Infinity Classia Series Service Manual page 13

PSW310W subwoofer Classia Series
General Unit Function (Direct connection - No Transmitter)
9) From a mono output signal generator, OFF at this time, connect an RCA cable to the L/R jacks on the
PSW310W Subwoofer; Use a Y-cable to connect to both inputs; power switch should be OFF.
10) PHASE switch position does not matter. CROSSOVER control should be set at "150Hz". Low Pass switch
position does not matter. RABOS On/Off switch should be OFF.
11) Turn the LEVEL control on the UUT to completely counterclockwise (MIN).
12) Turn on signal generator; adjust to 125mV, 50 Hz.
13) Turn the power switch ON. LED on top of Subwoofer should be momentarily Red, then Green.
14) Turn LEVEL control full clockwise (MAX); immediate and vigorous bass response should be heard and felt
from port tube opening on the bottom.
15) Turn off generator, turn LEVEL control full counterclockwise (MIN), and disconnect RCA cable.
Sweep Function
1) Follow steps 9-14 above, using a sweep generator as a signal source.
2) Sweep generator from 20Hz to 300Hz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or
any other noises. If any unusual noises are heard, remove woofer and test.
Driver Function
1) Remove woofer from cabinet; detach + and - wire clips.
2) Check DC resistance of woofer; it should be 3.4 ohms ±10%
3) Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier
fed by a signal generator. Turn on generator and adjust so that speaker level output is 5.0V.
4) Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.
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