Question about Rockford Fosgate Punch 401S Car Audio Amplifier

Open Question

No power, no light, no sound on rockford fosgate 401s amp. I was wondering if there is a fuse that may have blown but the one in the engine connecting to the power wire is fine and when i opened it up there is no fuse inside. what could be the problem and how can i fix it? thanks

Posted by on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
icansurf
  • 72 Answers

SOURCE: My amp is blown!! Dont know what part to replace.

those are likely "chips" or "integrated circuits". can you read any words, letters, numbers off it? if it's a common off-the-shelf chip you can buy from mouser.com or digitek.com, AND if you know how to de-solder and solder delicate electronic components using a hot soldering iron WITHOUT destroying them or the adjacent components. if no identifying codes on the chip, maybe google up a schematic of the board (unlikely) and figure out what it is. if it's a proprietary chip made Rockford Fosgate, it will be harder to find. Also, there could be damage to OTHER components that may not be visible, so if you go to all this trouble it might still not work and then you'd have wasted money. hopefully you are under warranty and RF can repair it. otherwise, chunk it in the nearest trash can.

Posted on Mar 06, 2007

Ad
blueextc3221
  • 15935 Answers

SOURCE: 401s Rockford Fosgate Amp. Not

Amp Failure:
There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause. If the fuse protecting the amp is too large, if the protection circuit doesn't respond quickly enough or if the power supply is poorly designed, the power supply transistors may fail. If you see a lot of black soot on the power supply transistors (near the power transformer), the power supply transistors have failed. Soot on the board doesn't necessarily mean the transistors have failed. Sometimes, technicians don't clean up the mess from a previous failure. Transistor Failure/Checking Transistors:
In general, when a transistor fails, it will either short (common for output AND power supply transistors) or open (common for power supply transistors). Transistors act like valves. They control the current flowing through a circuit. A shorted transistor acts like a valve that's stuck open (passing too much current). In the case of an output transistor, the shorted transistors tries to deliver the full rail voltage to the speaker output terminal. If you've ever seen a damaged amp that pushed or pulled the speaker cone to its limits when the amp powered up (common on some Rockford amplifiers), that was almost certainly due to a shorted output transistor. When checking transistors, you most commonly look for shorted connections inside the transistor. You do this by using a multimeter to look for low resistance connections between the transistor's terminals. Note:
I used the terms short and open on the previous paragraph. A short (short circuit) is a path through which current flows that should not be there. An open (open circuit) is a break in the circuit.

These repairs are best left to a repair tech familiar with car audio amplifiers. Check with your local shop to get a reccomendation. If the light isnt even coming on, chances are your input or power supply has been taken out.

Posted on Jan 01, 2009

laseramp
  • 313 Answers

SOURCE: 401s Rockford Fosgate Amp. Not powering on,just protect lite is on.

the problem is mostly with your audio side of the amp. i have a 800 Rockford punch series amp hooked in series running at about 15 vdc at 2 ohms stable for now. but the amps left front power side transistors overloaded and smoked out, i will be replaceing my mosfets soon. Now on that side your issues apear to be related to the signal side of the amp. when you hooked the amp up tell me breifly did you hook the rca inputs to the back of the sterio and did you select the proper rca inputs for the amp? also note that amps have a potentiomater that can be tuned up or down to allow the volume or wattage to go up or down threw the system. if it's turned all the way down you'll here nothing. but often you'll get a pop sound or quickly see the speaker move a bit. this indicated the signal side of the amp has signal comming in but no output, just look for a turnable small screw inside the amp top or side. and turn up acordingly. note: to much output will damadge your system. not just the amp. ;)

Posted on Aug 28, 2009

joshter32
  • 82 Answers

SOURCE: wire my rockford fosgate rf2002 amp and 12"sub to cobalt

Hi my names Josh. I see you want put your rockford amp in. Assuming you have your factory radio you have some wiring to do. But first you need and amp kit it wil have the necessary wiring you will need in it to wire your amp to your car. You will also need a line level converter they you can pick on up at best buy other wise known as a pac converter. This will alow you to transfer the high level frenquency your radio puts out to a low level frenquency to go strait to your amp through a pair of RCA's thus giving you sound to your amp and then to the sub. Your wiring will consist of the ground which you will have to ground off the vehicles chasis no more than a foot from your amps designated location. Then you have you power 12v which is about a 4 gauge wire and will be fuzed and ran strait to the positive side of your battery and last will be your remote wire. Your amp will have a place marked remote on it that is strickly for you to wire to your radio/ignition source for powering the amp up when radio is on and powering it down when it is off. YOU MUST ISOLATE THAT WIRE with a 12 volt tester it will be the wire that is tied in to your radio to power only when your igniton is on and when you turn your key it should tell you if you know how to properly check for this wire. wants you istolate this wire you will want to tie into to it and then of coarse run it and tie it into your amps remote power again it will be marked remote on your amp. From there all you have left is tying in your line level convererter.. This takes some patience as you must make sure that you do isolate your sound left and right postive and negetive front and rear channels the line level converter will tie into either your front or rear channel but caution you dont get them mixed or you will not have a signal at all. Again my names Josh and i hope you are able to get it hooked up okay.

Posted on Mar 07, 2010

  • 733 Answers

SOURCE: rockford fosgate p 300-1 amp will not turn on

plug your ground, battery, and remote wires only and see if it turns on when you turn your radio on, if not it must have blown. wiggle or move the connection block(where your wires are connected) and see if it tries to turn on. if so, your leads need to be re-soldered since they tend to go cold(they're not making good contact). But again, if that does not help, then your amp is gone.

Posted on Mar 18, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

No power,no red light,but has power going to it,just cut off


Sorry to say but it's usually a blown resistor and will have to be taken in to get fixed. Just be positive that your ground has a good connection, your remote is powered, and no fuses are blown, people have missed this stuff (mostly the ground) a lot. My amps have been between 50 and 150 to get fixed, sometimes it's worth it, other times not, kinda up to you. Good luck.

Mar 18, 2010 | Rockford Fosgate Punch 401S Car Audio...

1 Answer

Amp not working


It sounds like you either blew a fuse, or you cooked your amp. The fuse on the P200.2 amp is a 30A fuse, and it sits right next to the power, ground, and remote wire connections on the end. Pull the fuse out and see if it's blown. You should also check any other fuses that you have in the car before the amp.

Mar 03, 2010 | Rockford Fosgate Punch P2002 Car Audio...

1 Answer

What is the auctual watts fpr the Rockford Fosgate Punch 401S?


rockford fosgate doesnt have watts its considered monoblock it gives off watever the speakers want....it gives them the power they need

Dec 29, 2009 | Rockford Fosgate Punch 401S Car Audio...

1 Answer

Does the Rockford 401s amp have a fuse?


Yes. Rockford fosgate has a cover over all of the connections, crossovers, and various other controls. Just remove the cover with the allen wrench they sent with the amp or find a set of allen wrenches if you don't have one. Under this cover you'll find what you're looking for.

Nov 28, 2009 | Rockford Fosgate Punch 401S Car Audio...

2 Answers

When i started to plug my battery in my amp made


you have blown the actual filters that make the sound. a amp is basically a filter with the same filters on both channels on each side of the inside of the amp - channel 1 and channel 2, that pop was in the heat sinks of the amp usually. if you have replaced the fuse in this amp and you get no on light, the internal amp is in need of repair

Oct 24, 2009 | Rockford Fosgate Punch 401S Car Audio...

3 Answers

401s Rockford Fosgate Amp. Not powering on,just protect lite is on.


try hooking the remote wire to a rem wire on the back of stereo. post and let me know results

May 30, 2009 | Rockford Fosgate Punch 401S Car Audio...

1 Answer

Rockford Punch HE2 wiring question.


if your sub will handle it, bridging it will give you more power. The best thing to do is to find out how much power the amp puts out ( RMS ) and if it is in your power handling range bridge it. It sounds better and gives you a harder punch because of more power.

Feb 05, 2009 | Rockford Fosgate HE2 RFP4212 Car Subwoofer

1 Answer

Rockford Fosgate Punch 401s starts then smokes


Can somebody email me the schematic for the Rockford Fosgate 401S?

Feb 04, 2009 | Rockford Fosgate Punch 401S Car Audio...

1 Answer

I think my ex blew my amp


model number? im thinking 401s? if so that should be the only light on

Aug 07, 2008 | Rockford Fosgate Punch P5002 Car Audio...

Not finding what you are looking for?
Rockford Fosgate Punch 401S Car Audio Amplifier Logo

Related Topics:

395 people viewed this question

Ask a Question

Usually answered in minutes!

Top Rockford Fosgate Car Audio & Video Experts

seankane89

Level 1 Expert

27 Answers

Tygh Duval
Tygh Duval

Level 2 Expert

300 Answers

Professor_V
Professor_V

Level 2 Expert

92 Answers

Are you a Rockford Fosgate Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...