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tape, blank
AF
Osc
REC Amp.
AUX
C
1 kHz
-10dB
LINE OUT
Fig. 12-19
Record bias adjustment setup
12-13.
Record
Level Adjustment
Connection:
As shown
in Fig. 12-20.
Adjusting Parts:
R120:(R220).....cccmennrsciee. See Fig. 12-2
Switch Setting:
MONITOR
switch .........cceeeeeeeeees TAPE
TAPE
SELECT
switch ........0... NORMAL
NOISE
SUPPRESS
switch .......... OFF
TAPE
SPEED
switch ........... 19 cm/s (7% ips)
VR Setting:
AUX VOLUME
............. indicated on page 25
Procedures:
(1) Thread a blank tape.
(2) Deliver
a 1 kHz
signal
of -10dB
(0.24V)
into
the AUX
INput jack and
record
the
signal on the blank tape.
(3) Adjust R120 (R220) to obtain 0dB on the
VTVM.
(4) Be
sure
that
the VITVM
reading
is O0dB
(0.775V)
when
changing
the
MONITOR
switch to SOURCE
and the pointer of the
level
meter
just
stays
at
the
boundary
between
the
red
portion
and
the
black
portion
when
changing
the
MONITOR
switch to TAPE.
(5) When
changing
the
TAPE
SELECT
switch
to SLH
with
the MONITOR
switch set in
SOURCE,
be sure
that the reading on the
VTVM
decreases approximately
1.5 dB.
AUX
1 kHz
-10 dB
LINE
OUT
Fig. 12-20
Record level adjustment setup
12-14.
Record
Equalizer Adjustment
Connection:
As shown
in Fig. 12-21.
Adjusting Parts:
ICA Bo SEG Ie 6 RE ate PER ee See Fig. 12-2
Switch Setting:
MONITOR
switch
ow...
TAPE
TAPE
SPEED
switch ......0..0.000.
19 cm/s (7% ips)
VR Setting:
AUX
VOLUME............. indicated
on
page 25
Procedures:
(1) Be sure that the p.b. equalizer adjustment,
the
trap
coil
adjustment
and
the
record
bias adjustment have been made.
(2) Thread a blank tape.
(3)
Deliver a 1 kHz signal of -40 dB (7.75 mV)
into
the
AUX
INput
jack
and
memorize
the reading on the VTVM,
while recording
the signal on the blank tape.
(4) Change
the
signal
from
1kHz
to 20kHz.
(5)
Adjust
L101
(L201)
to
obtain
the
same
reading obtained in preceding procedure (3)
on the VTVM.
(6) When changing the signal continuously from
20 kHz to 10 kHz be sure that the deviation
on the VTVM
is within +3 dB.
If the deviation is more than +3 dB in level,
make
the
tape
pass
and
the
record
head
azimuth
adjustments.
AF
OSC
REC Amp.
tape, blank
AUX
:
1, 20kHz
-40dB
LINE
OUT
Fig. 12-21
Record equalizer adjustment setup
— 34 —
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