Tascam DA-30 - Page 25

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9. Adjustment of ATF GAIN 9. ATF GAINSE
1) Connect CH-1 of the oscilloscope to TP413 (PILOT)
.
and
CH-2
to
TP407
(SWH).
1).
trae
AaU-SOCH-LETPALZ(PILOT)
(<,
CH-2TP
( € 2) ‘Load the level test tape TY-7111, then set the unit 407(SWH) CEN LUE S.
to the PLAY mode.
3)
Adjust
semi-fixed
resistor
R487
for
head
A
and
R486
2).
UNAMF
Ab
F-T
Y-THIERAL,
PLAY
for head B so that the 130 kHz pilot signa! (levels eayees
A and B) are 200 + 20 mV as shown in Fig. 4-6. evs.
At this time, the difference in output between level 3). Bl4-6 OIC, 130KHzO-*4 oy RBC LSA,
Aand level B should be 20 mV or less.
B) 2d 200+20eVic ZK SIC, Any FEOWTI
AER R487, Bry FOU CREREMI R
486 SMT S. KM. CMDLEA, BOUNBI, 20
BEA CHSC SE,
{ y
¢ CH-1
€
(PILOT)
rAEy
; 200mVt20mvV +20mvV
~— HEAD A HEAD B
CH-2
(SWH) | |
Fig. 4-6
10. Adjustment of the envelope detection level 10. 2y~o-SRY <A
1) Connect CH-1 of the oscilloscope to TP412 (ENV) é Z
and
CH-2
to
TP407
(SWH).
1).
*#yvoe
aa
FT
OCH-1
=
TPAL2
(ENV)
t=.
CH-2=TP40
2) oad the level test tape TY-7111, then set the unit 1(SWH) ICS MLRERS SZ.
to the PLAY mode.
3)
Adjust
semix-fixed
resistor
R505
so
that
the
levels
2).
VNXARF
ARO
F-TN-NMEHAL,
PLAY
of output waveforms A and B are 800 + 100 mV. ae
{
%
At
this
time,
if
the
difference
in
output
between
level
Serene:
. Aand level B is too great for both of them to be the 3). Bl-7 OI, WHRBA, BOL <A d* 80041000
standard value, match the higher to the standard value.
CH-1
(RF ENV)
800mv 2100mvV
CH-2
(SWH)
Fig. 4-7
View Zid EME R05 EHBTS. MC
DEXA, BOWNEUAS ( MMM ASRUBG
lt, KAWHOVKAEMBBK SHS.
800mV+100mVv
Tike
25
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