Yamaha P-85 Service Manual page 33

No. Key Test item
10 F#3 TG2 check
(Auto Scaling)
11 G3 Pitch check
12 G#3 Output Level R check
13 A3 Output Level L check
14 A#3
15 B3
16 C4
17 C#4 SW check
18 D4 Lighting of all panel LEDs
26 D#4 Pedal 1 check
(Soft pedal)
27 E4 Pedal 2 check
(Sostenuto pedal)
28 F4 Pedal 3 check
(Damper pedal)
29 F#4 Sustain pedal check
Test function and judgment criteria
The sine wave sounds from the low range in the key range (F3 – C6) capable of sounding
while the sound production channel of the sound source is changed one after another.
(The sound stops after sounding of all 32 channels.)
Check that no abnormal sound or noise is generated.
When a key is pressed after Auto Scaling, the sine wave sounds. (Single sound, priority on
fi rst-come)
Press the [DEMO/SONG] button to end this test.
Check that the sine wave of 439.92 Hz ± 0.22 Hz sounds at the level of specifi cation (DAC
input full bit -12 dB). (PAN = Center)
Connect the frequency counter to the [PHONES] jack for measurement.
When the test item is ended with the [DEMO/SONG] button, the sound stops.
Check that the sine wave of 1 kHz sounds at the level specifi ed below (DAC input full bit
-12dB). (PAN = R)
Connect a level meter (with JIS-C Filter) to the [PHONES] jack for measurement.
PHONES L: -50 dBu or less
When the test item is ended with the [DEMO/SONG] button, the sound stops.
Check that the sine wave of 1 kHz sounds at the level specifi ed below (DAC input full bit
-12 dB). (PAN = L)
Connect a level meter (with JIS-C Filter) to the [PHONES] jack for measurement.
PHONES L: -1.0 dBu ± 2 dB
When the test item is ended with the [DEMO/SONG] button, the sound stops.
For factory inspection only.
Press switches one at a time in the order as in Table 2 (p.34). The sine wave sounds at the
scale corresponding to each switch being pressed (Refer to Table 2 in p.34.). Also, when
there is an LED corresponding to that switch, the LED lights up while the switch is pressed.
Check that all switches are pressed correctly, resulting in OK.
Pressing a switch other than specifi ed ones results in NG.
When the pressed switch is not detected even though it is actually pressed, no sound is pro-
duced and the test results in NG.
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
All LEDs should light up.
When the test item is ended with the [DEMO/SONG] button, the LEDs will turn off.
Connect the pedal unit to the [PEDAL UNIT] jack.
The sine wave of C3 sounds when the test is started and the sine wave of C4 sounds when
the pedal is depressed.
When the pedal is released, the sound of the C4 sine wave stops and the test result is OK.
For the NG test result, the sine wave sounds (continuously until any key is pressed).
Connect the pedal unit to the [PEDAL UNIT] jack.
The sine wave of C3 sounds when the test is started and the sine wave of C4 sounds when
the pedal is depressed.
When the pedal is released, the sounding of the C4 sine wave stops and the test result is OK.
For the NG test result, the sine wave sounds (continuously until any key is pressed).
Connect the pedal unit to the [PEDAL UNIT] jack.
The sine wave of C3 sounds when the test is started. The sine wave of G4 sounds when
the pedal is depressed from the OFF position to the half position , and the sine wave of C4
sounds when the pedal is depressed from the half position to the ON position. When the
pedal is released, the sound of the C4 sine wave stops and the test result is OK.
For the NG test result, the sine wave sounds (continuously until any key is pressed).
Connect a foot pedal (FC3) or footswitch (FC4 or FC5) to the [SUSTAIN] jack.
The sine wave of C3 sounds when the test is started and the sine wave of C4 sounds when
the pedal is depressed.
When the pedal is released, the sound of the C4 sine wave stops and the test result is OK.
For the NG test result, the sine wave sounds (continuously until any key is pressed).
PHONES R: -1.0 dBu ± 2 dB
PHONES R: -50 dBu or less
P-85/P-85S
33