Teac V-970X - Recording Performance Details; Built-in Oscillator Checks; Overall Frequency Response and S;N Ratio; Erase Efficiency, REC MUTE, and Separation

|
V-970X/R-919X
ADJUST
(or CHECK)
EPH
oe POINT, REMARKS
WEA - MIE ® #
OUTPUT ( L/R )
Measure output level at
then at "+" portion.
HAVAILS "-" Ame "+" Ame
ENENHETS
INPUT SIGNAL
ITEM SETTING
i ANNES
MRA R €
TAPE : MTT-5511
Mode : REC / PAUSE
CAL START sw. ON
won
-" portion
LEVEL cont. (L/R)
Fully "-" position then
fully "+" position
a Re "+" A
teow
Variation between "-" and “+” portions
"ee" BOUAILEIL
4 d8 or more 4 dB YE
OUTPUT ( L/R )
Measure output level at "-" portion
then at "+" portion.
HAVANA "-" Aime "+" AAC
ENENHETS
(
20. Buili-in
oscillator —
(
BIAS,
LEVEL
=|
Tape:
MIT-5511
check
)
|
Hode
=:
REC
/
PAUSE
CAL START sw. =: ON
BIAS cont. (L/R)
Fully “-" position then
fully
"+"
position
Variation
between
"-"
and
"+"
portions
"-"
Fi—i,
RK
"+"
Aa
"eh
&"e"
HOUAIVEME
—i
5
dB
or
more
5
dB
Eb
21.
Overall
Connection
:
fig.
5-1
:
LINE IN ( I/R) :
frequency
TAPE:
MIT-5571
ae
:
Fake
response
TAPE
=
MTT-5561
40
H2
~
12.5
kHz
/
OUTPUT
(
L/R)
:
Standard
Fig.5-13
-42 dB ( 6.15 mv )
SRA EHE «| TAPE: MTT-5511
METAL 45 dB min.
Cr 02 45 dB min.
OUTPUT ( L/R )
Connection : Fig. 5-1
22.
Overall
TAPE:
MTT-5571
NORMAL
44
dB
min.
S/N
ratio
TAPE:
HIT-5561
BS
S/N
It
400
Hz
/
-9
dB
(
275
mV
)
is
the
TAPE MIT-5511
reference level.
BEL AMIS 400 HZ / -9 dB ( 275 mV )
Connection : Fig. 5-1
but engage 1-kHz filter
1-KHZ 74 DV 2—ER
23. Erase efficiency | TAPE : MTT-5571
AME
LINE IN ( U/R) :
1 kHz / +1 dB
( 0.869 V )
OUTPUT ( L/R )
Check 65 dB min. ratio
Record
a
1
kHz
signal.
Erase
thr
latter
half
of
the
recording.
Rewind
and
play
to
fined
the
difference
between
the
1
kHz
portion
and
the
erased
portion.
RADA
EBELKCBOVNIVERELDAVEL,
BEADEMAKUKROMALAVEORENE,
Same
as
above
Same
as
above
Check
OUTPUT
(
L/R)
:
fal
fa
o£
65
dB
min.
ratio
24,
REC
MUTE
function
Record
a
1-kHz
signal.
Push
REC
MUTE
bitoon
midway.
Rewind
and
play
to
find
the
difference
between
the
1-kHz
REC
MUTE
35
portion
and
the
"rec
mute”
portipon.
1
KHZ
ESEREL.
BHT
REC
MUTE
RAIL
CRE
BRERP
LIED.
COT -TEBEL, 1 KHZ MP CRMESMP COMNVUAVESHE.
LINE IN :
Same
as
above
L
ch
een
check
OUTPUT
(R)
Ja
Rh
No
signal
30
dB
min,
ratio
25.
Channel
FUZ8
separation
F
vrai
Set
the
deck
to
record
mode.
Rewind
and
play
to
find
the
difference
between
the
1-kHz
recorded
portion
(
L-ch
)
RNy-Yary and " no signal “ portion ( R-ch ).
RoR,
BELT
1-kHz
BEM
(
L-ch)
ERIESRAMD
(
R-ch
)
EODHAVAIVECHE.
Change the above connection and check reverse operation also,
l-ch
&
Rh
ANBAKBAKOWTHEF
ry
7tSCE.