Tascam 3030 - 3-6 DBX PCB Adjustment

$
3€
DBX PCB
ADJUSTMENT
TIOTES:
l.
This
section adjustment
is not
usually
needed
unless
an ad-
justor(sl
have
been
changed
0r a
component(sl
on
the
pC
board
have
sustained
damage,
since the PC
board
has
been
precisely
adjusted
in the factory.
2.
Turn the
deck
0FF to
prevent
accidental
damage
when
removing
or replaceing PC
board.
3-6-t
ADJUSTMETIT
p0tilTS
L0CAT|0trl
N*fiEF
3-6
DBX*+E+,f+EE#
rit
1
.
D B X
+
fh
o
&Y, F"
\ t*E li
f+'>
t;
r*
6
a
|tt,
i6'H I
A
DB X*tE
HfTd);iE45l*4iX<i
.
z.*tEr,I
+t t&rttt*?;t&,L't
j'y
+aEttR&tJJ )Th\
411t*';
(<
/:at\.
lcilRch
EilCODER
\L/)-t )
n27/W28
YGA
symmelry
VCA'>>./lt)-
R723/R724
l{ominal level
,S+v
^
)v
R753/R754
RilS
symmetry
RMS
7
>r/
l-
rJ
-
IIECODER
R627lR628
YCA
symmetry
vca->>t
t-t)-
R623/R624
llominal
level
z*Ev
^)v
R653/R651
RMS
symmetry
RMS'>>.'1
lt)-
Fig.3-9
3-6-2
VCA
SYMMETBY
AOJUSTMEITIT
WAVE FORM
VCA i>ttt)8#.iEY..
Fig.
3-1O RMS
symmatry adjustment
(incorrect)
(RMSr>./l'rffilE.TF)
Fig.
3'11
RMS
symmetry adjustment
(correct)
(RMS>>./l.U-aEE.H)
A
J\ .A
A t \ I
\ \ \
\ \
LI
\/
1
IVI
\ \ \/
V
\/
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20