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INFINITY SUB450
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of INFINITY SUB450 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 10 (click to view)
SUB450

Test Set Up and Procedure

Equipment needed: � Function/signal generator/sweep generator � Integrated Amplifier � Multimeter � Speaker cables General Unit Function (UUT = Unit Under Test) 1) From the signal generator, connect one line level (RCA) cable to the Subwoofer Line Level Input jacks L/R on the UUT. Use a Y-cable from a mono source if necessary to connect to both inputs. Do not connect to the single LFE input. 2) On the front of the unit, turn the LEVEL control full counterclockwise. 3) Turn on generator, adjust to 100mV, 50 Hz. 4) Plug in UUT; turn the power switch ON. LED should be Red. Turn LEVEL control full clockwise (MAX) 5) LED should now be Green; immediate bass response should be heard and felt from port tube opening. 6) Turn off generator, turn LEVEL control fully counterclockwise, disconnect RCA cable. 7) Connect one pair of speaker cables to Speaker Level input terminal (IN) on UUT. Cables should be connected to an integrated amplifier fed by the signal generator. 8) Turn on generator and adjust so that speaker level input at the amplifier is 2.0V, 50 Hz. Turn LEVEL control full clockwise. 9) Green LED should light, immediate bass response should be heard and felt from the port tube opening. Sweep Function 1) Follow steps 7-9 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; detach + and - wire clips. 2) Check DC resistance of woofer; it should be 3.3 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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