Technics SX-KN7000EB, Руководство по обслуживанию, Страница: 35 / 160

Fig.32
1. Generate a full amplitude sine wave in the pitch of each key. (No touch, fixed stereo
center).
If no sound is generated or if the sound is distorted, the sound generator ROM
corresponding to the key position is defective.
2. For confirming the output pathway from the sound generator. (Fixed scale, no touch)
The Lch and Rch sound outputs are confirmed separately.
3. Generate a full amplitude sine wave in the pitch of each key +2 octaves. (No touch,
fixed stereo center)
By generating a sound frequency outside the normal keyboard zone, you can
confirm whether or not there is an abnormality in the sound output frequency zone.
4. Generates a full amplitude sine wave in the pitch of each key -2 octaves. (No touch,
fixed stereo center)
By generating a sound frequency outside the normal keyboard zone, you can
confirm whether or not there is an abnormality in the sound output frequency zone.
5. Generate a sine wave in the pitch of each key with touch.
You can confirm if the volume changes depending on the touch.
6. Generate a full amplitude sine wave in the pitch of each key at a -16 dB volume. (No
touch, fixed stereo center)
You can confirm the same sound output as in 1, at a lower volume.
8.11. SD test
Fig.33
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