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TEST MODE
Procedure
Wave
ROM
(IC20,
21,
22) | 1. While
pressing
two
E keys simultaneously,
turn on
the power
check
switch.
2. Select the GRAND PIANO sound.
| When
set to the self-diagnostic mode, the Wave
eThe
key number
indicates the Wave
ROM
ROM
outputs
a sine
wave.
The
Wave
ROMs
number
correspond to the keyboard keys as shown in the
(ROM 1: IC20, ROM 2: IC21, ROM 3: IC22).
diagram to the right. When a key is pressed, the
corresponding sine wave sound is produced. If no
sound is produced, or if the sound is distorted, the
Wave ROM corresponding to that key is defective.
CPL, CPR
CPSQ
LED & SW check
14. On the control panel, set ail the sliding BALANCE controls to OFF.
2. While pressing
two F keys simultaneously,
turn on the power
F keys
All the LEDs turn off after lighting once. Confirm that ail the LEDs light.
LCD Display check
While pressing two G keys simultaneously, turn on the power switch.
UR A AL
G keys
The test pattern for the LCD character display is shown. There are 4 different test patterns, which are
selected with the TRANSPOSE
buttons. Only the first display of the test pattern display differs, as
shown at right. Confirm that the characters appear correctly.
Pattern 1
Pattern 3
eee
s.r.
eo |
dJ><ii]
—
O@J><il]
[
Pattern 2
Pattern 4
J DPRRs
OP ABID
DSR,
> AE
1Ha.
Jd Per
JRBRB. I Pet
Keyboard ROM (IC2) check
While pressing two B keys simultaneously, turn on the power switch.
If the keyboard
ROM
(IC2) is OK,
one
confirming
beep will sound.
If it is defective,
several
consecutive error beeps will sound.
eH
Sh
fan
a
EE
Fa
EES
2
a
za
oe : ; 1 co
ec39
A
RT
JR
air
3 2
Z| Fs
Are.
ro
'
9
o
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