Yamaha tx81z Service Manual page 29

TX81Z
TXS1Z
5,
Test Program
3:
LCD
check
The
entire
LCD
turns
"ON
and
OFF"
three
times.
If
the
INC
switch
is
pressed
r
the
LCD
will
display
as
shown
below*
When
proper
lighting
of
the
LCD
display has
been
verified, press
the
INC
switch,
and
the Test
Program
will
proceed to
the
next
routine.
6.
Test
Program
4:
LEP
check
The
LCD
will
display the
message
shown
below.
|
Check LED
1-4
i
Switch
Number
Switch
Name
1
STORE/EG COPY
2
UTILITY
3 EDIT/COIVIPARE
4
PLAY/PERFORM
5
parameter
S
7
parameter +
DEC
8
INC
9
MASTER
VOLUME
+-
10
MASTER VOLUME
->
11
CURSOR
Upon
completion
of these tests,
the
test
routine
wilt
reset
the
system
to
the
normal
operating
mode,
The
switch
LED
indicators will light
one
after
' v,
another from
left
to right,
then
all
of the switch
LED
indicators
will
light
simultaneously.
When
proper
lighting
of
the
LEDs
has
been
verified,
press the
INC
switch,
and
the Test
Program
will
proceed
to
the next
routine.
^
7.
Test
Program
5: Panel switch
check
When
this test
is
entered,
switch
number
1
will
appear
in
the
LCD
display
as
shown
below.
\
Check switch
1
switch runnier
Press
the switch that
is
indicated
by
the
LCD
display.
If
an
Incorrect
switch
is
pressed,
the Test
Program
will
not advance. Pressing the correct switch
will
advance the Teat
Program to the next routine.
29