Mach sub amp problems
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From: Only the govt. knows
Mach sub amp problems
How's it going everybody? My first thread, so wish me luck. Anyway, on to the problem.
I have a 01 Eddie Bauer Expedition that I've owned for about 2 months now. Since the day I bought it, there was no sound coming from any of the speakers. I replaced the stock HU with a Pioneer deck, and the appropriate harness from Crutchfield (Here's the link to the harness), and got sound from the door speakers, but not the sub.
I then decided to pull the sub amp out and take a look at the circuit board. Once I opened it up, I noticed that one of the voltage regulators (the black square looking things with 3 legs on a circuit board for those of you that don't know) was cracked in half. I soldered in a new one, then reconnected the amp. Still now sound, but now the amp starts warming up and I'm lost at this point.
I want to keep the factory setup, but I'm not looking at the aftermarket enclosures as an option right now nor do I want to fork out a boat load of money to the stealership for a replacement if the amp isn't the problem. So any of you guys have any suggestions?
I have a 01 Eddie Bauer Expedition that I've owned for about 2 months now. Since the day I bought it, there was no sound coming from any of the speakers. I replaced the stock HU with a Pioneer deck, and the appropriate harness from Crutchfield (Here's the link to the harness), and got sound from the door speakers, but not the sub.
I then decided to pull the sub amp out and take a look at the circuit board. Once I opened it up, I noticed that one of the voltage regulators (the black square looking things with 3 legs on a circuit board for those of you that don't know) was cracked in half. I soldered in a new one, then reconnected the amp. Still now sound, but now the amp starts warming up and I'm lost at this point.
I want to keep the factory setup, but I'm not looking at the aftermarket enclosures as an option right now nor do I want to fork out a boat load of money to the stealership for a replacement if the amp isn't the problem. So any of you guys have any suggestions?
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That isnt a voltage regulator. It is a transistor. If you did not replace it with the correct transistor you arent going to get any sound from the amp. Just buy a new cheapie amp with high level inputs and hook her up.
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From: Only the govt. knows
Originally Posted by CBFryman
That isnt a voltage regulator. It is a transistor. If you did not replace it with the correct transistor you arent going to get any sound from the amp.
Regardless, when the guy at Radio Shack tried to cross reference the numbers on the broken transistor (BTW, there's 2 of the same one right next to each other), he couldn't get anything to match to the one I was replacing, so I grabbed a few different ones and rolled the dice. If the transistor I soldered in is the wrong one, I guess I'm just going to have to keep guessing until I get it right, or someone that knows can lead me in the right direction.
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Originally Posted by CBFryman
That isnt a voltage regulator. It is a transistor. If you did not replace it with the correct transistor you arent going to get any sound from the amp. Just buy a new cheapie amp with high level inputs and hook her up.
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Welcome to FTE crackerteg. Im glad you chose the best site on the net for Ford-Trucks. See you around the boards!
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From: Only the govt. knows
Originally Posted by tvsjr
It very well could be a voltage regulator... a 7805 or something to drive the logic. Just because it's got three legs doesn't mean it's a transistor.
BTW, transistor/ voltage regulator, would be the same deal. I googled transistor and got this definition for it. The one I replaced looks identical to the one in the picture that's all the way to the left.
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Originally Posted by tvsjr
It very well could be a voltage regulator... a 7805 or something to drive the logic. Just because it's got three legs doesn't mean it's a transistor.
I'm not being an ***, I'm asking.
Most amps (especailly OEM ones) dont need any sort of voltage regulation. The amplifier part is built in reletivele high tollerance and the power supply is generally just a step up transformer working at extremely high switching speeds (50,000Hz +). Amps do, however, use transistors to form a wave in pairs. Transistors can also be used as a form of voltage regulation so perhaps that is where the radio shack guy went wrong.
As far as a "Cheapie" amp. What are the dimentions? Im sure I can find one for ~$50 of equal or greater quality to fit your needs.
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