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New Edge Cobras
Mach 460 rear amps Fix (Also new cobra owner!)
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<blockquote data-quote="286rocks" data-source="post: 10132948" data-attributes="member: 111895"><p>Hi all, I just picked up a new to me 01 cobra last weekend, so far the car is a blast and I love it! However when I bought it the 2 rear amps were not working... like so many other stang owners from what I have been reading. :nonono: After doing all the normal checks, speaker impedance, 12v, turn on, etc. I decided to pop the amps open and take a look at the PCB. What I found is that resistor #808 was burnt in both amps. </p><p></p><p>Here is where the resistor is...sorry for the bad pictures, I didn't have a lot of light to work with.</p><p></p><p>[ATTACH=full]117667[/ATTACH]</p><p></p><p></p><p>[ATTACH=full]117668[/ATTACH]</p><p></p><p>Because I am so damn cheap and would like to keep the car as stock as possible I decided to try and fix them myself. The resistor is a 1/4 watt, 91 Ohm piece (color code: White, Brown, Black) and from what I could tell it had a 10% tolerance. The resistor was really burnt so I could barely make it out. </p><p></p><p>To fix it I took a trip down the the local Rat Shack and picked up a pack of 91 Ohm resistors, I decided to step up to some 1/2 watt pieces to keep them from just burning up again. These were a bit bigger and required some filing on the leads in order to get them through the PCB but they fit well. I also made sure that they had a 5% tolerance, instead of the 10% that the removed ones had. (You can tell the tolerance by the color of the forth band, Gold=5%, Silver=10%) </p><p></p><p>The soldering isn't too hard if you've had any time behind an iron, some good copper solder wick, and a solder sucker do make the job easier. </p><p></p><p>After I wrapped everything up and put the amps back together, I plugged them right in and BAM! I again had mids and lows! They've been working for a few days now with no signs of failure, but I'm keeping the rear seats down and keeping an open nose for burning smells just in case. lol. I know most people just rip the stocks amps out and replace them when they fail, but hopefully someone out there can make use of this.</p></blockquote><p></p>
[QUOTE="286rocks, post: 10132948, member: 111895"] Hi all, I just picked up a new to me 01 cobra last weekend, so far the car is a blast and I love it! However when I bought it the 2 rear amps were not working... like so many other stang owners from what I have been reading. :nonono: After doing all the normal checks, speaker impedance, 12v, turn on, etc. I decided to pop the amps open and take a look at the PCB. What I found is that resistor #808 was burnt in both amps. Here is where the resistor is...sorry for the bad pictures, I didn't have a lot of light to work with. [ATTACH=full]117667[/ATTACH] [ATTACH=full]117668[/ATTACH] Because I am so damn cheap and would like to keep the car as stock as possible I decided to try and fix them myself. The resistor is a 1/4 watt, 91 Ohm piece (color code: White, Brown, Black) and from what I could tell it had a 10% tolerance. The resistor was really burnt so I could barely make it out. To fix it I took a trip down the the local Rat Shack and picked up a pack of 91 Ohm resistors, I decided to step up to some 1/2 watt pieces to keep them from just burning up again. These were a bit bigger and required some filing on the leads in order to get them through the PCB but they fit well. I also made sure that they had a 5% tolerance, instead of the 10% that the removed ones had. (You can tell the tolerance by the color of the forth band, Gold=5%, Silver=10%) The soldering isn't too hard if you've had any time behind an iron, some good copper solder wick, and a solder sucker do make the job easier. After I wrapped everything up and put the amps back together, I plugged them right in and BAM! I again had mids and lows! They've been working for a few days now with no signs of failure, but I'm keeping the rear seats down and keeping an open nose for burning smells just in case. lol. I know most people just rip the stocks amps out and replace them when they fail, but hopefully someone out there can make use of this. [/QUOTE]
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