Question about JVC KS-AX4700 Car Audio Amplifier

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JVC KS-AX4700 doesnt work

My JVC KS-AX4700 no longer works. When it is hooked up, very little power comes out (meaning subs barely hit, but some noise is heard). I have it apart, and I would love to fix it myself. Can someone help me out as to what the common parts that go are? What should I look for? Is it OK to dissassemble the board from the casing? Is it possible that there is still electricity stored in it (it was "undone" more than a month ago)? Any help would be appreciated. I am good at technical things, although I have very little electronics experience.

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Re: JVC KS-AX4700 doesnt work

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Posted on Aug 17, 2006

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My jvc ks-ax4302 goes straight to protection when I turn it on, just curious what could be the cause and where could I find a schematic of the mother board?

If the Power/Protect LED is red, usually the speaker wiring has a short-circuit or the speaker total impedance is wrong for the system. The most common issue is a bare spot on a speaker wire that is coming in contact with part of the car or another bare wire. Sometimes, it just means that the system got too hot.

Before you look for a problem with the KS-AX4302 board, look at your wiring and replace any damaged wires.

I hope this helps.

Cindy Wells

Apr 11, 2015 | JVC Car Amplifiers

1 Answer

Everything is hooked up fine. the amp has power but no sound. I opened the amp and nothing looks burnt out.

Try you sub(s) on another amp...if they play off of it then its either your speaker outputs off of the amp or your rcas or wire from your radio are bad.

Nov 15, 2010 | JVC KS-AR7501D Car Amp

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My jvc ax6300 amp is wired in and the protection light is on. no sound from the subs?

Try to rest amp (turn off power) be sure subs are disconnected. Se if protection light comes on. If it does the amp needs to be serviced porbably a burnt component. If the protection light does not come on, connect one sub at a time to see if either one surges. Could also be that the gain is turned up too much.

Nov 06, 2009 | JVC KS-AX6300 Car Audio Amplifier

2 Answers

Hits hard with one sub but has no bass with 2

do you no what ohm your amp can do and what your subs are

Oct 07, 2009 | Lanzar VIBE286 Car Audio Amplifier

1 Answer

Jvc ks-ax4500 will not stay on.

check the remote terminal for a dissapearing should stay at +12vdc for all the time it is ON. hope it helps.

Oct 14, 2008 | JVC KS-AX4500 Car Audio Amplifier

1 Answer

Sony amp 1000w

Check the wiring of the speakers (both inside the box and between the box and the amp). It sounds like one speaker is wired incorrectly at one connection point.

Sep 09, 2008 | Sony Xplod XM-1652Z Car Audio Amplifier

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It sounds like you have blown your Output amplifier MOSFETs (Metal Oxide Semiconductor Field Effect Transistors) You will see some components with metal tabs, these are some of those along with some secondary stage pre driver transistors also screwed to the metal case (heat sink). Ok you will need some pieces of equipment. First you will need a schematic of the unit (never work without a schematic), second you will need a volt ohmeter (yes I am old) you might call it a multimeter. Now this is the bare minimum of equipment you need. first open ope the scematic and find the main voltage rails and test points, these will be important as you traces the source of your problem down. I want you to take measure ments of the test points and compare them to the measurements in the schematic, the places where the diffences are dramatic are the places the problem may be. remeber take these measurements and compare them to the schematic and then try to isolate the problem down to the components that are truly bad. Also pick up a book on how to repair audio amplifiers. This is the best I can do over the internet, happy hunting my friend.

Aug 17, 2006 | JVC KS-AX4700 Car Audio Amplifier

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