Teac A-2300SR - Bias, Record Level, and Frequency Response Adjustments; Bias Adjustment Procedure; Record Level Setting; Overall Frequency Response

8-17 REC LEVEL SET
13.
14.
15.
16.
17.
18.
Place
BIAS
SW
and
EQ
SW
to
the
|
position.
Thread
a
blank
Test
Tape
YTT-8013
on
the
deck.
Place
Tape
SPEED
SW
to
the
7-1/2
ips
position.
Apply
a
400
Hz
signal
at
—8
dB
(308
mV)
to
the
LINE
IN
jacks.
;
Begin recording.
Adjust
VR-303/306
for
—8
dB
(308
mV)
at
OUTPUT
jacks.
8-18 FREQUENCY RESPONSE —OVERALL—
NOTE: To avoid saturation of the tape these checks
19.
21.
i
[
L
pa
{
'
RESPONSE IN dB
+ :
RESPONSE IN 4B
should
be
made
at
least
20
dB
below
the
specified
input
level.
Any
Bias
signal
feeding
into
the
test
equipment
should
be
filtered
out
by
adjusting
the
external
Bias Trap.
BIAS and EQSW ............- 1
Tape SPEED SW..........- LOW
Apply
signal
swept
from
40 Hz
to
the
upper
frequency
limit
shown
in
the
applicable
Response
Limits
Chart
below,
and
record
this
signal
on
the
YTT-8013
test
tape
for
BIAS/EQ
1
and
on
the
YTT-8023
test
tape
for
BIAS/EQ
2.
.
During
recording,
monitor
the
tape
signal
and
adjust
equalization
L-301/L-303
for
+2
dB
reading
at
14
kHz
so
that
reading
is
within
the
applicable
Response
Limits
Chart.
Repeat
this
procedure
for
High
Speed
also,
using
the
frequency
limits
given
in
the
applicable
Response Limits
Chart.
“4
4 it iit
40 69 63 100 500 « 8K 10K 6K BOK
FREQUENCY IN He
|
:
+4
+2
°
-2
: |
~4
TI
H
4050 63100 3K 10K 20K 30K
si 1
FREQUENCY IN Hz
Fig. 8-10 Frequency Response — OVERALL — 1
BIAS and EQSW .............-245. 2
Using blank Test Tape ..... TEAC YTT-8023
NOTE: If the response is not uniform, the heads should be
cleaned of accumulated oxide and dirt.
Then adjust VC-402/404 Bias Adjuster slightly to
obtain the best frequency response.
+ FS
oO
°
RESPONSE IN dB
ny
s
in TO nt
3-3/4ips
A
| +3 [|
{444
pal
|
=|
4
‘om
ct ni
40
50
63
100
500
"
5K
YOK
12K
50K
RESPONSE IN dB
te}
8
&
3
8
™
FREQUENCY IN Hz
Fig. 8-11 Frequency Response — OVERALL — 2
19