Pioneer WTM-A4 User manual

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STEREO
CASSETTETAPEDECK
1. SPECIFICATIONS
2. FRONT
PANEL
FACILITIES
3. DISASSEMBLY
4. PARTSLOCATION
5. EXPLODEDVIEWS
AND PARTS LIST. . . . . .
6. BLOCKDIAGRAM
7. P.C.BOARDS
CONNECTIONDIAGRAM
8. SCHEMATIC
DIAGRAM
9. PACKING
10.ELECTRICALPARTSLIST . . .
1
1. MECHANICAL
ADJUSTMENTS
.
12. ELECTRICAL
ADJUSTMENTS
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YZ @
MAYI98I
MODEL
CT-6RCOMES
IN SEVENVERSIONS
DISTINGUISHED
AS FOLLOWS:
Thisservicemanualis applicableto ûte KU type. Forservicingof theotrer types,
additionalservice
manual.
o For the circuit & mechanismdescription,
please
refer to the supplement
of
manual
(ARP-001-0).
r Cemanuetd'instruction
se
refère
aumode deréglaç,en francais.
o Estemanual
deservicio tratadelmétododeajusteescritoenespafiol.
CONTENTS
DER
NO.
T-
671
-O
refer to the
-7R sarvice
34
35
40
42
49
51
58
60
12OV,22OV and 24OV (Switchable)
12OV,22OV and 240 (Switchablel U.S.military model
Printed
in ltpan

1. SPEC|FtCAT|ONS
Systems Compactcassette,2-channelstereo
Motor. . . . . DCservo
motorx 1
(Fordrivingthecapstan)
DC
high-torque
motor
x 2 (For
driving
thereel)
Heads
. . . ."Ribbon
Sendust"
recording/playbackhead
x 1
Erasingheadx 1
FastWinding
Time . . . Approximately90seconds
(C-60
tapel
Wow
and
Flutter . . Nomore than
0.04%
{WRMSI
FrequencyResponse -20dBrecording:
Normal,LHtapes . . . .2O
to 16,000H2
' |.25
to 14,000H2
t3dB)
Chromiumdioxidetape.. .. ..20to18,00OHz
(25
to 16,000H2
t3dB)
(odB
recording;25to 10,000H2)
Metaltape 20to 20,000H2
(25
to 17,500H2
t3dBl
(0dB
recording;25to 15,000H2)
Siganl-to-Noise
Ratio
DolbyNROFF. .... Morethan59dB
DolbyNRON
.. .... BTypemorethan69dB
CTypemorethan79dB
(at
SkHz)
Harmonic
Distortion . . . Nomore
than
1.2%
(OdBl
Input
(Sensitivity/Maximum
allowable
input/lmpedance)
MIC(L,R) 0.3mV/30mVn2k0,6mm diam.
jack
(Reference
MIC
impedance;250O
to 1OkQ)
Lf
NE
(lNPUTl
x2 .. . . . 50mV/25Vl100kQ,
Pin
jack
Output (
Reference
level/Loadimpedance)
LINE
(OUTPUT)x2 . . .450mV/50kO,Pinlack
Headphones . 60mV/8S-t,
6mmdiam.
jack
Subfunctions
a Auto reverse,
autorepeat functions
o MS/SKIP (Music
Search/Skip)
system
. RECMUTE
switch
o Dolby NR system
(B type/C type/OFFIwith LED
indicator
lamp
o Stand-by mechanismwith unattended recordingand
playback
o 3 position
Auto tapeselector
(NORM/CrOz
/METAL)
o Full
automaticstopmechanism
o 2color
digital
levelmeter
o 3digitmechanical
tapecounter
o lC-basedlogiccontrol
o Cassettecompartment
illumination
o INDEX
SCAN
system
Miscellaneous
PowerRequirements ..... AC120V/60H2
Power
Consumption 43U\latts
Dimensions . . . .42O
(W)
x 99.5
(H)
x 270
(D)mm
16-9/16
(W)
x 3-15/16
(H)
x 10-5/8
(D)
in.
Weight
(withoutpackage) 5.3kg
(12
lb)
Furnished
Parts
Connectioncordwithpinplugs ....... 2
Operatinginstructions ........1
NOTE:
Specifications and the design subject to poss,ible modifications
without notice due to improvements.
NOTE:
1. Reference
Tapes:
Normal& LH: DIN45513/BLATT
6 orequiv.
CrOz
DIN45513/BLATTT(CrOz)
orequiv.
2. ReferenceRecordingLevel: Meter OdB indicating
level (160nwb/m magneticlevel = Philipscassette
reference
level)
3. Reference
Signal:
333H2
4. Wow & Flutter: o JIS [3kHz,
compensation
(weighted),
rms
valuel
5. Frequency Response:
o Measured
DOLBY NR OFF, level
deviation
indication.
with acoustic
at -20dB level,
is t6dB without
6. Signal
to NoiseRatio: . Measured
at the third har-
monic
distortion
3%level,
weighted.
7. Sensitivity: lnput level(mV) requiredfor reference
recording level with input (REC) controls set to
maximum.
8. MaximumAllowableInput: While
decreasing
settings
of input (REG) level
controls
and increasing
level
at
input
jacks,
thisisthemaximum
inputlevel
(mV)
at
the point where
recording
amplifier
outputwaveform
becomes
clipped.
9. Reference
Output Level:Playback
output level
when
meterindicates
OdB.
1O.This
modeldoesn't
employ
with arecording/playback
connector
(DlN-typel.
I

2.FRONT PANEL FACILITIES
e Powen
switch
The
power
comesonwhenthis switch
is
depressed;
it is
turned
off
whentheswitch
isreleased.
@ EJECT
switch/cassette
door
The cassette door opens when this switch is depressed.
NOTE.
The door will not open when the tape is running or when the
pausefunction is working.
@ Tape
COUNTER/RESETswitch
The tapecounter
indicates
the tap€'s traveling
position.
Depressthe reset switch
before
recordingor playback
to
reset
the
counter
to "000."
@ LEVEL
meters
Theseindicate
the input or output levelduring
recording
or playback.
O Playback
function switches
Playback
operations
canbeperformed
when
thesections
withthe
followingsymbols
are
depressed:
DD (fastforward): The tape runsat highspeed
from
<< (rewindl: left to right.
The tape runs at high speed
from
right
to left.
cif (direction): The direction of the tape travel is
reversed
(even
in the Pause
mode).
@ Recording
function switches
Recordingoperationscanbe perfor
with thefollowing symbolsare
PAUSE: The tape tra
can be tem
cording
st
switchagainto
the switches
ring recording)
suspended (re-
). Depress
this
recording.
cluring fast
NOTE:
The tape witt not stop when this swirchlis
forward or rewind operations-
REC:
RECMUTE:
seconds),
the tape is automaticall{
Recording
can
This enables blanks to be
created be ams for con-
venient play (MS/SKIP,
INDEX
SCAN).I
o MS/SKIPswitch ,
This
switch
isfor skippingthe
prof now beingheard
and finding the start of the nex am.When
this
switch
is
depressedduring play (lP indicator
lights)
andthen the fastforward {rewind switch
when traveling
in other direction) il , playstarts
from the next Program.
Whenever is
a longinterval
between tape programs (unr anks of over I
forwarded and
plavback
resumes.
PLAY:
STOP: The tapeisplayed.
The tapeisstopped.

Indicator Assembly Removal
Remove the two hooks (D of the panel stay and
pull the indicator assembly
toward you.
Level Meter Assembly
Remove the hook (J of the panel stay and
pull the level meter assembly toward you.
Control Switch Assembly
Remove the two hooks (l of the panel stay and
pull the control switch assembly
toward you.
Panel
stay
Controlsuritch
Indicator
assembly oassembly
Level meter assembly
HeadAssembly Removal
1. Remove the stopper.
2. Turn the head assembly clockwise (FWD
direction).
3. Pull up the head assemblyand remove it.
CapstanBelt Removal
1. Remove the four screïi's €) and remove the
capstaneontrol assembly.
2. Remove the capstan belt from the capstan
assembly.
assembly ldler Pulley æsemblY
Fig.3-5 Capstan
beltremoval I
o
Fig.3-4 Headassemblyremoval

I
Forward
running
ind.
Recording
MUTE ind.
Recording
ind.
Reverserunningind.
PAUSEind.
MS/SKIP ind. - ="'o
DO
POWER
ind.
LBY B/Ctype
ind
@ INDEX
SCAN
switch @ ftfUeR start
switch I
This plays
only the start of the recorded
program
for Thisswitch
is
operated
for unattendeO
recordlngjOr
ptay-
about7 seconds
andthen fastforwards
the tape.
When back
using
thetimer.
usedin combination
with the rewind
( << ) switch,
this REC: For automatically
recording
at the Jo,[ r* on
operation
can
beperformed
withthe
tape
being
rewound. the
timer. - I 'T
@ lrupUf lenel controls OFF: For
when
the
timer
isnotbeing
used. I
These
are used
to adjust
the input signal
level
during PLAY: For automatic
playback
at the timelseil
on the
recording.
The left and right controlsare linked and timer' I I
rotatetogether
but the inside
left channel
anooutsioe @ tvtpx FILTER switch l
right
channel
controls
can
be
used
separately' Depress
this
when
recording
anFM
stereoorolafisr us,ng
@ fUtClacts theDolby
noise
reduction
system. I
lnsert
the microphoneplugs
(L and R) into these
jacks @ OOLSV* NR B/C typeselector i
when
recording
with microphones' Depress
this
to select
type B or typec DolbyiNfr
system
@ pnorugsiack withtheDolby
NRswitch
inthe
oN positiodl.
(ilhe
indi-
lnsert
the
plug
of thestereo
headphones
into
this
jack. cator
BorC lights). I I
@ mooe
setectors @ ooley* NR
oN/oFF
svitch
= : When
thetape
has
been
wound
upon
one
of the Depress
this
to the
ONposition
when
Depress
this
to the
ONposition
when
recordinj
r
back
a
tape
withtheDolby
noise
reduction
sygle
reels' it automatically stops traveling (one-side backa tape
with the Dolby noise
reductionsyj
travel
)
.
.= : The tape starts moving in the forward direction. I
the direction is reversed
at the end of the tape,
the tape starts rnoving in the reversedirection I
andthen stops
at the end (two-side
travel).
and
thenstops
atthe
end
(two-side
travel).
: The
tapeis
repeatedly
played
back. ll
I
* The
word
"Dolby"
and D0 are
trademark
of Dorby
Laboratories
corporation. I
Noise
Reduction
system
manufactured
under
license
fromDorby
Laboratories
Licensrng
corpofatlon

3. DISASSEMBLY
Door Assembly Remova!
1. Depress the EJECT button and open the
cassette
holder.
2. Remove the door assembly from the hooks
attached to cassette holder with the small
screwdriver.
3. Remove the spring with the small screwdriver.
4. Slide the door assemblyto the left and remove
it pulling toward you.
Small screwdriver
Fig.3-1 DoorassemblY
removal
lndicator Panel
BonnetRemoval
Removethefour screws
l)
IndicatorPanelRemoval
1. Push
the two hooks @ of the panel
staywith
the smallscrewdriver.
2. Pull the indicator panel toward you and re-
move
it.
Sub
panel
R Removal
1. Pulloff the INPLIT
knobs.
2. Pustr the four hooks @ of the panel stay
with smallscrewdriver.
3. Pull the sub panelR toward you andremove
it.
$,vitchEscutcheon
Removal
1. Pushthe three hooks (O of the escutcheon.
2. Pull the escutcheon
toward you and remove
it.
Mechanism
AsæmblY
Removal
1. Remove
thecounter
belt.
2. Remove
thesixscrews@
Smallscrewdriver
Sub panel R
o
Y
I
Knobo{lNPUTIFig.
3-2 DisassemblY

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4. PARTS LOCATION
Front
Panel
View
KnobC (F
F, REW)
RAC.2O9
Knob {EJECT)
Switchescutcheon
RN
L-338
** Door panel
assembly
RX8.601
Knob (POWER)
BAC-195
Indicâtor
panel
RNL-358
FrontView with Front Panel
Removed
Levelmeter assembly
RAW-161
** Counter
RAW-168
Cassette
plate assembly
RXX-338
Erase
head
RPB-O94
** Head assembty (REC/PB)
RXX.333
NO?ES
o Parts tt'illtoul par
I rtttrrtbct
cartttol bc sttltltltcd
c The r marh found on some component parts indicates the inoportance of the
safety foctor of the par!. Therefore, when replacing, be sure to uâe prts of identico!
designotion
c For your Parts Stoch Control, the fast mot,ing items are indicotedt u'ith the marhs
** and *
** GENERALLY MOVES FASTER ÎHAN *
This classification shall be adjusted by each distributor because lt dtpends on mod.el
number , temperature, humidity, etc
KnobD (REC)
RAC-193
Knob E
RAC- 1
94
Knob
(INPUT
R)
RAA-361
RAA-362
Knob
(MODE
TIMER)
RAA-359
Subpanel
R
R
NL-380
Knob E
RAC.192
l(rto$ D (PLAY, STOP)
RAC!210
KnCùS (DIRECTTON)
RAG.211
Fuctionswi
tch assemblv
RW9il40
Vatiabfo
resistor
(
|NPUT)
RCV-m6
fr Jack assembty
RKN-075
|lt Rotary
switch
(B)
(MODE,
TIMER)
RSB-03O
** Push
switch (B)
RSG-126
Indicator
æsembly
RAIW-163
LI
.g
I
Knob
(INPUT
Dummy head

TopViewwith Bonnet
Removed
Remote control æsembly
f' ** Fuse
(2Al
4 REK-055
A ** Fuse
(t.
REK-059
A * Porwer
trarsformer
(120V1
RTT.239
Reelmotor control
assembly
B
RWX491
Capstanmotor control
assemblyB
BWX-488
Panel stay
RNT-OI7
Mechanismassembly'
RearPanel
View
Remote control socket
RKP-222
Main chassis
Terminal
RKB-o18
Mother assembly
RWX.5O3
DOLBYNRassembly
1;1
RWX.499
DOLBYNRassembly
1p1
RWX.499
Amplif ier assembly
RWF-G)5
Jackæsembly
RWX-498
Switch assembly
RWS-139
Meter drive assembly
RWX-500
Strain relief
REC-376 I
I