Roland Fantom-S88 Service Notes page 26

17. Keyboard
This tests the keyboard.
When you enter the keyboard test, the LCD display will show as follows.
fig.17-1_70
Perform the eight-note check. Play the keyboard to check.
Also verify that the volume changes according to the strength with which you
press the key.
When you press the [8] button, the sound will change, and the LCD display
will show as follows.
fig.17-2_70
Perform the two-note check. Play the keyboard to check.
Press the [8] button to proceed to the next test item.
18. LCD
This tests the operation of the LCD display.
When you enter the LCD test, the LCD display will show as follows.
fig.18-1_70
When you press the [8] button you will proceed to the four-level grayscale test.
The LCD display will show as follows.
fig.18-2_70
Turn the [LCD CONTRAST] knob, verify that four levels of grayscale are
displayed, and set the knob to the optimal contrast.
When you press the [8] knob, you will proceed to the all-pixels-displayed test.
The LCD display will show as follows.
fig.18-3_70
Verify that there are no missing dots, and that the darkness is consistent.
When you press the [8] button, you will proceed to the all-pixels-off test. The
LCD display will show as follows.
fig.18-4_70
Verify that there is no obtrusive dirt or dust.
Press the [8] button to proceed to the next test item.
Fantom-S88
27