Yamaha N-100 Service Manual page 38

N-100
No. Key
26 D#4 Pedal 1 check
(Soft pedal)
27 E4 Pedal 2 check
(Sostenuto pedal)
28 F4 Pedal 3 check
(Damper pedal)
31 F#4 MIDI check
35 G4 Keyboard check by types
41 G#4 Master ROM check 2
42 A4 Slave ROM check 2
48 C7 Test Mode Exit
Table 2 Switch test order
Order Switch name
1 DEMO
2 PIANO/VOICE
3 SELECT
Other inspections
1. MASTER VOLUME
Usually, [MASTER VOLUME] is evaluated by sensory test. When there is a doubt, measure and confirm with the measured value.
The amount of change should be the following value.
Test program item:
Maximum attenuation: Not less than 70 dB
2. NOISE
When no key is played, the noise level at L and R channels should be as follows.
PHONES L, R: less than -88 dBu
Backing up the data
The N100 does not have data backing up function.
38
Test item
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).
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).
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 [MIDI IN] jack and [MIDI OUT] jack with the MIDI cable and execute the
test.
For the OK test result, the sine wave of C4 sounds (for 1 second).
For the NG, the sine wave of C2 sounds (continuously until any key is pressed).
Judges the type of the keyboard connected. The result is successful if the GHD keyboard
is connected appropriately.
For the OK test result, the sine wave of C4 sounds (for 1 second).
For the NG, the sine wave of C2 sounds.
To check the ROM checksum connected to the CPU bus (Full address)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For the NG, the sine wave of C2 sounds (continuously until any key is pressed).
It takes 23 seconds before checking is completed. (No sound will be played for 23 seconds
after the G#4 key is pressed.)
To check the ROM checksum connected to the CPU bus (Full address)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For the NG, the sine wave of C2 sounds (continuously until any key is pressed).
It takes 45 seconds before checking is completed. (No sound will be played for 45 seconds
after the A4 key is pressed.)
To end the test program and reset to the normal mode (for restarting).
Note No.
C3
D3
E3
Output Level R Check/Output Level L Check
Test function and judgment criteria