Bose PANARAY 620M Посібник з експлуатації - Сторінка 15
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Також для Bose PANARAY 620M: Посібник з монтажу (4 сторінок)
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1. Phase Test
1.1 Observing polarity, momentarily apply a
12VDC level to pin 1+ and 1- of the Neutrik
NL4 connector.
1.2 While applying the DC voltage, observe
the drivers. They should all move outward
when the voltage is applied. Correct the
wiring on any drivers that move inward
instead of outward during this test.
2. Rub and Tick Test
2.1 Apply a 10Hz, 20Vrms signal directly to
the terminals of the driver under test. Refer
to the disassembly procedures in this
manual for the speaker under test to find out
how to remove the driver.
2.2 Listen for any extraneous noises such as
rubbing, scraping or ticking.
Note: To distinguish between normal sus-
pension noise and rubs or ticks, displace the
cone slightly with your fingers. If the noise
stays the same, it is normal suspension
noise and the driver is fine. Suspension
noise will not be heard with program mate-
rial.
TEST PROCEDURES
15
3. System Sweep Test
3.1 Apply a 10Hz, 20Vrms (310M speaker)
or 30Vrms (620M speaker) signal to pin 1+
and pin 1- of the Neutrik NL4 connector.
3.2 Sweep the audio signal generator from
10Hz up to 70Hz.
3.3 Verify that there are no extraneous
noises such as buzzes or rattles.
4. Air Leak Test
4.1 Apply a 70Hz, 20Vrms (310M speaker)
or 30Vrms (620M speaker) signal to pin 1+
and pin 1- of the Neutrik NL4 connector.
4.2 Listen for any air leaks around the rear
panel, input panel, woofer and handles.