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r
TD-X321
NarcEto^tru
i
3.
Routine
oÍ
electrical
circuit
adiustment
:
Perform
the
tape
transport
checks and
head
azimuth adiustment
before
following
checks and adjustments.
Adjustment should
be per:formed in
the order of-adjustment
steps.
ln the
steps
marked
with
an asterisk
(
*
), adiustment should
be
performed after
replacing
the
heads.
Perform this adjustment
with
the
N
R
switch
set
to
OF
F.
No.
Item
Check
point
Adiustment
position
Condition
Adjustment,
Conf
irmation
*1
Playback
level
I
LIN
E
OUT
I
adiustment
l
(When
the
head
is
replaced, adjust
playback
level.)
L:
VR102
R
:
VR2O2
vTT724
1)
Plarr
back
the
vTT724
te§t tape.
2) Adjust VR102, VR202
so
that
LINE OUT
level
be-
comes
-8
dBs.
3)
Headphone
OUT:
-24
dBs
t
3
dB
4) DIN OUT
:
-8
dBs
t2
dB (TD-X321G)
*2
Playback
frequency
response
adjustment
L:
VR101
R
:
VR201
TMT735
1
)
Play back,the
TMT735
test tape.
2)
Adjust VR101, VR201
so
that
LINE OUT
level
be-
comes
+0.5
+
0.5
dB
(1
kHz
-
12.5
kHz).
*3
Bias
frequency
adiustment
Connect
the
body
of
c81
7.
L801
METAL
tape
1)
Connect
the
frequenqy counter
to
the
LINE
OUT
terminals.
2) Adjust
L801
so
that
the counter
reads
95
kHz.
r
Standard value :
95
kHz
l
2kHz
*4
Adjustment
of
HX
pro.
Rl47
R247
L105
L205
METAL
tape
1
)
Record with,
METAL
tape and
play
it
back.
2)
Adiust
Ll05
and
L205
to
minimize
voltages
at
R147
and R247
respectively
with the
tape being
played
back.
*5
Rec/PB
frequency
response
adjustment
LINE
IN
LINE OUT
L
: VR104
R
: VR204
NORMAL
Blank tape
1)
NR
switch:
OFF
2)
Record
a
1.25
kHz
signa!
at
an
input
reference
level
of
-20
dB.
3)
Record
1.25kHz and 12.5kHz
signals
and
play them
back.
4) Adjust VR104 and VR204
so
that the
deviations
of
1.25
kHz and 12.5kHz outputs
satisfy
the
standard
values
with
respect
to
1
kHz
output.
o
With
respect
to
1
kHz
reference
At
12.5
kHz
:
0.5
t
0.5
dB
(Adjustment)
*^
o
Recording
gain
adjust-
ment
LINE
IN
LINE OUT
L
: VR103
R :
VR203
NORMAL,
CrO2,
METAL
Blank
tapes
1) Apply
a
1
kHz
signal
to the LINE lN
terminals.
2)
Adjust VR103, VR203
so
that
LINE OUT
terminal
level
becomes
-8
dBs
t
0.5
dB.
o
CrO2
:
-B
dBs + 2
dB
(Confirm)
o
METAL: -8
dBs
t
2
dB
(Confirm)
7
Rec/PB
distortion
check
LINE
IN
LINE OUT
NORMAL,
CrO2,
METAL
Blank
tapes
1) Record
a
1
kHz,
-8dBs
signal
through LINE
OUT
terminals.
2l
PlaV
back
the
recorded
part.
3)
Check
thp
output
with
a
distortion
meter
to
see
if
the
value
conforms
to
the
standard
value.
o Standard
value
INORMALI
:
Less
than
2%THD
lCr0z
I
:
Les
than
3%
THD
IMETALI
:
Less
than2o/oTHD
1
6
(No. 4305)
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