Yamaha SPX50D Service Manual page 17

SPX50D
SPX50D
If
an OFFset voltage
is
present, the
click
noise
can be heard from the monitor
speaker.
(3)
Adjust
VR102
on the
AD
circuit
board
to
minimize
the
click
noise
level.
5.
TEST5
:
User's
memory
setting
(1)
Select the
test-number
"5",
and
press
the
"RECALL"
switch to
initiate
the
test.
The message
will
appear on the
LCD
as
shown
below
PRESET USER
PRG.
(2)
Press the
STORE
switch
.
The
data
in
Me-
mory
locations
1
through
50
will
be du-
plicated to
Memory
locations
5
1
through
100
.
(3) If
you won't
to
perform
this
function, pr-
ess the
"MEMORY"
switch,
and
press
the "
T
"
or
"
i
"
switch
to select
other
routine.
6.
TEST
10-17
:
DRAM
CHECK
(1
)
Selectthe
test-number
"1
0" through "17",
and press the
"RECALL"
switch
to
initiate
the
test.
The
LCD
will
indicate a
message
as sho-
wn
below.
(
3
)
/
AD
^-AVR102
ij -y
5.
TESTS
ij-ro-fe'yxT
V;?''
U)
rx
h 5
iRECALLi
DIAGNOSTICS
V
*
.
*
PRESTET USER
PRG.
3
(2)
STOREXT
^
'J
-No.51~100
^
ij
-i-.
No.l
^
Ij
*^'3
h°—
tlo
6.
TEST
10—17 DRAM
5"
X
a)
rX
H0~17^jlfj^L.
[recall!
(
2
)
DIAGNOSTICS
V
*
.
*
TEST
DRAM
TEST
DRAM
test-no.
(r X
F
No.)
MSB
DRAM
IC-no.
LSB
message
at
the " "
section
(
10 IC202 IC201
IC206 IC205
THR
1
IC201
IC206 IC205 IC204
04
B
12
IC206 IC205 IC204 IC203
08B
13 IC205 IC204 IC203
0000 12B
14
IC204 IC203 0000 0000 16B
15
IC203 0000 0000 0000
20B
16 1000
0000 0000 0000
-
MX
17 01
1
1111 1111 1111
+
MX
21