Teac A-7300RX - Page 20

_——
_
MONITOR
PERFORMANCE
—-?-HH——
10-10
MONITOR
LEVEL
SETTING
MONITOR
SW
.........
SOURCE
Input
selector
SW
.........
LINE
1.
Apply
a
400
Hz
—18
dB
(97
mV)
signal
from
AF
oscil-
lator
to
LINE
IN
(L-A/R-A)
jacks.
2.
Turn
REC
MASTER
controls
and
LEFT
A,
RIGHT
A
controls
fully
clockwise.
3.
Adjust
V&-401
(L-A
and
R-A
both)
and
VR-402
(L-B
and
R-B
both
)
for
—8
dB
(308
mV)
at
the
OUTPUT
SOURCE/TAPE
jacks.
NOTE:
Adjuster
VR-401/402
is
located
on
MIC
MIXING
AMPL.
UNIT.
OSCILLOSCOPE
RI °
SOURCE/ TAPE
1-390-1
Fig. 10-8 Test Connections for Monitor Check
10-11 SPECIFIED LINE CONTROLS SETTING
4.
Apply
a
400
Hz
signal
at
—8
dB
(308
mV)
to
the
LINE
IN jacks.
5. Adjust LINE controls (LEFT A/RIGHT A) for —8 dB
(308 mV) at OUTPUT SOURCE/TAPE jacks.
NOTE:
At
this
point
both
the
Line
controls
(LEFT
A/
RIGHT
A)
and
the
OUTPUT
controls
are
at
the
“Specified
setting”.
Do
not
move
these
controls
unless
instructed
in this
procedure
to
do
so.
The
accuracy
of
many
of
the
following
adjustments
and
readings
depends
on
these
controls
being
at
the
“Specified
setting”.
6.
Repeat
the
procedure
for
the
LEFT
B/RIGHT
B
side.
10-12
VU
METER
LEVEL
SET
7.
Check
VU
meters
for
0
VU
indication.
_
8.
Adjust
VR-707/708
(on
TRIMMER
RESISTORS
UNIT)
for
O
VU,
if
necessary.
10-13 MIC INPUT LEVEL CHECK
This is a check only. No adjustments are to be made.
—
WwW
Input SelectorSW.......... MIC
MIC
ATT
SW
..
0
dB
(on
Back
panel)
. Apply a 400 Hz signal at —48 dB (3.08 mV) to the MIC
IN Jacks (L-A/R-A).
. Check for —8 dB +1 dB (345 mV—274 mV) level at
OUTPUT SOURCE/TAPE jacks.
. Place MIC ATT (dB) SW to 20 GB position.
. Apply a 400 Hz signal at —8 dB (30.8 mV) level to the
MIC IN jack.
. Check for —8 dB +2 dB (388 mV —244 mV) level at
OUTPUT SOURCE/TAPE jacks.
. Repeat the procedure for L-B/R-B side.
Fig. 10-9 Mic Att switches location — REAR VIEW —
21