Bose 601 II DIRECT/REFLECTING, Руководство по обслуживанию, Страница: 5 / 11

4
601™ II TEST PROCEDURES
1. Sweep Test
1.1 Apply a 10Vrms, 15HZ signal to the
input terminals of the speaker.
1.2 Sweep the oscillator from 15HZ to
2.5kHZ. There should not be any loud
extraneous noises coming from the woofer.
Note: The woofers are wired in series. If
one woofer is open the other one will not
work.
1.3 Sweep the oscillator from 1.5kHZ to
15kHZ. Replace any tweeter that is inop-
erative or buzzing.
2. Rub and Tick Test
2.1 Apply a 10Vrms, 25HZ signal to the
input terminals of the speaker.
2.2 No extraneous noises such as rubbing,
scraping or ticking should be heard.
Note: To distinguish between normal
suspension noise and rubs or ticks, dis-
place the cone of the driver slightly with
your fingers. If the noise can be made to go
away or get worse, it is a rub or tick and the
driver should be replaced. If the noise stays
the same, it is normal suspension noise
and it will not be heard with program mate-
rial.
3. Air Leak Test
3.1 Apply a 10Vrms, 40HZ signal to the
input terminals of the speaker.
3.2 Listen for any whooshing sound com-
ing from the cabinet or around the woofer.
Repair any air leaks.
4. Phase Test
4.1 Momentarily apply 10VDC to the input
terminal of the speaker. Observe the
polarity when connecting the DC supply.
4.2 The woofer should move outwards with
the momentarily applied DC voltage.
4.3 Visually check the tweeters wiring to
ensure proper phasing.