Yamaha SY77 Service Manual page 38

SY77
28.
TEST
28:
FOOT CONTROLLER TEST
<
Zi:
Fool Cgntrol
(10
20-80
Connect a foot controller
and
operate
it
throughout
its
range.
Check
that the numbei on
the display
changes from 00-*01
--*20
-*80-*85->99-*95
*80-'20^01-*00
(in
other words,
starting
from
the raised position
then
to the
lowered
position
and back to the raised positionl.
*
28: Fool
Coatrol
x*
TY-t*
(where xx
=
current foot
controller
value,
yy and zz are the next target
values)
DISPLAY OF TEST
RESULTS
OK
* 28:
Foot Contra
I
xx
09 OK
(where
xx=foot
controller
value
at
end
of test)
NG
(No change
In
display)
TEST END
After displaying the
result,
the
test will
end.
If
NG
is
detected during the
test,
refer
to section B.
"B.
PROCEEDING
THROUGH
THE TESTS".
29.
TEST
29;
SUSTAIN SWITCH TEST
<
29:
Sustain
1
Connect
a
sustain switch and
press
it
on and
off.
Check
that the
number
on
the display
changes
from
1
to
0
then
back
to
1
and
verify
that the
OK
result
is
displayed.
DISPLAY OF TEST RESULTS
OK
t 29:
Sustain
OK
NG
(No
change
in display)
TEST END
After displaying the
result,
the test
will
end.
If
NG
is
detected
during the
test, refer
to section
B,
"B.
PROCEEDING
THROUGH
THE TESTS".
30.
TEST
30:
FOOT SWITCH TEST
S 30:
Foot
Switch
1
Connect
a foot
switch and
press
It
on and
off.
Check
that the
number on
the display
changes from
1
to
0
then back
to
1
and
verify
that the
OK
result
Is
displayed.
DISPLAY OF TEST RESULTS
OK
<
30
;
Foot Sv
I
tch
1
OK
NG
(No
change
in
display)
TEST END
After displaying the
result,
the
test
will
end.
If
NG
is
detected during the
test, refer to
section B,
"B.
PROCEEDING
THROUGH
THE
TESTS".
60
SY77