Yamaha AvantGard N2 Maintenance Handbook - Page 9
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[1 key measurement mode]
Content
1 Refer to start-up methods Start measurement mode
Do not touch anything
2
(sensor aging)
Make measurement key
3
setting and start measurement
Set measurement key
Measure the "rest value"
4
5 Load data into RAM
Measure the "end value"
6
7 Load data into RAM
Save data and write into
8
Flash memory
9 End measurement
* The operating guide tones in the NU1 are generated electronically, and an operating guide appears on the panel LED screen.
* If measurement fails, then the 78[D4] and 76[C4] keys are trilled and the tone for the applicable error key is generated (*NU1: key
no. displayed).
Sensor test mode
Defi nition of term
· REST
: Position when the keyboard is not pressed.
· END
: Position when the keyboard is lightly pressed to the bottom of the key.
· K1/K2/K3/K4 : Four threshold values between the REST position and END position when a key is pressed. While the value
of the END is 10 mm, the threshold values are K1 = 2.7 mm, K2 = 4.5 mm, K3 = 6.3 mm and K4 = 8.1 mm.
· M1/M2
: Two threshold values between the REST position and END position when a hammer is in motion. The
distance between the M1 and M2 is 10 mm while that between the M2 and END is 1 mm.
[Key sensor test mode (N3, N2, N1, NU1)]
Startup method
N3, N2, N1: [A-1]+[B-1]+[C0]+Power ON
NU1:
[METRONOME]+[RECORD]+[PLAY/STOP]+Power ON
Select Test mode No. 27 with [+]/[-] and execute [PLAY/STOP]
Checking method
Check that the K1 through K4 key positions detected by the key sensor are
heard as a sine wave (A5) tone on the headphones.
[Hammer sensor test mode (N3, N2, N1)]
Startup method
N3, N2, N1: [A-1] + [B-1] +Power ON
Check that the M1 ON and M2 ON positions detected by the hammer sensor
are heard as a sine wave (A5) tone on the headphones.
* The NU1 has no hammer sensor unit.
Task Description
(N3,N2,N1)
Chord; 2 taps
Let stand 30 seconds to
1 minute
Play only keys measured
Change measurement key
tone to 2 taps
Not necessary (Auto)
Set in state where all keys
2 tap measurement key
are not up and are depressed
tone
Depress damper pedal 1 time Change to 3 taps
Play measurement key to the
3 taps
end value
Depress damper pedal 1 time Change to 1 time/2 second tone Push the [PLAY/STOP] button Change to display "n_y"
Depress soft pedal 1 time
76[C] tone, sounds at
consecutive taps
Power OFF
release keys after 7 seconds
release keys after 7 seconds
Operating guide tones
(N3,N2,N1)
Start measurement mode
Let stand 1 minute to
2 minutes
Play only keys measured
Push the [PLAY/STOP] button Change to display "rSt"
Set in state where all keys
are not up and are depressed
Push the [PLAY/STOP] button Change to display "En"
Play measurement key to the
end value
Push the [PLAY/STOP] button Displays "PAS"
Power OFF
K1 (2.7 mm)
K2 (4.5 mm)
K3 (6.3 mm)
K4 (8.1 mm)
END
N3, N2, N1, NU1
Task Description
Screen display
(NU1)
Displays "1Ky"
Displays "1Ky"
Displays key no.
Displays "rSt"
Displays "En"
REST
(10 mm)
END
Continuous
M2
sound
10 mm
Continuous
sound
M1
REST
(NU1)
Continuous
sound
Discontinuous
sound
Continuous
sound
Short-cycle
discontinuous
sound
9