward) button
<4 PLAY button
■ STOP button
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol □□ are trademarks of
Dolby Laboratories Licensing Corporation.
Refer t MDR-15L Service Manual issued previously
for informati n of headphones supplied with this set.
AEP Model
VOLUME control
BATTERY indicator
DOLBY NR switch
-TAPE selector
PHOTO: BLACK TYPE
SPECIFICATIONS
Similar Mechanism Set
WM-DD
Tape Transport Mechanism Type
DD-tOO
Tape track
4-track 2-channel stereo
Fast winding time
Approx. 2 min. with Sony Cassette C-60
Frequency response
40-15,000 Hz
Wow and flutter
±0.13% (DIN)
0.08% WRMS (NAB)
Power output
Headphones:
20mW + 20mW {at 10% harmonic distortion)
load impedance 32 ohms
at DC operation
Outputs
Two HEADPHONES jacks (stereo minijacks)
load impedance 8-300 ohms
Power requirements
3 V DC, two R6 (size AA) batteries
DC IN 3 V jack accepts:
EBP-500 battery case (optional) for use on
two R20 (size D) batteries
AC-D2M AC power adaptor (optional) for use
on 220 V AC, 50 Hz
DCC-70 or DCC-127A car battery cord (optional) for use with 12 V
car battery
(For connection with the DCC-127A, the optional PC-200 DC plug
adaptor is required.)
Battery life
Batteries Continuous playback hours
Sony batteries SUM-3 (NS)
Approx. 4
Sony alkaline batteries AM3
Approx. 9
For maximum performance we recommend the use of alkaline
batteries.
Dimensions
Approx. 79.7x110x32.8mm (w/h/d)
(3V4x4%x
1
s/16 inches)
incl. projecting parts and controls
Weight
Approx. 290 g (10.3 oz) incl. batteries,
not incl. other accessories
Note: If a 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 of the plug must be as illustrated.
FEATURES
• Disc Drive system assures accurate and stable tape trans¬
port, greatly reducing wow and flutter.
• Dolby NR system reduces tape hiss noise.
• Tape selector for optimum playback with standard tapes
as well as high-performance tapes.
• Two HEADPHONES jacks allow two persons to listen to
tape playback together.
STEREO CASSETTE PLAYER