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ADJUSTMENT
12.2I{EADAZITIUTH
Setting
Mode
TestTape
AC mV meter
VR101, VR201
.... Playback
. SID-3414
(10kHz,- 20dB)
. . . LINE OUTPUT
Turn up to ma:rimum
position
Procsdure
Adjust the azimuth adjusting screw for maximum AC mV meter readings for both L and R
channels. After this adjustment, lock the screw
with screwlock.
12.4 PLAYBACK LEVEL ADJUSTMENT
Sincethis adiuilrnentdeterminec
the DOLBYNR lewl
during playback, it should be performed prccirely.
Setting
Mode
TestTape
AC mV meter
.. .. Playback
. STD-841A(333H2,0dB)
. . . TPl (L ch) and TP1
(R ch) of the DOLBY
assembly
Procedure
Adjust the VR101 (L ch) and VR201 (R ch)
so that the AC mV meter reads- 1.2 dBv (0.87V).
L I N EO U T P U T
STD'34I4
r0(Hz -20d8
slD
333H2
Fig. 12-3 Headazimuth adjustment
Fig. 12-5Playbackleveladjustment
12.3 PLAYBACKEOUALIZERADJUSTMENT
Setting
Mode
Test Tape
Playback
sTD-341A
AC mV meter
(333H2 and 6.3kHz,
-20d8)
LINE OUTPUT
Procedure
1. Play back the 333H2 and 6.3kHz portions of
the STD-341A, and check that difference between the two output levels does not exceed
1.5d8!2d8.
2. Connect the tenninal No.22 with No.23 of
the mother assembly.
Play back the 333H2 and 6.3kHz portions
again, and check that the difference between
the two output levels does not exceed
-2.5dBi2dB.
NORM Dosrrron
l33Hz ouloul -6.3kHz ouloul
=l SdBi2dB
siD-3!ra
333Hr -20d4
6 3k. -20d8
12.5 OVERALL FREOUENCYRESPONSE
ADJUSTMENT
Serting
Record
Mode
sTD-6084,
Test Tape
STD-603,
sTD-604
LINE OUTPUT
AC mV meter
Input Signal
333H2, -30dBv (31mV)
to LINE INPUT
STD-6084
333Hr turour-6
= o.SdB t0
3rHr erDul
5dB
Fig. 12-6 Overallfrequency responseadiustment
Fig. 124 Playbackequalizercheck