I am having a problem with my amp i plug in my sub woofer and it shuts off a red light turns on saying diagnoses what do i do i also am having problems with my alpine stereo i cant watch dvds because of the saftey switches i just bought the car and it was turned on with a button and the lights but i could not figure it out so i un pluged it and dont know what to do
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Re: having problem with my amp
With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage drops below ~11 volts, you need to check the wiring feeding whichever line is too low.
If the voltage remains near or above 12v, disconnect all speaker wires and signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down, the amp likely has blown output transistors.
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It is hard to say. The sub-woofer has its own amplifier, although it is supplied the sound data from the main amplifier. It could have a problem with the battery power circuit (Sub-Woofer Amplifier Connector Pin 6, LIGHT GREEN/VIOLET) or it could have a problem with the GROUND circuit (Pin 2, BLACK/LIGHT GREEN) Or it could possibly not be receiving the signal from the main amplifier (Pin 7, BROWN/ORANGE "+"), (Pin 8, RED/BLACK "-"). Or it could be that either the sub-woofer speaker is blown, or the sub-woofer amplifier is defective. There is also a "High Audio Mute" circuit that connects between the main amplifier and the sub-woofer amplifier.
hi, if u want to hook up the sub with ur av receiver the connect the sub woofer output of ur AVR to any one (left or right) input of ur sub woofer. then connect its power . set the frequency range between 90 and 120Hz. set the volume of sub woofer to 40% of its total. also check the av receives speaker setting. goto speaker setup and make ON the sub woofer out.
if want to connect the sub to a stereo amp without sub out. then connect the amps speaker line to the speaker input of sub woofer and connect the speaker out of sub to left and right speaker ( make sure to connect the red to red and black to black). set the volume and frequency as above ok
henrylshelt, Your sub should turn on into standby mode when plugged into AC power without being attached to the receiver. If it does not follow the list below. If it does, the sub needs a signal from your receiver via either by line-level (RCA) or the speaker wires to turn on out of standby. Ensure that the cable or wires going to your sub is in fact sending a signal while the receiver is on. To Test, (speaker wires) hook up a different known working speaker; (line-level) Some receivers have a menu option to turn the LFE output on and off, ensure that it is on and producing a signal.
Diagnose the problem: 1) Remove all wiring to/from the unit except for the AC plug (use a different known working AC outlet), will it turn on? If so the other outlet is not working. 2) Remove the woofer, does the amp have a fuse that need to be changed? Change the fuse. If it blows again after replacing and turning back on, the speaker is blown; go to #4. 3) Unplug the woofer from the amp, does it turn on? If so, go to #4. 4) The sub need to be serviced. http://www.jbl.com/EN-US/Support/Pages/SupportOverView.aspx
The DXZ375 has two sets of RCA outputs (1 red plug, 1 white plug) located on the back of the unit. The set with the white main wire is for a front amplifier, and the one with the black main wire is the rear. You want the black one.
I'm assuming you also have an amplifier for your subs and the necessary wiring. You will need to run a 12v+ from the battery to the amplifier, splice a power-on signal wire from the ACC Power wire on the stereo's wiring harness (red wire) as well as connect the amp to the stereo via the RCA outputs.
Has nothing to do with the signal or source - it is a failure of the turn on circuit - I repair this amp - can help if you find my add here or I am located on ebay as well. Juust do a search for We Repair JBL and find the model :)
You may have a defective speaker or a wiring fault. Disconnect the speaker from the amp and measure the resistance across the speaker wires. The resistance should be near the rated impedance of the speaker.