Teac A-5500 - Page 30

Fine Adjustment:
REC LEVEL SET (HIGH)
uPWNEH
6.
OVERALL FREQUENCY RESPONSE (H!/GH)
.
Apply
signals
swept
from
40
Hzv24
kHz
at
-28
dB
to
LINE
IN
jacks
NOTE: It is absolutely essential to accomplish the coarse ad-
justment before performing the fine adjustment to avoid phase
error larger than 45°.
.
Connect
the
test
equipment
as
shown
in
Fig.
11-1.
.
Apply
a
7.5
kHz
signal
at
-28
dB
to
the
LINE
IN
jacks
and
record
this signal.
.
Carefully
adjust
the
azimuth
screw
until
the
oscilloscope
shows
the signals to be in phase.
. Secure the screw with insulating lock paint.
Phase Shift
M-0406
Fig. 11-8 Phase shift
Refer to Fig. 11-1 Fine Adjustment Set-up (playback)
NOTE:
The
OUTPUT
control
must
be
at
the
Specified
Output
Level
position
(-8
dB
at
OUTPUT
jacks),
and
the
LINE
INPUT
controls
at
the
Specified
Input
Level
Setting.
.
Thread
a
record
Test
Tape
TEAC
YIT-8003
or
equivalent
on
the
unit.
.
Apply
a
400
Hz
signal
at
-8
dB
to
the
LINE
IN
jacks.
Place
Tape
SPEED
switch
to
the
19
cm-7-1/2.
position.
.
Place
the
MONITOR
switch
to
TAPE,
EQ/BIAS
switch
to
HIGH
position.
.
Adjust
REC
LEVEL
VR-811/812
(on
the
rear
panel)
for
-8
dB
signal
at OUTPUT jacks.
Check
and
obtain
0
VU
reading
on
the
VU
meters.
and record them.
.
Adjust
VR-501/502
for
best
response.
.
Place
the
Tape
SPEED
switch
to
the
9.5
cm-+3-3/4
position.
.
Apply
signals
swept
from
40
Hzv15
kHz
at
-28
dB
to
the
deck
INPUT
jacks.
.
Adjust
VR-503/504
as
in
19
cm-7-1/2
speed.