Table of Contents
Advertisement
Procedures:
(1) Playback the 2nd tone (400Hz,
-0 dB) of
SONY
alignment
tape
J-19-Fi or J-19-K1.
(2) Adjust R171(R271) to obtain 0dB(0.775V)
on the VTVM.
(3) Adjust R172 (R272) so that the pointer of
the level meter just stays at the boundary
between
the
red
portion
and
the
black
portion.
(4) Change the TAPE
SELECT
switch to SLH.
(5) Be sure that the VITVM reading is -2~-3 dB
(0.61 ~0.55V).
tape, alignment
VTVM
P.B. Amp.
LINE
OUT
Fig. 12-11
P.B. output level adjustment and level
meter calibration setup
12-7.
P.B. Equalizer Adjustment
Connection:
As shown
in Fig. 12-12.
Adjusting Parts:
R145(R245)—19cm/s tape speed ...... See Fig. 12-2
R146(R246)—9.5cm/s tape speed ..... See Fig. 12-2
Switch Setting:
MONITOR
switch ............. TAPE
TAPE SPEED switch ........ 19 cm/s (7% ips)
Procedures:
CAUTION
Never fail to make the 19cm/s equalizer
adjustment first.
A)
In using the SONY
alignment tape J-19-K1
(1) Playback
the
Ist tone (10 kHz, -10dB) of
the tape and memorize
the reading on the
VTVM.
(2) Playback the 2nd tone (400 Hz, 0 dB) of the
tape and adjust
R145
(R245)
so that the
reading on the VTVM
is 10dB higher than
the reading obtained in the preceding proce-
dure (1).
3p
(3) Change
the
TAPE
SPEED
switch
from
19cm/s to 9.5cm/s (from 714 ips to 334 ips).
(4)
Playback
the
ist
tone
of
the
tape
and
memorize
the reading on the VTVM.
(5) Playback
the
2nd
tone
of the
tape
and
'
adjust R146
(R246) so that the reading on
"the VTVM
is 10dB higher than the reading
obtained in the preceding procedure (4).
B)
an using the SONY
alignment
tape J-19-Fi
(1) Playback
the 3rd tone (400 Hz, -10dB)
of
the tape and memorize
the reading on the
VTVM.
(2) Playback
the 4th tone (10kHz, -10dB)
of
the tape and
adjust R145
(R245)
so that
the reading on the VIVM
is the same
as
the
reading
obtained
in
the
preceding
procedure (1).
(3) Change
the
TAPE
SPEED
switch
from
19cm/sto9.5cm/s
(fram 714 ips to 334
ips).
(4) Playback
the
3rd
tone
of
the
tape
and
memorize
the reading on the VTVM.
(5) Playback the 4th tone of the tape and adjust
R146
(R246)
so
that the reading
on the
VTVM
is the same as the reading obtained
in preceding procedure (4).
After the adjustment, perform
the p.b. output level
adjustment
and the level meter calibration.
tape, alignment
VTVM
Fig. 12-12
P.B. equalizer adjustment setup
4th tone | 5th tone
6th tone
i
7th tone
7kHz
80 Hz
40 Hz
2+2dB
4+2dB
(L-CH)
(L-CH)
19 cm/s
0 +24B
|
(TAips)
25+24B | 4.5+2¢B
(RCH)
| (R-CH)
Advertisement
Table of Contents
