IL50 L/R
16
Test Set Up and Procedure
SYSTEM AURAL SWEEP TEST
Equipment needed:
• Function/signal generator/sweep generator
• Integrated Amplifier
• Multimeter
• Speaker cables
General Unit Function (UUT = Unit Under Test)
1. Remove the loudspeaker grille.
2. Switches on the amplifier faceplate:
Sub Input to "Line Level"
Low Pass Filter to OFF
Bass Optimization system to OFF
3. From the signal generator, connect one line level (RCA) cable to the Subwoofer Line Level Input jack
on the UUT.
4. On the front of the unit, turn the LEVEL control full counterclockwise (1).
5. Turn on generator, adjust to 50mV, 50 Hz.
6. Plug in UUT; turn the power switch ON. LED should be Red. Turn LEVEL control full clockwise (10)
7. LED should now be Green; immediate bass response should be heard and felt from port tube opening.
8. Turn off generator, turn VOLUME control fully counterclockwise, disconnect RCA cable.
9. Connect one pair of speaker cables to Speaker Level input terminal on UUT. Cables should be
connected to an integrated amplifier fed by the signal generator.
10. Switch Sub Input on the amplifier faceplate to "Speaker".
11. Turn on generator and adjust so that speaker level input at the amplifier is 1.5V, 50 Hz. Turn LEVEL
control full clockwise.
12. Green LED should light, immediate bass response should be heard and felt from the port tube opening.
Sweep Function
1. Follow steps 10-12 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 woofers and test.
Driver Function
1. Remove woofer from cabinet; 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.
Summary of Contents for IL50 L/R
Page 4: ...Detailed Specifications IL50 L R 4...
Page 5: ...IL50 L R 5 Detailed Specifications Cont...
Page 6: ...IL50 L R 6 Controls and Connections Cont...
Page 7: ...IL50 L R 7 Controls and Connections...
Page 8: ...IL50 L R 8 Controls and Connections Cont...
Page 9: ...IL50 L R 9 Controls and Connections Cont...
Page 10: ...IL50 L R 10 Operation Bass Optimization SystemTM...
Page 15: ...IL50 L R 15 Service Tips...
Page 18: ...IL50 L R 18 Packaging...
Page 19: ...IL50 L R 19 EMI Filter PCB...
Page 20: ...IL50 L R 20 Feature PCB...
Page 21: ...IL50 L R 21 Linear PCB...
Page 22: ...IL50 L R 22 Volume Control PCB...
Page 23: ...IL50 L R 23 Power Supply PCB...
Page 24: ...IL50 L R 24 RABOS PCB...
Page 25: ...IL50 L R 25 IL50 Electronic Parts List Part Reference Designator Qty Description...
Page 26: ...IL50 L R 26 IL50 Electronic Parts List Cont Part Reference Designator Qty Description...
Page 27: ...IL50 L R 27 IL50 Electronic Parts List Cont Part Reference Designator Qty Description...
Page 28: ...IL50 L R 28 IL50 Electronic Parts List Cont Part Reference Designator Qty Description...
Page 29: ...IL50 L R 29 IL50 Electronic Parts List Cont Part Reference Designator Qty Description...
Page 30: ...IL50 L R 30 IL50 Electronic Parts List Cont Part Reference Designator Qty Description...
Page 31: ...IL50 L R 31 Integrated Circuit Diagrams...
Page 33: ...IL50s 33 Feature Main Schematic...
Page 34: ...IL50s 34 Feature Main Schematic Cont...
Page 35: ...IL50s 35 Linear PCB Schematic...
Page 36: ...IL50s 36 250W Domestic Main Power Supply Schematic...
Page 37: ...IL50s 37 Feature RABOS Schematic...
Page 38: ...IL50s 38 Interlude Volume and EMI Filter Schematic...
