Yamaha PSR-S770, Руководство по обслуживанию

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PSR-S770/PSR-S970
LCD■display
Test■items■and■judging■conditions
032■:■All■LED■On■ Checks whether all the LED lamps light properly or not.
1) Press the [START/STOP] button to start the test.
All the LED lamps are turned on, and “ -■- ” is shown on the LCD.
2) Confirm that all the LED lamps light.
3) Press the [START/STOP] button to exit the TEST item and to turn off all the LED.
033■:■Red■LED■On■ Checks whether all the red LED lamps light properly or not.
1) Press the [START/STOP] button to start the test.
All the red LED lamps are turned on, and “ -■- ” is shown on the LCD.
2) Confirm that all the red LED lamps light.
3) Press the [START/STOP] button to exit the TEST item and to turn off all the red LED.
034■:■Green■LED■On■ Checks whether all the green LED lamps light properly or not.
1) Press the [START/STOP] button to start the test.
All the green LED lamps are turned on, and “ -■- ” is shown on the LCD.
2) Confirm that all the green LED lamps light.
3) Press the [START/STOP] button to exit the TEST item and to turn off all the green LED.
037■:■All■LCD■On■ Checks whether all the LCD dots are turned on (black) properly or not.
1) Press the [START/STOP] button to start the test.
2) Check that all the dots of the LCD are turned on (black).
3) Press the [START/STOP] button to exit the TEST item.
038■:■All■LCD■Off■ Checks whether all the LCD dots are turned off (white) properly or not.
1) Press the [START/STOP] button to start the test.
2) Check that all the dots of the LCD are turned off (white).
3) Press the [START/STOP] button to exit the TEST item.
040■:■LCD■Pattern■Check Checks whether the color pattern of the LCD is shown properly or not.
1) Press the [START/STOP] button to start the test.
2) Use the TAB [
< ][ > ] buttons to call up the color patterns.
Check whether the following patterns are shown on the LCD properly or not.
• RGB
• Rainbow
• Flicker Noise (horizontal)
• Flicker Noise (vertical)
3) Press the [START/STOP] button to exit the TEST item.
041 : LCD Backlight Off
Check
Checks whether the LCD backlight is turned ON/OFF properly or not.
1) Press the [START/STOP] button
to start the test.
The LCD backlight is turned off.
2) Use the TAB [
<
][
>
] buttons to turn on/off the LCD Backlight.
3) Press the [START/STOP] button to exit the TEST item.
042■:■Main■Volume■Check Checks whether the MASTER VOLUME control works properly or not.
1) Press the [START/STOP] button. “
Main■Volume■MIN■xx
” is shown on the LCD.
2) Rotate the [MASTER VOLUME] control to the minimum position.
The value: 0 to 255 is shown on the LCD depending on the [MASTER VOLUME] control position.
When the minimum value is detected, “
Main■Volume■MAX■0
” is shown on the LCD.
3) Rotate the [MASTER VOLUME] control to the maximum position.
When the maximum value is detected, “ OK■■■255 ” is shown on the LCD.
4) Press the [START/STOP] button to exit the TEST item.