TD-X321
*",c,e,eu,u
I
Removal
tr
of Main
Parts
12
1.
Top
Remove
2.
Bottom
Remove
3. Front
(1)
(2)
(No.
a3o5)
cover
@
six screws
"or"r
six
panet
Remove
main P.C.
Remove
@
screws
@
one
board.
four
@,
@
screw
screws
retaining
@
retaining
retaining
@
retaining
@
the
the
top
bottom
the
mechanism
the front
cover.
cover.
panet.
and
(3)
(4)
(5)
(6)
(7)
Remove
out
the
Take
out
Remove
panel.
front
Remove
take out
Pull
out the
P.C.
board.
one
s"rew@ retaining
gear.
the
cassette
two
screws (p
two
screws
the
mechanism.
8-pin connector
the
ggor
@.
retaining the bottom
retaining the
@
(CN801)
gear
@
mechanism
from
and
the
side
main
take
of
and
TD-X321
agrcftrc..w
\,
esafety
TD-x32
1c/J
Precaution
about TD
0904
0902
0903
-X321
\,
\í
TD.X321A/B/E/G/U
v
SAFETY
power
The
@
onto the substrate
shortcircuit in
All wires
@@
from the
heating
touch
them.
PRECAUTION
cord
should be
case of breaking
should be bound
primary
pans
circuit,
(shown
to avoid
sharp edges
ÏTïTïfnT
in
bound
and
securely fastened
contacting other
of the wire.
and arranged
of the
in the diagram)
parts
posibly
chasis and
and
away
not to
Parts
@
should be fastened down with bond or
The
@
since
be
to
primary
primary
the
attached onto the back
(4
wires
wires)
circuit
must
is exposed.
of the
spacers.
be
tied
up in a
(TD-X321U
P.C. board
bundle
only)
(No.
43o5)
3
TD-X321
,irwctltctrtt)
t
t
t,
t,
COMPU
LINK
SYSTEM
This is
originated and
ing are the
formances:
Automatic
When
connecting this
selector
will
select
activation
be
When
the
in five
Synchronized
Synchronized
in
chronism
chronized
1.
2.
3.
Notes:
o
o
o
o
a
convenient
developed
brief explanations
Source Selection
provided
the
have
which
the
minals,
possible
is
button
doing this, the
By
start
button
also
used
the
components
previous
seconds.
switchover
with
playing
button
remote
unit
COMPU
simple
of
JVC's
automatically.
of the
of
purpose.
for this
component
Record ing
recording
which the deck
with
the CD
recording
the
Set
mode in
cedures
on
you
lf
want the
gram
the
hear.
wish to
the PLAY/PAUSE
Press
player.
placed
in the record
the CD
with
recording
nized
Synchronized recording
when the CD
To cancel
button
STOP
deck.
Synchronized
when the
taneously
(pause)
arrd l!
The source
ing
synchronized
stops or
To
synchronized
switch-over
switch over
as follows:
cassette
accordance
page
19.
programmed
desired
By
doing, the cassette
so
ptayer
thus
player
synchronized
of the
recording
record-;rause
pressing
the
buttons
is
locked
recording to
recording f
CONTROL
system
which
by
JVC.
of
its major
cables
other
to
LIN
K-l
/SYNCH
system
all
of
one-touch
corresponding
remote control
the
desired cofnponent
have been
will stop
refers
srarts recording
player.
deck
with the
tunes in
mode
for
can be
stops
CD
does not
mode is
O
in the stop
to
the
to another
the
irst
of
amplifier
srruitched
play,ing
to
Perform
to
record-pause
the
recording
recording,
any
button
and syndrronizod
recording.
made
stops automatically
playing.
recording,
player
set
REC/RE€
position
CD
avoid
components,
has
been
Tha
follow-
per-
are used
Gomponents
RO
components
the
source
rsc€iwr.
or
@mponent
The
source
unit or
over,
with.
pro@ss
the
in
ryn-
the
ryn-
pro-
pro-
you
order
the
óf
CD
dcck is
Synchro-
po*íbto.
press
the
or cassette
start
excspt
by
simul-
MUTE
rnode.
dur-
accldenÍal
corriponont.
cancel
for
ter-
the
can
MAINTENANCE
importance
The
When
the
dust naturally
pinch
and
o
quality
tone
o
the
output sound
previous
othe
r
recordings
Because of
hours
1
0
made.
will be
E
rase
head
Cleaning the
Wipe the
with
swab
For effective cleaning,
f
able
rom
After
cleaning,
has
completely dried
tape
accumulate
roller.
deteriorates.
sound
are
this, clean
use
of
,n
headr,
heads,
its
your
of
cleaning
moving,
is
When
they become
drops.
level
is not
not
satisfactory.
so that
pinch
capstan,
the
dip@
tip
use a
audio store.
be
sure that
before
heads,
the
satisfactorily.
heads,
um
and
etc.
with
powder
capstan
magnetic
on
erased
the
optim
Becord/play
roller
in alcohol.
cleaning
cleaning
the
loading a cassette.
E
Capstan
TROUBLESHOOTING
What
appears
troubJe,
2.
3. Tape
4.
5.
6.
Mako
1. Recording
*
Are
when
safety
Tape does
*
Has the
the
*
Are
insert
*
ls
connect
*
plifier
trol
Sound
*
Are the heads,
dirty?
Hiss noise
attenuated.
*
ls
lf so,
safety
the
lf
replace
so,
the
tab slots with adhesive
lf
has,
it
pause
ruÍlli,
the
cords connected
again
the
remote cable
it
ls
VO
the.
set to MIN?
to an appropriate
is
too
lf
so,
the record/playback
demagnetize it.
Previously
erased.
*
ls
the erase head
to be
first
s.rre
cannot
tabs
the cassette
recording can
not movo.
PAUSE
ll
press
the
mode.
no
but
securely.
correctly.
E
M
LU
low,
pinch
clean them.
is heard,
recording
dirty? lf
is not
trouble
. . . .
performed.
be
of cassette
tape
with a
erased, cover
be
tape.
button been
PLAY
button to cancel
is
sound
heard.
correctly?
disconnected? lf so,
control of
lf
unstable
and
the
is, adjust the con-
it
volume.
or broken.
and capstan
roller
high-frequencies are
head magnetized?
is not
clean it.
so,
new
and
capstan
dirty,
too
etc. every
recordings
head
cotton
a
kit
avail-
fluid
roller
always real
broken?
one,
the
pressed?
lf not,
stereo
am-
completely
Cotton
or
swab
(
(No.
4305)
9
\
TD-X321
.
o,a,c,e,e,r,u
I
WLocation
Main Parts
of
DOLBY
NR
Board
Reaf
Switch
Board
I
(
(No.
1
0
4305)
TD-X321
en,e,e,au,u
Erase
head
M
-
ll
Supply
reel
disk
R/P
head
ïake
r
H
ffi
"r l
I
-,
up
reel
T1"il
disk
Capstan
Pinch
roller
Ass'y
FlywheelAss'y
FM
Motor
Bracket
(No.
a3O5)
11
TD-)«}fi
;ia,ie*,*ïl)
(8)
Take out
panel.and putl
(9)
Remóve two
board.
(10)
Remove
chassis
(11)
Remove
indicator
panet
the
screws
one screw
pull
and
joining
two
board.
@
out thó
@
out the
trom
the left
q.oWer button
retaining
@
reUíníng
jack
phone
points
@
iiae
@.
power
thà
the
left
board.
retaining
of
the
:
side of
the
front
switch
the
LED
(12)
Remove
se[ect
(13)
Remove two
board.
(14)
Pull
(15)
Remove the
nolume
(16)
Remove
two
board.
out the
board.
one
screws
screy§
volume
hexagona!
screw
retaining
@
retaining
@
and balanc" @ knobs.
@
nut
retaining the balance
@
the
.Àí,rk, out the
@
tfre OCiLÉV
opération key
board.
(No.
a3o5)
ryn
13
il)"Xgeí
ÍftëaÉ,rillÀ
14
(1)
Remove
former.
(2)
Pull out
Main
5.
Remove six
board.
(No.
4305)
four
the S-pin wire
P.C.
bord
t"rí**
screws
@,
retaining
@
(FW901)
@
from
retaining
power
the
the
the' main
main
trans-
P.C.
P.C.
6. Other
o
Leaf switc{r
Remove
o
Hall
Semove
,
P.C. boards
board
three
lG board
one screw
scre\À6
@
@
r-etainiirg
reuining
the leaf switch
lC board.
hall
the
board.
1'
I
Main Adiustments
tr
1. Equipment and measuring
1) Electronic voltmeteÍ
2)Audio
3)Attenuator
4)Standard tape.Íor R EC/PB
5)
frequency oscillator
(range:
50-20
Maxell UDI
kHz
(impedance:
(T99)
TDKSA
(for
(for
(for
(
10
,
tape
playback
playback
kHz)
JVCME
Reference tape for
VTT7l2
VTT724
VTT739
vrr703L
and
Normal{SF)
-
Chmma
-
-Metal
playback
speed,
levell ,
Írequency response)
(for
instÍumonB used for adjuíments
outpui
600
dB dith impedance oÍ 600
O
Q)
(SA)
tape
(JVC
r.yow Íluttèr adi.)
head azimuth 8di.)
tape
tap8
or equivalent
-
TestTape)
Ol 8)Wow
:
meter
counteÍ
(for
(bendpar§
6) Resistor 600 Q
TlDistonion
flutter meter
FÍequency
9)
r
Pow.Í rurcG
the line.voltage selector
Set
22OVl127Vl12OVl110V
voltage.
AC 2/O V, 50/60
AC 220 V, 50/60 Hz
AC t2O
Ac 2§v
V,60 Hz
v
1127
t110
r
íttenuator
Hz
(TD-X32IC/J)
matching)
filter)
switó to
according to
(TD-X321A/B)
(TD-X321
v, 50/60
TD-X
240
your
E/c)
(Ttlx321U)
Hz
g21
M,llcatctrtu
V/230 V/
local
Mechanism
2.
Item
Adlusting
motor speed
Checking
wow and
f lutter
Checking
playback
torque
Checking
fast forward
torque
Checking
rewind
torque
Adiusting
Head
azimuth
adjustment
1.
Connect a
LINE OUT
Play
2.
3.
Connect a wow and flutter meterto
OUT
test tape.
the
Employ
the
and use a torque
Measure
mode in
Measure the torque
in the
1.
back the
Adjust volume in
speed at
terminals.
meter
checking, or remove
same
Connect
LINE
2. Playback the
3.
Adiust
until
@
voltmeter becomes maximum
channels.
procedure
Adiustment
frequency
terminals.
VTT712 test
counter to
tape.
motor for
3fi)0 Hz.
Play back the
to
Chèck
is within
a torque
O.16yo
testing
gauge.
the torque
the
same manner as in the above.
manner as
electronic voltmeter to the
an
terminals.
OUT
VTTTO3L
the head angle
the
reading
the reading
see if
(WRMS).
cassette tape
the
in the
the
in
the
in
test tape.
with
of
casette cover
fast
rewind mode
above.
the
VTT712
forward
the
electronic
for both
the
norma!
LINE
screw
of
for
Adiusting
Screw
point
V RsO1
@
Standard
value
Normal
speed:
t
3000
0.16%
(JIS
WRMS}
25-7O
90-150
90-150
Maximum
output
15
Hz
lf the reading
value even
standard,
Repairs
the
gr-cm
lf
tained,
assembly.
gr-cm
lf the
tained,
1.
2.
gr-cm lf the
tained, clean
idler, motor
cumference,
cumference,
ference, etc.
o
Notice:
dBs = O.775
O
Remarks
becomes
if confirming
reclaim
a
necessary.
are
standard
replace
standard
perform
Clean
idler
circumference,
pulley,
circumference,
circumference,
Replace
standard
torque is
the take-up
torque is
the
the capstan
the take-up reel
the belt
torque is not ob-
the
pulley,
rewinding idter
left reel
moving
to
may be raised.
not ob-
disk
not ob-
following.
belt, the
the motor
disk
flywheel
the
etc.
idler.
and
disk
belt,
circum-
capstan
flywheel cir-
(V)
the
cir-
(No.43O5)
15
r
TD-X321
NarcEto^tru
i
3. Routine oÍ electrical circuit adiustment
Perform
Adjustment
ln
Perform this adjustment
No. Item Check
*1
*2
*3
*4
*5
*^
o
7
the tape
should
the steps
Playback
marked with an
level
adiustment
(When
the head is
replaced, adjust
playback
Playback
frequency
response
adjustment
Bias
frequency
adiustment
Adjustment
of HX
Rec/PB
frequency
response
adjustment
Recording
gain
ment
Rec/PB
distortion
check
level.)
pro.
adjust-
transport
per:formed
be
with
point
E
LIN
OUT
I
I
l
Connect the
body
of
7.
c81
Rl47
R247
LINE IN
LINE
OUT
LINE IN
LINE OUT
IN
LINE
LINE OUT
checks and head azimuth adiustment
order
in the
*
the N R
Adiustment
L:
R : VR2O2
(
adiustment should
),
switch set
position
VR102
asterisk
L: VR101
R
VR201
:
L801 METAL tape 1) Connect the
L105
L205
: VR104
L
R : VR204
: VR103
L
R : VR203
of-adjustment steps.
be
F.
to OF
Condition
vTT724 1)
TMT735 1
METAL tape
NORMAL
Blank tape
NORMAL,
CrO2,
METAL
Blank tapes
NORMAL,
CrO2,
METAL
Blank tapes
:
following
before
performed
Plarr back
2) Adjust VR102,
comes
3) Headphone
4) DIN
OUT
Play back,the
)
checks and adjustments.
after replacing
Adjustment,
the vTT724
the
VR202
dBs.
-8
OUT:
-24
t2
dBs
:
-8
TMT735
2) Adjust VR101, VR201 so
comes
+0.5
+
0.5
dB
(1
frequenqy counter
terminals.
2)
1
)
Adjust
r
Standard
Record
L801
value
METAL tape
with,
that the counter
so
:
kHz
95
2) Adiust Ll05 and L205 to
R247 respectively
and
back.
NR
1)
switch: OFF
2) Record a 1.25
of
Record
3)
back.
Adjust VR104 and
4)
1.25
values
o
dB.
-20
kHz
with respect to 1
With respect to 1
At 12.5
1) Apply
2) Adjust VR103,
1) Record a
2l
3) Check
a
becomes
level
o
CrO2 :
o
METAL:
terminals.
PlaV back the recorded
thp output
conforms to the standard
value
o
Standard
INORMALI
lCr0z
IMETALI
kHz
1.25kHz
and
and 12.5kHz
kHz
kHz
0.5
:
kHz
1
signal
VR203
dBs
-8
dBs
-B
dBs
-8
1 kHz,
-8dBs
with
value
: Less than 2%THD
:
I
Les
: Less than2o/oTHD
signa!
VR204
t
to
t
+
t
heads.
irmation
Conf
te§t tape.
that LINE
so
dBs t 3
(TD-X321G)
dB
tape.
test
dB
OUT
level
that LINE OUT level
12.5
kHz).
kHz
-
to the LINE
reads 95
l
2kHz
play
and
minimize
with
the
at an input
12.5kHz
so
signals
that
outputs satisfy
kHz output.
reference
(Adjustment)
dB
0.5
the LINE
so
0.5
2
dB
2 dB
signal
part.
distortion meter to see if the
a
than 3%
lN terminals.
that LINE OUT
dB.
(Confirm)
(Confirm)
through LINE OUT
value.
THD
kHz.
back.
it
voltages at
tape being
reference level
play
and
deviations of
the
the standard
terminal
be-
be-
OUT
R147
played
them
1 6
(No.
4305)
-
Minimum
input
check
R
EC/PB
S/N
ratio
check
levet
LINE
LINE
LINE
LINE
OUT
OUT
OUT
OUT
NR:
NR:C
OFF
search
LINE
Lr
DrN
Play
back
INORMAL]
-
Play
back
[CrO,
Perform
t,::1
::ff
MAL,
confirm
ings
is
more
Record
Bias
leak
Record
recording.
Residual
ATT
lN
N E
our:
rNN
a
a
CrO2
]
recording
ínou1
Cro2
that
than
on
a
metal
:
below
the
I
sound
Adjustment,
varue
with
:
-2OdBs
dBs
-66
:-24dBs
normat
Ut.nÈEpf-
Hum
blank
Hr,
i,
?:!_2t
and
METAL
the
reverdifference
4ZdB
tape.
dBs
-40
kHz
referen
in
the
Confirmation
whích
uNm
t
(tevel
3dB
-t
H
R
and
r
3
dB,evell?;àllifr;fl:íï
and
voltage:
tape.-
,oit.ge:
with
no
tapes
on
,..t,
,.0r.
erased
part:
difference
hïliïïïl;ï.,Ï,,1*::l
L
channets:
L
channets:
betow
betow
input
2.8
l.E
sisnat
mV
mV
withín
within
(TD-X321G)
röil:il,
between
more
the
than
two
between
on
il'ïi
record-
60
dB
3
3
dB)
NoR-
dB)
4.
Location
DOLBY
NR
of
BOARD
Adjustment
VR
vRt04
carz
HEX
1205
@
cf,
Rzq7
2Ol,
I
PRO
ADJ.
Lt05
@
C}
Rt17
RECORDING
&
FREOUENCY
t'^to[TouENcY
'B'
ADJ.
uaw@
ce
oEï:,
spEqo_
(No.
43OS)
lt
TI»X32í
rfiircax*rru
ZBlock
(
Playback
Channel),,,,,-
Diagram
í?ï-
-r--1
-
L_J1-x31G_J
; fMArN Bo-oARDl
l--
lffit
L---,
b''ó"@
(
Recording
Chànnel)
l--------|---_ïÍ_
lLtNp.ur
I
vor-uuE
lBoARDl
;
;mtl.Ne-+_ I i
!l
lBoARDl
----1
i
I
I
ili
I L-
---i
(No.
1
8
4305)
TD-X321 a'rcrcrer.tru
I
;|il i
Est i
;sl
ë1
i€}
ii7!)
,r,{'
ri.i i'
i!:
Dolby
.i)t
#
b
t#
\)t
#t
)
íÉ,
§r
L
NR
cA213
Board
à-i
t,,;i,61^nO,
i::: i;a .,
:
Ëilil07
.!::.
1ffi
0i1,
V;rÈr
LAIUA
#öÏ?"
.-
ii:
Li;:'i4,1 .,k
.!.'i'o'
'..c;'i:ë101
-
RÀIII
.---'
-
-E.CAPACITOR
--
E ,t 7t6u2
8.2
2-2R 51 llóU
20K
2.2K 5r tt6lJ
t,-7K
ioK 3i 1rèu
10K 5Z 1/óW
ó.8K 5Í
f-3K 5U 1/óU
1.0K 5l
ó8K 5Z 1/ólt
100
1.or,t
1.01{ 5u 1/ór,
2.2K 5Z ll6bt
4.7K 5Z 7l6W
10K 5Z
10K 5r 1/óh'
ó.8K
l.l[
1-
6AK 5Z 7t6U
100
1 .01,1 5I 1
1.0r.í
DESCRIPTION
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PARTS NAME
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CONNECTOR
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FILTER
FILTER
FILTER
FILÏER
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ARBON RESISTOF
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(No.4305)
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(No.
4305) 21
trWiring
Connections
Balance
Boa rd
lnput
B
Ha tl lC
Board
Volume
oard
Volume
Main Board
R/P.
E .
Head
Ref lector
Board
d
NR/
B/ C
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R.MODE
DOLBY
CAM Sw
Boar
DOLBY
Counter Switch
NR
Board
Headphone
Board
Jack
Earth
Board
Leaf
Board
Switch
TD-X321
ln,rc'rcuru
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Switch
Board
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Power
Power
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Cord
Supply
V
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Board
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Se
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Po*.,
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Power
Bo
Sw
Boaro
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Suppty
Moto
Color
codes
2.....
3.....Orange
4.....
5.....Green
6..... Blue
7
I
9.....White
O.....
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Cord
are
shown below.
1.....Brown
Red
Yellow
.....
Violet
Grey
Black
Power
Power
Supply
Suppty
Board
Board
lAlB-versto,il
Power
Power
Cord
Cord
(No.
43o5) 1
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