Test Set Up And Procedure - Infinity Beta SW Series Service Manual

CSW-10
CSW-10 Test Set Up and Procedure
SYSTEM AURAL SWEEP TEST
Equipment needed:
•
Function/signal generator/sweep generator
•
Integrated Amplifier
•
Multimeter
•
RCA cables
General Unit Function (UUT = Unit Under Test)
Switches/knobs on the amplifier faceplate:
Crossover Frequency Adjust full CW (150Hz)
Phase switch – either position
RABOS On/Off switch – OFF
LFE switch - Normal
1. Remove the subwoofer grille.
2. From the signal generator, connect both right and left line level inputs (RCA jacks) – to signal generator and
UUT. Use Y-cable if necessary from mono source.
3. On the amplifier, turn the LEVEL control full Counterclockwise (Min).
4. Turn on generator, adjust to 100mV, 50 Hz.
5. Plug in UUT; turn the power switch ON. Turn LEVEL control full Clockwise (Max).
6. LED should now be Green; aggressive bass response should be seen from woofer – near maximum
excursion.
Sweep Function
1. Follow steps 1-6 above, using a sweep generator as a signal source.
2. Sweep generator from 20Hz to 1kHz. 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 (Woofer)
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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