Hi! In a fast food electronics service, you only have to check from the bad part connections to the stage before. But in real life, you must check everything to find what is bad, and later to find the origen of the problem
hello bob. i did as you did on my logic 7 n channel transistors. i removed and used diode tester and when i had negative lead on drain and positive on source, i moved the pos to the gate and went back to the source and it was low, but not zero. it did this on 2 of the subwoofer transistors left and right. is that normal to be sitting at 22 mv and not zero?
How can i find out if my logic7 is my problem? I have no sound on my speakers and sometimes i cant change the station or move anything on the screen. Idk how to test the L7
Hi! Some times I get things to fix from my friends. But most of the time it is better to look for local market services. Example; if you are in America, the shipping and the importation tax are higher that the product to fix. After sent and imported the cost of the service, parts, shipping back must be added to it. (Some countries require importation tax too, even when the part was a shipping from the same origen before). There is always a chance it is not fixable, o yes, it can be repaired but the source of the problem is not the amplifier and is a defective speaker or car's voltage regulators and the amplifier will fail again after repaired. It is the reason why it is good to be serviced locally, in order to find issues like the source of the problem or parts for European, Asian or American models if it applies too. I was repairing things to survive when I moved to Europe, but now that I got the equipment I needed, I am focused in electronics designs full time and recording videos about electronics repairing using equipment from sponsors. Does the amplifier or the car itself, have some sentimental value for you in order to do not replace it?
I have a amp for e92 m3 individual audio. Currently the mid speakers(which is located rear seat) is not working... what will I have to check? And.. also.. do you do repair service?
Hi! Always the first thing to check is the speaker. If speakers are bad, we can fix the amplifier and it will come back bad again. Fist test is the speakers OHMs, and the 2nd is if it gets in short circuit after heating. I have a repair service in Europe.
Hey , I have a problem with one of my speaker from right side front . It doesn't work , but the speaker I check it already to another car . The copasator looks good all of them ... so I really don't know what should I do ... can you please help me ?
HI Bob Great video! Thank you for posting this with such great detail and information. Can you try to help me? I have A BMW E60 M5 2008 with logic 7 Amp. The sound is working and the bass is working, but the quality of the sound does not sound correct as it did a few years ago so i must compensate by using the equalizer. Even with adjusting the equalizer the sound still does not sound as it should. Could this be an amplifier problem or something else?
Hi I need to know where I can find this transistors 269-3RD2f7 from my Logic 7 Amplifier for BMW 745LI, also where I can find the 4 chips to replace. Thanks
Yea hi I have a 2007 BMW e92 335i , My bass to my sound doesn't come on , I was playing around with the aux port that's in the middle console of the car and it started working for 2 min and cut out again , if it was my aux port would that make myRadio bass stop working too ?
Hi Jon! It was easy to open, other ways I must show the tip for it. It was already a 24 minutes video to make it longest. The mayor issue could be to remove it from the car. But at the end of the day, I thought it didn't require special tip for it too. But you are right! To make a video about how to remove it from the car could be a very good instruction for people to be able to bring it to electronics service or to replace it with other second hand. I will give you a like, because I miss that good instruction for car owners.
You are right. This is a task for a modern workbench. This kind of fixing requires more than a DMM, and some schooling, oscilloscope, LCR-T4 tester and hot air rework station is needed for it. Technology requires more knowledge and maybe specialization in specific areas to deal with. But also education is on liine, and the sophisticated equipment is becoming a common resource that many people can get. (It was not the same situation 20 years ago, when to get equipment was limited to the ones with high budget). :-)
I have no bass plus a popping noise on passenger side door speaker at higher volumes
I have the same issue, did you ever figure it out?
can you put electrical circuit fot testing the capacitor in description thanks.
Having the same problem no bass and also my Bluetooth for my phone cannot hear anything
What are the troubleshooting steps when there is no bass? What should I check or replace first on the boards?
Hi! In a fast food electronics service, you only have to check from the bad part connections to the stage before. But in real life, you must check everything to find what is bad, and later to find the origen of the problem
Hello, could you please share where did you buy the mosfets and was it HUF76113T3ST?
looks like I’m buying a new amp :/
just take a 6 month course with a focus on circuit board diagnoses and repair and fix it. lol
@@gedguideguy9911 I'm with him in that guy but he brought another amp I'm switching mines out soon I wanted to find somebody to fix my damage one
hello bob. i did as you did on my logic 7 n channel transistors. i removed and used diode tester and when i had negative lead on drain and positive on source, i moved the pos to the gate and went back to the source and it was low, but not zero. it did this on 2 of the subwoofer transistors left and right. is that normal to be sitting at 22 mv and not zero?
How can i find out if my logic7 is my problem? I have no sound on my speakers and sometimes i cant change the station or move anything on the screen. Idk how to test the L7
Would you be able to fix my amp if I sent it in.
Hi! Some times I get things to fix from my friends. But most of the time it is better to look for local market services. Example; if you are in America, the shipping and the importation tax are higher that the product to fix. After sent and imported the cost of the service, parts, shipping back must be added to it. (Some countries require importation tax too, even when the part was a shipping from the same origen before). There is always a chance it is not fixable, o yes, it can be repaired but the source of the problem is not the amplifier and is a defective speaker or car's voltage regulators and the amplifier will fail again after repaired. It is the reason why it is good to be serviced locally, in order to find issues like the source of the problem or parts for European, Asian or American models if it applies too.
I was repairing things to survive when I moved to Europe, but now that I got the equipment I needed, I am focused in electronics designs full time and recording videos about electronics repairing using equipment from sponsors.
Does the amplifier or the car itself, have some sentimental value for you in order to do not replace it?
I have a amp for e92 m3 individual audio. Currently the mid speakers(which is located rear seat) is not working... what will I have to check? And.. also.. do you do repair service?
Hi! Always the first thing to check is the speaker. If speakers are bad, we can fix the amplifier and it will come back bad again. Fist test is the speakers OHMs, and the 2nd is if it gets in short circuit after heating. I have a repair service in Europe.
Is it possible to repair a waterdamaged unit?
Hey , I have a problem with one of my speaker from right side front . It doesn't work , but the speaker I check it already to another car . The copasator looks good all of them ... so I really don't know what should I do ... can you please help me ?
@bob ,would you repair this amp for me and if so how much would you charge me?
HI Bob Great video! Thank you for posting this with such great detail and information. Can you try to help me? I have A BMW E60 M5 2008 with logic 7 Amp. The sound is working and the bass is working, but the quality of the sound does not sound correct as it did a few years ago so i must compensate by using the equalizer. Even with adjusting the equalizer the sound still does not sound as it should. Could this be an amplifier problem or something else?
sounds like the speakers, check them first.
Hi I need to know where I can find this transistors 269-3RD2f7 from my Logic 7 Amplifier for BMW 745LI, also where I can find the 4 chips to replace. Thanks
It's at the nerds are us warehouse. Or at the I've never seen a vagina electronics store.
Yea hi I have a 2007 BMW e92 335i , My bass to my sound doesn't come on , I was playing around with the aux port that's in the middle console of the car and it started working for 2 min and cut out again , if it was my aux port would that make myRadio bass stop working too ?
no
It’s a shame you didn’t show how to open the amp
Hi Jon! It was easy to open, other ways I must show the tip for it. It was already a 24 minutes video to make it longest. The mayor issue could be to remove it from the car. But at the end of the day, I thought it didn't require special tip for it too. But you are right! To make a video about how to remove it from the car could be a very good instruction for people to be able to bring it to electronics service or to replace it with other second hand. I will give you a like, because I miss that good instruction for car owners.
I need this amp do you sell refurbished amps?
Hi, could you provide an email address so I can get in touch with you? I am interested in your repair service repairing this amplifier.
is there an english version of this video?
is there a version of you that's not a dick?
So basically I just need two thousand dollars of equipment to fix an $800 amplifier. Got it.
U fixed it?
Look like highly suffisticated method not the one you can do on your back yard .
You are right. This is a task for a modern workbench. This kind of fixing requires more than a DMM, and some schooling, oscilloscope, LCR-T4 tester and hot air rework station is needed for it. Technology requires more knowledge and maybe specialization in specific areas to deal with. But also education is on liine, and the sophisticated equipment is becoming a common resource that many people can get. (It was not the same situation 20 years ago, when to get equipment was limited to the ones with high budget). :-)
BMW stereo system are garbage
um no they are not. they are very good. plus they arent bmw systems lol. they are usually hk or bose.
Ilya Glazunov the logic 7 amp are garbage
Angry much?