Tascam DA-30 - Page 24

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7. Checking the tape path
41) Connect CH-1 of the oscilloscope to TP412 (ENV)
and CH-2 to TP407 (SWH).
2)
Short
TP405
PIN1
(XTEST)
to
ground
(short
TP405
using
the
shorting
pin}.
3) Load the tracking test tape TY-7251, then set the unit
to the PLAY mode.
4)
As
shown
in
Fig.
4-4,
confirm
that
80%
or
more
of
the
RF
waveform
is
flat.
5) Disconnect the shorting pin from TP405.
CH-1 (RF ENV)
CH-2(SWH)
8. Adjustment of TACH
1) Connect CH-1 of the oscilloscope to TP412 (ENV)
and CH-2 to TP410 (TACH).
2) Load the tracking test tape TY-7251, then set the unit
to the PLAY mode.
3) Adjust semi-fixed resistor R496 so that the time from
the leading edge of the TACH waveform tothe marker
of
the
RF
waveform
is
803.6
+15
us,
as
shown
in
Fig. 4-5.
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