Sony WALKMAN PROFESSIONAL User manual

I STEREO CASSETTE-CORDER
OPERATING INSTRUCTIONS
Pleasereadthis operating manual thoroughly
before operating this high quality electronic
unit,so that you can obtain the maximumen-
joyment from it.
This manual should be retainedfor future ref-
erence and used to answer your operational
questions as they arise.
( WALKMAN is a trademark of Sony Corporation 1
O 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.
Model 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 limitsare designedto provide reasonable
protection against harmful interference in a
residential installation. This equipment
generates, uses, andcan radiate radiofrequency
energy and, if not.installed and used in
accordance with the instructions, may cause
harmful interferenceto radio communications.
However,there is no guarantee that interference
will not occur in a particular installation. If this
equipment does cause harmful interferenceto
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:
Reorientor relocatethe receivingantenna.
Increase the separation between the
equipmentand receiver.
Connect the equipment into an outlet on a
circuit different from that to which the receiver
isconnected.
Consult the dealer or an experienced radiorrV
technicianfor help.
TABLE OF CONTENTS
Features .......................................... 3
Precautions ....................................... 3
Battery insertion ................................. 4
Cassette insertion
.............................. 5
Playback
.......................................... 6
Recording
....................................... 8
Otherpower sources ........................... 9
Functions to make recordinglplayback
easy
............................................. 10
How to use the carrying case and
shoulder strap
................................. 11
Maintenance
.................................... 12
......
Specifications .......................... i... 12
Partsidentification
.............................. 14
Warning
You are cautioned that any changes or
modifications not expressly approved in this
manual could void your authority to operate this
equipment.

FEATURES PRECAUTIONS
Quartzlock capstan servo system assures
accurate and stable tape speed.
In addition to the conventional B-type
Dolby
* NR system, theWM-D6Cemploys 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.
DC-DCconverter booststhe low voltage of
DC 6V and maintains sufficient power.
Amorphous head for recordinglplayback
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.
MIC(PLUG IN POWER)jack cansupplypower
to an ECM-717electret condenser stereo micro-
phone (optional).
Threedifferent power sources: batteries,
house current, and 12Vcar battery.
5-LED peaklbattery indicator shows both
the peak level and the battery strength.
Stereo minijacks can be used for connect-
ing to audio components.
'Dolby noisereduction manufacturedunder licensefrom Dolby
LaboratoriesLicensingCorporation.
"DOLBY" and the double-D symbol m are trademarks of Dolby
LaboratoriesLicensingCorporation.
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 havetheset checkedbyqualified person-
nel before operating it any further.
On headphones
Road safety
Do not use headphones while driving,
cycling,or operatingany motorizedvehicle. 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
pedestriancrossings.
You should exercise extreme caution or
discontinue use in potentilally hazardous
situations.
Preventinghearing 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.
Caringfor others
Keep the volume at a moderate level. This
will allow you to hear outside sounds and to
beconsiderateto the peoplearoundyou.
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 haveany question or problem concern-
ing your set that is not covered in this man-
ual, pleaseconsult the nearest Sony Service
Station authorized to service tape recorders.

BATTERY INSERTION
Insert four batteries, sizeAA (IECdesignation
R6), with correct polarity, referring to the
illustration below.
Note: When the set is not to be used for a
long period of time or istobeoperated exten-
sively on other power sources, remove the
batteries toavoid set damage caused by bat-
tery leakage and corrosion.
Battery life
1 continuous recoding 1 7rzy 1
To check the battery condition, press any of
the function buttonsand set the peaklbattery
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 lifeof other type batteries or batteries
of other manufacturers may be different.
TYPE I. IV
6
3
TYPE IV
Sony AM3 (N)
alkaline batteries
4
Sony SUM-3 (NS)
2
batteries (hours)
NPE I
5
2.5

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.

PLAYBACK
CONNECTION For playback through speakers
For playback through the headphones
I
OPERATION
peaklbatteryindication
selector
- to PEAK
1 Insert a cassette. 5 Adjust the volume of the headphones with
2 Set the TAPE selector to the appropriate the HEADPHONEVOLUME control.
position.
3 For Dolby 0-type NR processed tape, set
the DOLBY NR selector to 0-TYPE.
For DolbyC-type NR processed tape, set it
to C-TYPE.
For non-DolbyNR processedtape, set it to
OFF.
4 Depressthe b PLAY button. Playbackwill
begin.
Adjust the volume of the speakers with
the volume control of the amplifier.
To stop the tape during playback, press the
1. button.
To rewind the tape, press the REVIEW
button.
To advance the tape rapidly, press the
H
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 theSPEEDTUNEselector toON
and turn the SPEED TUNE control to F (fast)
or S (slow). For normal tape speed, set it to
OFF.
When the RECORDbutton is pressed, this
selector isautomatically set to the OFF posi-
tion.
TO DUPLICATE ONTO ANOTHER TAPE
RECORDER
Usethe suppliedconnectingcord, or an optional
RK-G129HGor RK-G136HGconnectingcord.
another tape
RK-G136HG
LINE IN
@

RECORDING
CONNECTION
For microphone recording
For recording from other
ECM-717 electretcondenser
stereomicrophone(optional)
stereomicrophone(optional)
Notes
To connect a stereo microphone with two
L and R miniplugs or two microphones with a
miniplug, usean optional
PC-239s plugadaptor.
This set suppliespower to the ECM-717from
the MICjack. For details, refer to the instruction
manualsuppliedto ECM-717.

OPERATION
1 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 record-
ing without Dolby NR process, set it to
OFF.
4 Adjust the recording level following steps
4 to 7. Set the peaklbattery indication
selector to PEAK.
5 Depressthe II button.
6 Depressthe RECORD button.
7 Adjust the REC LEVEL control, referring
to the level meter.
8 Press the II button again to release the
pause mode. Recording will begin.
To listen to the sound being recorded,
connect the headphones.
To stop recording, press the +m 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
peaklbattery indicator will show the highest
peak at the time for either the left or right
channel, whichever is higher at that instant.
HOUSECURRENT
Use the Sony AC-D4HG AC power adaptor
(optional).
First connect the adaptor to DC IN 6V jack,
and then toa wall outlet.
Before connecting, be sure to read the in-
struction manual for the adaptor.
12V CAR BATTERY
Use the Sony DCC-127A car battery cord (op-
tional),andconnectthe DC IN6
V jack on the set
tothecigarettelightersocketof acar.Setthevolt-
age selector of the DCC-127Ato 6
V. For further
details, refer to the instructionmanualof the car
batterycord.
Notes
Whenthe AC poweradaptor or thecar 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-127Acar batterycord. Do not useany other
AC power adaptoror car batterycord.

FUNCTIONS TO MAKE
RECORDINGIPLAYBACK
EASY
MIC ATT (attenuator) switch
The microphone attenuator is useful for re-
cording a large input signal on location (like
rock music) or recording with a microphone
very close to the source without overloading
the recorder amplifier. Normally set this
switch tothe OdB position. Set ittothe20dB
position to avoid overloading the amplifier of
the recorder, when you makea 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 pressingthe
H
CUE button or repeat a certain portion of the
tape by pressing the
a REVIEW button.
(The sound is muted during this function.)
When the
H CUE or a REVIEW button is
released, the recorder will automatically re-
turn to the playback mode.
I1 (pause) button
Depress the
I1 button to stop the tape for a
moment inplaybackor recordingmode.To re-
start, press the button again to release it.
To stopthetape foranextendedtime, usethe
&8 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.
Infast forward or rewind mode, however, the
locked button will not be released automati-
cally. Be sure to press the
6. button to re-
lease it.
One touch review function
During recording, you can listen tothe mate-
rial just recorded with this function. While
recording, when the
44 REVIEW button is
depressed, only the RECORD button will
be releasedand the tape will be rewound. By
releasing the
u REVIEW button, the
recorder will go into the playback mode.
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.
Peaklbatteryindicator andindicationselector
To observethe input levelduring recordingor
recorded levelduring playback, set this selec-
tor to PEAK.
The indicator will show the input level or the
recorded levelfor 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
toshow the battery condition. Ifthe 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
Beforerecording, pushthereset buttontoset
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 reuseacassette for recording
after the tabs have been removed, simply
cover the slots with a small piece of cello-
phane or vinyl tape.
To make a blank erasure
1 Insert a cassette.
2 Ensure that nothing is connected to the
LINE IN and MICjacks.
3 Set the REC LEVEL control to minimum.
4 Depressthe RECORD button.

HOWTO USETHE CARRYING
CASE AND SHOULDER STRAP

MAINTENANCE SPECIFICATIONS
CLEANING THE HEADS
Cleanthe headsafter every
10 hoursof useto
enjoy optimum hi-fi stereo sound: moisten a
cotton swab or a soft cloth with denatured
alcohol, and gently wipe the parts shown
below.
recordlolayback head
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, demagnetize 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.
Recordingsystem
4-track,2-channelstereo
Wow andflutter M.14% (DIN)
0.04% WRMS (NAB)
Tape speeddeviation
M.3% (speedtuningOFF)
Speedtuner variations
Approx. f4Y0
Frequency response
DOLBY NR OFF
WithTYPE IVcassette
40
- 15,000 HZ f 3dB
With TYPE II cassette
40-15,000Hz*3dB
WithTYPE I cassette
40
- 15,000 Hi! k 3dB
SIN (NAB, at peaklevel)
DOLBY NR C
TYPE IVcassette
71 dB
TYPE
II cassette
71 dB
TYPE
I cassette
67 dB
DOLBY NR B
TYPE IV cassette
65 dB
TYPE IIcassette
65 dB
TYPE Icassette
61 dB
DOLBY NR OFF
TYPE IV cassette
58 dB
TYPE IIcassette
58 dB
TYPE
l cassette
54 dB
Total harmonicdistorsion
0.9% with TYPE IV cassette
Inputs MIC (PLUG IN POWER)
(stereo minijack)
x 1
0.25 mV with low impedance
microphone
LINEIN (stereominijack) x 1
77.5 mV (47 kilohms)

Outputs LINE OUT (stereo minijack)
x 1
output level 0.25V (less than
4.7 kilohms)
Headphones(stereo
minijack)
xl
load impedance 8-300 ohms
Power output Headphones
30mW+30mW (at 10%
harmonic distortion)
load impedance 32 ohms
Battery life See page
4.
Power requirements
6
V dc, four batteries,size AA
(IECdesignation R6)
Externalpower inputjack
(requiredpower 6
V dc)
acceptsSony AC-D4HG AC
poweradaptor (optional) for
useon 120
V ac 60 Hz or Sony
DCC-127A car batterycord
(optional)for useon 12
V car
battery
Dimensions 181
~40x95mm (wlhld)
(71/4x1%x3%inches)
including projecting parts
Weight Approx. 640g (1Ib 702)
including batteries
Suppliedaccessories
Stereo headphones(1)
Connectingcord(1)
Carryingcase andshoulder
strap (1set)
Design and specifications subject to change
without notice.
OPTIONALACCESSORIES
AC power adaptorAC-D4HG
Car batterycord DCC-127A
Electretcondenserstereo microphone
(withstereo miniplug) ECM-717, ECM-909A
Stereo headphones
MDR-94, MDR-CD550
Connectingcord
RK-G129HG(stereo rniniplugtotwo phono
plugs)
RK-G136HG(stereo miniplugto stero
mini-plug)
Plugadaptor 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
highquality recordingand trouble-free opera-
tion.
Your dealer may not handle some of the
abovelisted optional accessories. Pleaseask
the dealer for detailed information about the
optional accessories available in your
country.

PARTS IDENTIFICATION
0 Peaklbattery indicator and indication
selector
@ Tape counter and reset button
Q DOLBY NR selector
@ TAPE selector
0 REC LEVEL (recording level)control
0 RECORD button
@ MIC ATT (microphone attenuator) switch
0 MIC (PLUG IN POWER) jack (stereo mini-
jack)
0 HEADPHONESjack
0 Il (pause)button
Q) bb (fast forward) CUE button
@ 44 (rewind) REVIEW button
(D b PLAY (playback) button
@ Am (ejectlstop) button
@ HEADPHONEVOLUME control
0 LlNE IN jack
@ LlNE OUT jack
SPEED TUNE selector and control
@ DC IN 6V jack

S0ny Corporation Printed in Japan