My Pioneer GM 5300t amplifier blows fuses all of the time. It says to have two 30 watt fuses in it and thats what i have yet they still keep on blowing. My subwoofer is a Pioneer TS-W302R Twelve-Inch
Do not continue to put new fuses into the amp until you have figured
out what is causing the problem. It will only increase the chances of
causing more damage to the amplifier. I have been repairing car and
home amplifiers for over 18 years and have a lot of experience with
Pioneer amplifiers since I work at an authorized Pioneer service
This post will be long, but if you bear with me and forgive my
long-winded answers you may be able to determain your problem even tho
I really don't have enough information to figure it out yet. If not, we
can get a little closer with more information.
Does the amplifier blow the fuse as soon as you connect power to it, or
as soon as a new fuse is put into the amp? If so, the amplifier has
some shorted components in the power supply. They have a bank of mosfet
transistors in the power supply that sometimes get shorted when the amp
has been pushed beyond it's ability, or just from a random part
failure, or if the impedance of the speakers is too low. Your speaker
is a 4 ohm speaker, if it is at a lower impedance than 3 ohms when
measured with an ohm meter then it will need to be replaced. Even if it
still plays, it is too low of a load for the amplifier and will cause
more current to go thru the amp than what it was designed for. If you
are using more than one speaker and have them bridged it will do the
same thing. This amp is rated at 4 ohms bridged and 2 ohms per channel
stereo. When you connect 2 speakers together and then bridge them they
become a 2 ohm load which causes double the amount of current to flow
thru the amp. It was not designed for that. Sometimes you can get these
component failures just because there may be a solder joint or two
inside the amplifier that is cracked and not making connection very well and this can cause components to short out because they are not operating at the proper voltage.
If your amp blows the fuse only after it has been turned on by your head unit, you will most likely have a blown channel. This would require the replacement of the output transistors of the bad channel as well as a few resistors and sometimes a few other parts.
If your amp will turn on and play for a while and then blow the fuse at higher volume levels or after a long time playing the problem can be either a bad speaker at a lower impedance or one or more components that are breaking down after they get hot or at a certain volume level.
As you can tell by now there are many reasons that an amplifier can blow the fuses, and figuring out just what the cause is can sometimes be a difficult task. It may require that you have a multimeter to do some checks on the amp and a power supply to power the amp on a bench so you can do those tests.
If this information has not helped you to determain the problem, please give me as much information as you can about how you are using the amp. How many speakers, where they are connected, at what point does the amp blow the fuse, and anything else that you can think of that may or may not be important. You never know what might give a better clue, too much information is always better than too little.
Thanks and good luck,
Nov 13, 2008 |
Pioneer Car Audio & Video