Sony Walkman WM-D6C User manual

STEREO CASSETTE-CORDER
M-D6C
OPERATING
INSTRUCTIONS
Please
read
this
operating
manual
thoroughly
before
operating
this
high
quality
electronic
unit,
so
that
you
can
obtain
the
maximum
en-
joyment
from
it.
This
manual
should
be
retained
for
future
ref-
erence
and
used
to
answer
your
operational
questions
as
they
arise.
UJ
(0)
L
K
an
(-)
‘@
PROFESSIONAL
WALKMAN
is
a
trademark
of
Sony
Corporation
© 1983 by Sony Corporation

OWNER’S RECORD
The model number is located at the rear and:
the serial number is located in the battery
compartment.
Record the serial number in the space pro-
vided below.
Refer to these numbers whenever you call
upon your Sony dealer regarding this
product.
Mode! No. WM-D6C
Serial No.
INFORMATION
This equipment has been tested and found to
comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable
protection against harmful interference in a
residential installation. This equipment
generates, uses, and can radiate radio frequency
energy and, if not-installed and used in
accordance with the instructions, may cause
harmful interference to radio communications.
However, there is no guarantee that interference
will not occur in a particular installation. If this
equipment does cause harmful interference to
radio or television reception, which can be
determined by turning the equipment off and on,
the user is encouraged to try to correct the
interference by one or more of the following
measures:
¢ Reorient or relocate the receiving antenna.
* Increase the separation between the
equipment and receiver.
¢« Connect the equipment into an outlet on a
circuit different from that to which the receiver
is connected.
¢ Consult the dealer or an experienced radio/TV
technician for help.
Warning :
You are cautioned that any changes or
modifications not expressly approved in this
manual could void your authority to operate this
equipment.
TABLE OF CONTENTS
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PFECAULIONS ivoiscncets cove oevaeaucavoreconis 3
Battery insertion ............. cc cece cece eee eee eee 4
Cassette insertion .........c ccc ceseeeeenee eres 5
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RECOIGING cficcrvaaticnuudareionteassan doce vans 8
Other power SOUICES ...... ccc cece cece ees 9
Functions to make recording/playback
COSY eee ee here ata eeteutilien senses 10
How to use the carrying case and
SNOUIGEr SUBD + i. encis eran canted ot det enees 14
Maintenance 2... ccccc cece cece eee seenes 12
SPECIICANONS s.c.ueciirniars aie miraaaadecdstes: 12
Parts identification ......... 0. cece cee ee eee e es 14

FEATURES
@ Quartz lock capstan servo system assures
accurate and stable tape speed.
@ in addition to the conventional B-type
Dolby * NR system, the WM-D6C employs the
C-type Dolby NR system which reduces tape
noise twice as effectively as the B-type
system.
@ Speed control adjusts the tape speed
accurately (approx. +4%) in the playback
mode.
e@ DC-DC converter boosts the low voltage of
DC 6V and maintains sufficient power.
@ Amorphous head for recording/playback
provides a wider dynamic range and a more
extended frequency response.
@ Tape selector for optimum recording with
standard tapes as well as high-performance
tapes.
@ Microphone attenuator eliminates the dis-
tortion which may be caused by high-level
input signal.
e MIC (PLUG IN POWER) jack can supply
power to an ECM-909A electret condenser
stereo microphone (optional).
e Three different power sources: batteries,
house current, and 12 V car battery.
@ 5-LED peak/battery indicator shows both
the peak levei and the battery strength.
® Stereo minijacks can be used for connect-
ing to audio components.
* Dolby noise reduction manufactured under ficense from Dolby
Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol O00 are trademarks of Dolby
Laboratories Licensing Corporation.
PRECAUTIONS
® Operate the set only on 6V dc.
@® Do not leave the set near heat sources
such as radiators or airducts, or in a place
subject to direct sunlight, excessive dust,
moisture, rain, or mechanical shock.
@
Should
any
liquid
or
solid
object
fall
into
the
set,
remove
the
batteries
and
disconnect
the
ac
power
adaptor
or
the
car
battery
cord,
and
have
the
set
checked
by
qualified
person-
nel
before
operating
it
any
further.
On headphones
Road safety
Do not use headphones while driving,
cycling, or operating any motorized vehicle. It
may create a traffic hazard and is illegal in
some areas. It can also be potentially
dangerous to play your headsets at high
volume while walking, especially at
pedestrian crossings.
You should exercise extreme caution or
discontinue use in potentilally hazardous
situations.
Preventing hearing damage
Do not use headphones at high volume.
Hearing experts advise against continuous,
loud and extended play. If you experience a
ringing in your ears, reduce volume or
discontinue use.
Caring for others
Keep the volume at a moderate level. This
will allow you to hear outside sounds and to
be considerate to the people around you.
@ The record button cannot be depressed in
the following cases. Never depress the but-
ton forcibly.
¢ No cassette in the cassette compartment.
¢ The cassette inserted has had the tabs
removed.
If you have any question or problem concern-
ing your set that is not covered in this man-
ual, please consult the nearest Sony Service
Station authorized to service tape recorders.

-
BATTERY INSERTION
Insert four batteries, size AA (IEC designation
R6), with correct polarity, referring to the
illustration below.
orange dot
Note: When the set is not to be used fora
long period of time or is to be operated exten-
sively on other power sources, remove the
batteries to avoid set damage caused by bat-
tery leakage and corrosion.
continuous
continuous recording playback
TYPE IV | TYPE! | TYPE1,IV
batteries
Sony AM3 (N)
alkaline batteries
Sony SUM-3 (NS)
batteries
(hours)
an life
type a cassette
ay
To check the battery condition, press any of
the function buttons and set the peak/battery
indication selector to BATT. The bottom-
most LED will glow showing battery condi-
tion. If the indicator glows faintly replace all
batteries at once.
@ The life of other type batteries or batteries
of other manufacturers may be different.

CASSETTE INSERTION
Take up any slack in the tape with a thick
pencil, and insert a cassette with the desired
side up. Avoid touching the tape surface.
Ln

PLAYBACK
CONNECTION
For playb. h
For
playback
through
the
headphones
|
playback
through
speakers
Amplifier
stereo headphones
equipped with stereo*-
miniplug
(supplied)
ed
R
L
to TAPE or
AUX
red plug: to white plug: to
right
channel
left
channel
to HEADPHONES
|
|
| supplied connecting cord
|
|
OPERATION
1
y)
3
scat acpntaesnad % peak/battery indication
selector ~ to PEAK
1
Insert
a
cassette.
5
Adjust
the
volume
of
the
headphones
with
2
Set
the
TAPE
selector
to
the
appropriate
the
HEADPHONE
VOLUME
control.
position.
Adjust
the
volume
of
the
speakers
with
3
For
Dolby
B-type
NR
processed
tape,
set
the
volume
control
of
the
amplifier.
the DOLBY NR selector to B-TYPE.
For
Dolby
C-type
NR
processed
tape,
set
it
To
stop
the
tape
during
playback,
press
the
to
C-TYPE.
“8
button.
For
non-Dolby
NR
processed
tape,
set
it
to
To
rewind
the
tape,
press
the
<4
REVIEW
OFF.
button.
4
Depress
the
®
PLAY
button.
Playback
will
To
advance
the
tape
rapidly,
press
the
DR
begin.
CUE
button.

SPEED TUNE SELECTOR AND CONTROL
The playback speed can be adjusted to tune
the pitch of a tape, recorded on another tape
recorder. Set the SPEED TUNE selector to ON
and turn the SPEED TUNE cofftrol to F (fast)
or S (slow). For normal tape speed, set it to
OFF.
When the @ RECORD button is pressed, this
selector is automatically set to the OFF posi-
tion.
TO DUPLICATE ONTO ANOTHER TAPE
RECORDER
Use the supplied connecting cord, or an optional
RK-G129HG or RK-G136HG connecting cord.
another tape
WM-D6C recorder
. RK-G129HG = © R
LINE OUT um © r
RK-G136HG
LINE IN

RECORDING
CONNECTION
For microphone recording |
For recording from other
stereo component
ee
ECM-S09A electret condenser
stereo microphone (optional)
to LINE iN
supplied
connecting cord
red plug toR Tape deck
to LINE OUT
: Amplifier
white plug to L to REC OUT
-
Notes
@ To connect a stereo microphone with two
L and R miniplugs or two microphones with a
miniplug, use an optional PC-239S plug adaptor.
@ This set supplies power to the ECM-909A
from the MIC jack. When you use the ECM-
909A, remove the battery inside the ECM-909A.

OPERATION
958 6
seal
Insert a cassette.
2 Set the TAPE selector to the appropriate
position.
3 For recording with Dolby B-type NR pro-
cess, set the DOLBY NR selector to
B-TYPE. For recording with Dolby C-type
NR process, set it to C-TYPE. For recora-
ing without Dolby NR process, set it to
OFF. .
4 Adjust the recording level following steps
4 to 7. Set the peak/battery indication
selector to PEAK.
Depress the 1 button.
Depress the @ RECORD button.
Adjust the REC LEVEL control, referring
to the level meter.
8 Press the #8 button again to release the
pause mode. Recording will begin.
To listen to the sound being recorded,
connect the headphones.
NO oN
To stop recording, press the &™ button.
Recording levels for metal, CrO, and normal
tapes are different. When recording with
metal tapes, the level meter should peak at
about +6dB. For CrO, and normal tapes, the
peak level should be about +3dB. The
peak/battery indicator will show the highest
peak at the time for either the left or right
channel, whichever is higher at that instant.
OTHER POWER SOURCES
HOUSE CURRENT
Use the Sony AC-D4HG AC power adaptor
(optional).
First connect the adaffor to DC IN 6V jack,
and then to a wall outlet.
Before connecting, be sure to read the in-
struction manual for the adaptor.
12V CAR BATTERY
Use the Sony DCC-120A car battery cord
(optional), and connect the DC IN 6V jack on the
set to the cigarette lighter socket of a car. Set the
voltage selector of the DCC-120A to 6V. For
further details, refer to the instruction manual of
the car battery cord. :
Notes
@ When the AC power adaptor or the car battery
cord is connected to the DC IN 6V jack, the
internal batteies (if present) are automatically
disconnected.
@ Use only the AC-D4HG AC power adaptor or
DCC-120A car battery cord. Do not use any
other AC power adaptor or car battery cord.

FUNCTIONS TO MAKE
RECORDING/PLAYBACK
EASY
MIC ATT (attenuator) switch
The
microphone
attenuator-is
useful
for
re-
cording
a
large
input
signa!
on
location
(like
rock
music)
or
recording
with
a
microphone
very
close
to
the
source
without
overloading
the
recorder
amplifier.
Normally
set
this
switch
to
the
0dB
position.
Set
it
to
the
20dB
position
to
avoid
overloading
the
amplifier
of
the
recorder,
when
you
make
a
live
recording
with
high
input
signals.
The
“20dB”
position
attenuates
the
input
level
by
20dB.
Cue and review function
During
playback,
you
may
skip-over
unneces-
sary
portions
of
the
tape
by
pressing
the
PR
CUE
button
or
repeat
a
certain
portion
of
the
tape
by
pressing
the
<q
REVIEW
button.
(The
sound
is
muted
during
this
function.)
When
the
me
CUE
or
<q
REVIEW
button
is
released,
the
recorder
will
automatically
re-
turn
to
the
playback
mode.
Il (pause) button
Depress
the
§#
button
to
stop
the
tape
for
a
moment in playback or recording mode. To re-
start, press the button again to release it.
To stop the tape for an extended time, use the
4 button.
Automatic shut-off mechanism
In
playback
or
recording
mode,
tape
motion
stops
at
the
end
of
the
tape
and
the
locked
buttons
will
return
to
the
original
position
automatically.
In fast forward or rewind mode, however, the
locked button wil! not be released automati-
cally.
Be
sure
to
press
the
&m
button
to
re-
lease it,
One touch review function
During recording, you can listen to the mate-
rial just recorded with this function. While
recording, when the <q REVIEW button is
depressed,
only
the
@
RECORD
button
will
be released and the tape will be rewound. By
releasing the <@ REVIEW button, the
recorder will go into the playback mode.
10
Instant edit function
During playback, simply depress the @
RECORD button, and the recorder will im-
mediately change to the recording mode.
This function is convenient for correcting a
previously recorded portion.
Peak/battery indicatay and indication selector
To observe the input level during recording or
recorded level during playback, set this selec-
tor to PEAK.
The indicator will show the input level or the
recorded level for either the left or right chan-
nel, whichever is higher at that instant.
To check the battery condition, set the selec-
tor
to
BATT.
The
bottom-most
LED
will
light
to
show
the
battery
condition.
If
the
indicator
glows faintly, replace all batteries at once.
When the selector is set to OFF, no LED will
light up. - ;
Tape counter for indexing the tape contents
Before
recording,
push
the
reset
button
to
set
the counter to ‘‘000". Make a note of the fig-
ures to help you locate later a desired pro-
gram on the tape.
To prevent accidental erasure
Break out the small tabs on the rear of the
cassette.
The
@
RECORD
button
cannot
be
depressed if a cassette with its tabs broken
out is used. To reuse a cassette for recording
after the tabs have been removed, simply
cover the slots with a small piece of cello-
phane or vinyl tape.
S cellophane tape
To make a blank erasure
1 Insert a cassette.
2 Ensure that nothing is connected to the
LINE IN and MIC jacks.
3
Set
the
REC
LEVEL
control
to
minimum.
4 Depress the @ RECORD button.

HOW TO USE THE CARRYING
CASE AND SHOULDER STRAP

MAINTENANCE
CLEANING THE HEADS
Clean the heads after every 10 hours of use to
enjoy optimum hi-fi stereo sound: moisten a
cotton swab or a soft cioésh with denatured
alcohol, and gently wipe the parts shown
below.
record/playback head
erase head pinch roller capstan
DEMAGNETIZING THE HEADS
Either prolonged use, or an accidental con-
tact with a piece of magnetized steel (screw-
driver, scissors, etc.) will magnetize the
heads causing an increase in tape noise. In
such an event, Gdemagnetize the heads using
a commercially available head demagnetizer.
CLEANING THE CASING
Clean the casing with a soft cloth slightly
moistened with water or a mild detergent
solution. Do not use solvents such as alco-
hol, benzine, or thinner as they may mar the
finish of the casing.
12
SPECIFICATIONS
Recording system
4-track, 2-channel stereo
Wow and flutter
+0.14% (DIN)
0.04% WRMS (NAB)
Tape speed deviation
+0.3% (speed tuning OFF)
Speed tuner variations
Approx. +4%
Frequency response
DOLBY NR OFF
¢ With TYPE IV cassette
40 - 15,000 Hz+3 dB
« With TYPE II cassette
40 - 15,000 Hz+3dB
¢ With TYPE | cassette
40 - 15,000 Hz+3 dB
S/N (NAB, at peak level)
DOLBY NRC
TYPE IV cassette
71 dB
TYPE Il cassette
71 dB
TYPE | cassette
67 dB
DOLBY NR B
TYPE IV cassette
65 dB
TYPE II cassette
65 dB
TYPE | cassette
61 dB
DOLBY NR OFF
TYPE IV cassette
58 dB
TYPE Ii cassette
58 dB
TYPE | cassette
54 dB
Total harmonic distorsion
0.9% with TYPE IV cassette
MIC (PLUG IN POWER)
(stereo minijack) x 1
0.25 mV with low impedance
microphone
LINE IN (stereo minijack) x 1
77.5 mV (47 kilohms)
Inputs

Outputs LINE OUT (stereo minijack)
x |
output level 0.25V (less than
4.7 kilohms) ».
Headphones (stereo
minijack) x 1
load impedance 8-300 ohms
Power output Headphones .
30 mW +30 mW (at 10%
harmonic distortion)
load impedance 32 ohms
Battery life See page 4.
Power requirements
6V dc, four batteries, size
AA (IEC designation R6)
External power input jack
(required power 6V dc)
accepts Sony AC-D4HG AC
power adaptor (optional) for
~ use on 120V ac 60Hz or
Sony DCC-120A car battery
cord (optional) for use on
12V car battery
Dimensions 181x40x95mm (wi/h/d)
(71,* 154,x33/, inches)
including projecting parts
Weight Approx. 640 g (1 Ib 7 02)
including batteries
Supplied accessories
Stereo headphones (1)
Connecting cord (1)
Carrying case and shoulder
strap (1 set)
Design and specifications subject to change
without notice.
OPTIONAL ACCESSORIES
AC power adaptor AC-D4HG
Car battery cord DCC-120A
Electret condenser stereo microphone
(with stero miniplug) ECN.909A
Stereo headphones
MDR-94, MDR-CD550
Connecting cord
RK-G129HG (stereo miniplug to two phono
plugs)
RK-G136HG (stereo miniplug to stero
mini-plug)
Plug adaptor PC-239S (stereo miniplug to two
minijacks)
Continued trouble-free operation of any tape
recorder is dependent on the quality of the
cassettes used in conjunction with it. The -
use of Sony cassettes is recommended for
high quality recording and trouble-free opera-
tion.
Your dealer may not handle some of the
above listed optional accessories. Please ask
the dealer for detailed information about the
optional accessories available in your
country.
13

PARTS IDENTIFICATION
@ Peak/battery indicator and_ indication
selector
@ Tape counter and reset button
© DOLBY NR selector
© TAPE selector
@ REC LEVEL (recording level) control
@ @ RECORD button
@ MIC ATT (microphone attenuator) switch
@ MIC (PLUG IN POWER) jack (stereo mini-
jack)
© HEADPHONES jack
14
@ 1 (pause) button
@ &P (fast forward) CUE button
@ <4 (rewind) REVIEW button
® m® PLAY (playback) button
© “@ (eject/stop) button
@® HEADPHONE VOLUME control
@ LINE IN jack
@ LINE OUT jack
@ SPEED TUNE selector and controi
© DC IN 6V jack