Casio PX-130 Service Manual & Parts Manual page 37

3. Press the "FUNCTION" button to perform the "ROM Version check (External)". The confirmation
chords C4, E4, G4 sound.
The "ELEC PIANO", "CLASSIC", "MODERN", "RECORDER" LEDs illuminate and the "R" LED flashes
while on stand-by.
* If you don't wish to perform the "ROM version check (External)", go on to the step (1) of the "4. Button
check".
<LEDs on stand-by>
4. Each time you press the "SONG (u/n)" button, the status of the LEDs changes.
Check to see if the LEDs illuminate in the order shown below.
QC number: 8000501 to 8028031
QC number: 8028032 or later
QC number: 8000501 to 8028031
Sequence
Display
1 (0)
2 (1)
3 (0)
4 (0)
5 ―
* While the external ROM version is indicated, the "R" LED keeps flashing.
4. Button check
1. Press the "FUNCTION" button to perform the "BUTTON check".
The confirmation chords C4, E4, G4 sound, and all LEDs turn off.
2. Press the buttons in the order indicated in the illustration on the bottom.
Each time the button is pressed, the confirmation chord C6 sounds.
If a button is not operating properly or a button is pressed in a wrong order, an error tone (F2) sounds.
* You cannot cancel this test procedure mid-way.
3. When the "ELEC PIANO" button is pressed at the end, the confirmation chords C4, E4, G4 sound and
all LEDs turn off.
External ROM (0100): 0 → 1 → 0 → 0 → Stand-by mode
External ROM (0103): 0 → 1 → 0 → 3 → Stand-by mode
LED status
All LEDs OFF
"ELEC PIANO" LED
All LEDs OFF
All LEDs OFF
Stand-by status as in Step 3
– 35 –
QC number: 8028032 or later
Display LED status
(0) All LEDs OFF
(1) "ELEC PIANO" LED
(0) All LEDs OFF
(3) "ELEC PIANO" + "CLASSIC" LED
― Stand-by status as in Step 3