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•
C
13
KH
JU
1
SVOG
T
—
t
T
*
t
C
*
WT
«
|
20
MBS
M
—
0
1
wb
]
r
i §
r
MMt
F
3
OXSaie m
*
< M
L
_
JI
I
i
0.1
JHM
RVl
aw
]
MS
i
E
•
Figure 6
-
9
.
TIB
Board
Layout
n
Ensure that the
duty cycle
of the TTSA
signal is
5
B
%
.
STEP 9
STEP
10 If
the
duty cycle
is not 50 %
,
follow the
adjustment
procedure
described in Section 6.5
.
5.2 TTSA
Adjustment
Procedure
.
6.5
.
5.2
Tape
Tachometer TTSA
Adjustment
Procedure
STEP 1
After
Checking
the TTSA
signal
with the
procedure
listed in Section 6.5
.
5.1
,
adjust
RV 1
on the
TTS
board for a
reading
of
50 %
duty cycle
.
( refer to
Figure
6
-
10 )
6.5
.
5.3
Tape
Tachometer TTSB Check Procedure
Proceed with Section 6.5
.
5.1 STEPs 1 through 6
.
STEP 1
Connect the 14
-
pin
DIP
Clip
to IC 13
.
Connect the
positive
lead of the oscilloscope to
pin
10
of IC 13
via the DIP
Clip
.
This
signal
is the TTSB
signal
.
Set the oscilloscope
uncalibrated
sweep
so
that
one
cycle
of the waveform
equals
the full ten
segment
horizontal scale
on
the
oscilloscope
screen
.
STEP 2
6
-
20
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