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Tascam DA-30 - Page 26

Tascam DA-30
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11.
Adjustment
of
the
PLL
free-running
frequency
1}
Set
the
unit
to
the
STOP
mode.
Set
the
switches
and
controls
to
their
required
settings.
2)
Connect
TP402
PIN
1
to
GND.
(Short
TP402
using
the
shorting
pin.)
3)
Connect
the
frequency
counter
between
TP401
PIN
1
and
GND.
4)
Adjust
by
turning
oscillation
coil
T402
so
that
the
frequency
counter
reads
8.350
+0.01
MHz
(8.350
£0.1
MHz
during
checking).
5)
Disconnect
the
shorting
pin
from
TP402.
12.
Adjustment
of
the
recording
current
Notes.
1.
To
adjust
the
recording
current,
both
the
PCM
section
and
ATF
section
should
be
adjusted.
Adjust
the
PCM
section
first.
2.
The
blank
tape
used
for
recording
should
be
one
with
an
unused
portion
on
which
no
RF
signal
has
been
recorded.
12-1.
Confirmation
of
the
output
level
of
the
PCM
section
1)
Connect
CH-1
of
the
oscilloscope
to
TP412
(ENV),
and
CH-2
to
TP407
(SWH).
2)
‘Load
the
level
test
tape
TY-7111,
then
set
the
unit
to
the
PLAY
mode.
3)
As
shown
in
Photo
4-1,
make
a
note
of
the
signal
level
voltages
of
heads
A
and
B
at
the
PCM
section
(1.57
MHz)
of
the
waveform.
Photo
4-1
12-2,
Confirmation
of
the
recording
current
of
the
PCM
section
1)
Connect
CH-1
of
the
oscilloscope
to
TP412
(ENV)
and
CH-2
to
TP407
(SWH).
2)
Load
a
blank
TY-30B
tape
for
recording
and
check
there
is
a
section
which
has
not
been
previously
re-
corded
before
making
a
non-signal
recording.
3)
Rewind
the
recorded
portion,
then
confirm
that
the
pDlavback
signal
levels
of
heads
A
and
B
of
the
PCM
section
(1.57
MHz)
are
within
+3
dB
of
the
levels
noted
down
in
12-1
above.
(Refer
to
Photo
4-2.)
26
ll.
PLLEAXARKERBE
1).
STOPKBE
TS.
BSW.
GVREUERTH.
2).
TP402
PIN
©
GNDISMS.
C1TP02
Sesg-—be
yikova—btS.
)
3).
TP4OL
PIN’
&
GNDMIICRRRK
YO
Yo
~
SHER
S.
4).
ARRAO
YY
—
OM
8.350+0.01Mz
HHBLS
<,
BRIN
1402
SEHLCMHTS.
(F247
Bld,
8.350
£0.1MHz)
5).
1P02
Dy
a-—bhe
CYERD.
12,
sce
A
tS
.
RBRAK
IDs
PCMBCAT
FLESH
OE
FO,
WF
PCMROMBEAKTAICE.
.
RAS
SY7
-
+
-7it,
RF(SSieRL
HOE
DRUREN
DBF
SHST
Soe.
12-1.
PCM&BOWDL
<1
te.
1).
4
YORA-~SOCW-LETPAL(ENV)
Ic,
CH-2%
TPAO7
(SH)
KENCTHEBRT
SD.
2).
UNARF
AES
F-T
TY-TMIKRBL,
PLAYS
-
FEDS,
3).
BHa-1
OBI,
RHO
PCMaB(1.S7MHz)
D(H’
~
MBAND
KF,
BNy
FENTNMVCHSD
SICK
CAE
LTH.
12-2.
PCM
icae
aire
cei
1).
4
¥ORA—SOCH-1LETPALACENV)
AC,
CH-2%
TP40T
(SWH)
KEN
VAEET
S.
2).
IRL
9
49
+F
-T
TY-20B
SHAL,
AMO
BHCHSCLEWMIALKR
MSSRAT
SD.
3).
RESRBELERASERL,
WELLE
ZOAN»
KF,
BN»
FEREHOD
pcwas(1.STHz)
Oe
~
Os
12-1
PCE
(4
S)
LAE
KNMOLIGR
EAN
THSLCESMUTS.
(GM4-2
BH)

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