Ok i'm having a little problem with this amplifier. it started when a ground wire that travels from the chasis of the amplifier to the PCB came off the PCB and shorted 4 IRFZ46 transistors causing those 4 transistors to smoke. so i have replaced those transistors and have also replaced 5 2200uF 25v Capacitors in this unit as the tops were bulged. now the unit powers up as the power LED lights up. now here's where the fun begins, if i leave the Amplifier in Stereo mode i can't get any sound through the unit and the protection light comes on. now if i bridge the unit and go to Mono the protection light shuts off, but still get no audio through it(exept for a loud hum) and this happens on all 4 channels. if you can think of anything that would help my cause it would be greatly appreciated.
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Re: No Audio From Amplifier
I would first check for "rail votage" at the rectifiers...
If all of your audio transistors are not getting around 40 volts then check the transistors you replaced. They should be getting a 5 volt (10 volt square wave is checked with a scope) "drive" signal. If half of your power supply transistors are not getting a drive signal then replace the kia494/tl494/kia594/tl594---whatever it is. thats the ic chip that supplies the "drive" signal to the power supply transistors. Also follow the board closely out of the power supply transistor to the 494 chip.. there should be some small driver transistors in between.. make sure they are not shorted or fried as well... let me knoe if you need more help
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If your Dual Car Amp refuese to switch ON check the following.
+12V wire is not connected or incorrect voltage.
REM wire is not connected or incorrect voltage.
Ground wire is not connected.
Fuse(s) are blown.
If the fuse blows repeatedly, check whether the +ve voltage wire touche the chasis of the vehicle. If it is OK, the fault is with the univt itself. That is, the output of the unit has a short. Check for any output IC failure. OK.
In car audio always make sure that you are feeding your amplifier with the voltage that it requires, usually 12v to 14v (some amplifiers can do 12v to 18v). If you have a voltmeter, check your voltage reading if its reading 12v above, if it reads 11.9v below & just stays there & keeps on going down then your problem is with your voltage.
The possible causes of the protect light to turn on in a amplifier is:
1. low voltage - the amplifier is not running on its required voltage / is not getting enough voltage
2. thermal protect - too much heat, usually this occurs when an amplifier is in a tight space & the voltage keeps going down this will cause heat.
3. shortage - wire's are touching each other
4. poor ground - always make sure you ground your amplifier to your vehicles chasis
Hope this helps your concern. Have a blessed weekend.
Check your ground and power wire connections. It will most likely be a bad ground, if grounded in the trunk, get a longer wire of equal or greater thickness and ground to either chassis or battery. Also if you have the amp at full gain try dropping it a little back if getting a better ground doesnt help
It's drawing too much current. make sure you have a nice solid ground to your car chasis( i use seat bolt or something like that) and that your wire is the right gauge. If it's still popping your fuse make sure you are wiring the subs as specified by the manufacturer.
could be power, could be ground, do you have a factory amplifier aswell as an aftermarket one in your vehicle.. If so if you have the 3 remote wires spliced together to kick on your factory amp you can have problems with this. Basically having more than 1 amp wired in series together can do this... there are many factors to this but first check your ground on the headunit and make sure it's makin a good chasis ground..
Check your amps ground and make sure it has a clean connection to the chasis. If there is paint or any kind of coating where you are trying to ground, use a steel brush to expose the bare metal. Also, make sure you are grounding the amp directly to the chasis and not to another grounded wire.
are you shure you not connect the amplifier in a wrong connection ...B+,GND,ACC.....ok...then checkif the speakers wires stay in good condicions, some times when we intalled the spk wires for the border of the doors a few times skrewered too.check if it hapen.
another ....check if the terminal spk is not going at ground whit the chasis
another to....4 ohms per channel ,anny voice coil spk burned...in short.