Teac C-3X Service Manual

MEASURING
ADJUST POINT:
ITEM
SETTING
INPUT
SIGNAL
(or
CHECK)
REMARKS
RESULT
Connection:
Fig.
5-1,
but
do
not
connect
LINE
IN
(L)
and
OUTPUT
(L).
Record a 125-Hz signal on R-ch and note output level. Invert tape
and
play
R-ch
track,
Check
leakage
level
against
the
output
reference
of previously recorded portion.
21. Adjacent track
crosstalk
LINE
IN;
BIAS,
EQ:
Co(CrO)
L-ch
No
signal
Check
OUTPUT:
Tape:
MTT-5061
Rech
125
Hz/-9
dB
a
40
dB
min.
ratio
(275
mV)
mt
‘@
Record
a
1-kHz
signal
with
NR
SYSTEM
switch
OUT.
Play
this
portion
with
NR
SYSTEM
switch
set
to
OUT
and
set
to
NR.
Obtain
the
difference
in
output
level
between
OUT
and
NR
positions.
Repeat
the
above
process
using
a
10-kHz
signal.
22.
DOLBY
NR
effect
’
LINE
IN:
OUTPUT:
nt
£O:
ColcrOa)
1
kHz/—29
dB
Check
Variation
Pee
(27.5
mv)
3
dB
to
8
dB
|
LINE
IN
OUTPUT:
BIAS:
.
2:
GolCrO2)
10
kHz/—39
dB
Check
Variation
5
(8.69
mv)
8dB
to
12dB
BIAS,
EQ:
NORMAL
LINE
IN:
,
(1)
|Tape:
MTT-501
Required
signal/
Check
On
ee
NR SYSTEM: NR —42 dB (6.15 mV)
EIN EIN R36 (for L-and |OUTPUT:
Rechannels) Fig. 5-12
(2)
||
NR
SYSTEM:
NR
+
HX
Required
signal/
42
dB
(6.15
mv)
TIWEIN OUTPUT:
23.
DolbyHX
—
(3).
||
NR
SYSTEM:
NR
+
HX
Required
signal/
Check
Re
Baa.
effect
=12
dB
(195
mV)
eee
LINE
IN:
:
INE:
At
10
kHz
to
12.5
kHz,
Ay
ay
NE
SYSTEM
OU
Required
signal/
ee
should
be
lower
than
12
dB
(195
mV)
measured
in
step
(3)
to)
[Ras
Eas
colcro2)
Repeat
steps
(1)
to
(4),
but
substitute
R37
for
R36.
BIAS,
EQ:
Co(CrO,)
R35/R45
trim-pot:
fully
CCW
(7
}
Tape:
MTT-5061
F30/R40
trim-pot:
fully
CW
(>)
INPUT:
TEST
i
ADJUST/PRE-SET
sw.:
ADJUST
i
Record-pause
mode
SE
Loe
as
RECORD
cont’s
|
OUTPUT:
fal
MONITOR
sw.:
SOURCE
|
[fev
(LIR)
=25
dB
(43.6
mV)
1
LINE
IN:
-
|
Record-pause
mode
PEAK
LEVEL
meter:
1
kHz/—29
dB
Check
erp
!
MONITOR
sw.:
SOURCE
(27.5
mV)
Record-play
mode
St
eae
OUTPUT
level
between
the
setting
where
|
R35/R45
24,
BIAS/REC
MONITOR
sw.:
TAPE
breay)
amaximum
output
value
is
obtained
and
|
Yetajis
"ns
CALIBRATION
’
when
the
trim-pot
is
set
fully
clockwise
=a
(on
front
panel)
is
more
than
4
dB.
su
‘Set
R35/R45
in
the
position
correspond-
LINE
IN:
ing
to
maximum
output
value.
Check
that,|
R30/R40
TY
er
Ape
1
kHz/—29
dB
When
F30/R40
is
rotated
from
fully
CW
|
variable
range
e
(27.5
mv)
position
to
fully
CCW
position,
OUTPUT
|
checks
level
is
reduced
by
more
than
10
dB.
ri
oureur;
OS™
LINE
IN:
,
Record-play
mode
Equal
level
with
MONITOR'sw.:
TAPE
soo
Hel
ee
R30/R40
MONITOR
switch,
SOURCE
;
TAPE
and
SOURCE
LINE |
OUTPUT:
Record-play mode 400 Hz/—29 dB
YMONITOR
sw.:
TAPE
6.3
kHz/—29
dB
R3s/R45
tee
level
betwen
12.5 kHz/—29 dB 7
12

Teac C-3X Specifications

General

Brand	Teac
Model	C-3X
Category	Cassette Player
Language	English