JBL Northridge E-Series E150P Service Manual

Also see for E150P: Owner's guide Owner's guide Service manual Owner's guide

Contents

TEST SET-UP AND PROCEDURESYSTEM AURAL SWEEP TESTEquipment needed:• Function/signal generator/sweep generator• Integrated Amplifier• Multimeter• Speaker cables1) Connect a pair of level input cables (RCA) from signal generator to either Right or Left Level input on UUT. LEVELcontrol should be full counterclockwise (MIN). Make sure the LFE/Normal switch is in the NORMAL position. Phaseswitch can be in either position.2) Turn on generator, adjust to 100mV, 50Hz.3) Plug in UUT; Turn Main Power switch ON. LED may be either Red or Green. Turn LEVEL control full clockwise(MAX). Low Pass control should be set fully clockwise (150Hz).4) LED should turn Green; immediately bass response should be heard and felt from port tube opening.5) Turn off generator, turn LEVEL control fully counterclockwise (MIN), disconnect RCA cables.6) Connect one pair of speaker cables to either high level input terminal on UUT. Cables should be connected to anintegrated amplifier fed by the signal generator.7) Turn on generator and adjust so that speaker level output is 1.0V, 50Hz. Turn LEVEL control full clockwise (MAX).8) Green LED should light, immediate bass response should be heard and felt from the port tube opening.Sweep Function1) Follow steps 1-4 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 othernoises. If any unusual noises are heard, remove driver and test.Driver Function1) Remove driver from cabinet; detach + and - wire clips.2) Check DC resistance of driver; it should be 5.8 ohms.3) Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier fed by asignal 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.13E150P/P10SW subwoofers