3
MDR-NC11
SECTION 2
ELECTRICAL ADJUSTMENT
NOISE CANCEL VOLUME ADJUSTMENT
Connection:
Procedure:
1. Generate a sine wave of specific frequency (250 Hz) from a
AF oscillator, and output it from a speaker placed at the for-
ward position.
2. Mount this set on the head, and turn on the [POWER] switch.
3. With this set mounted, adjust the RV1 (L-ch) and RV51 (R-
ch) so that the volume from the speaker becomes lowest au-
rally.
Note:
When the headphones are not covered with the ear pieces completely, the
adjustment may not be performed correctly.
Make sure that the ear pieces cover the headphone completely.
Adjustment Location:
– MAIN BOARD (Component Side) –
+
–
amplifier
speaker
AF oscillator
NOISE CANCEL RV51 (R-ch)
VOLUME ADJUSTMENT RV1 (L-ch)
S101
[POWER]
OFF
t
ON
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