jaychu1994

About the maintenance of the power supply board: One day before my Amplifi150, the woofer suddenly lost sound, so I removed the power supply board and found that a 5181 chip had burst, and then the resistance of R56 and R57 positions also burst, and then found that a triode also burst. I saw in the forum that other people also encountered the same situation as me. Because I couldn't see the words above clearly, I asked my friends in the forum. You can check my reply below this post to get the idea of maintenance: https://line6.com/support/topic/41708-amplifi-150-45-volt-power-supply-not-present/

I heard that many friends' memory card firmware is damaged and the speaker cannot be used normally. This is the firmware in the Amplifi 150 memory card. I removed the memory card from the motherboard and made a mirror file and shared it with you, hoping to help you revive AMPLIFi150. Thanks to a friend in the forum: SilverBoss. After his test, he proved that this mirror file can be used normally and can successfully revive the speaker. In addition, he also gave us some suggestions to avoid damage to the firmware of the speaker itself. 1.Do not edit or modify internal presets on the amp itself or save them in the amp itself, this destroys the firmware. It is best to save the presets you create to the My Tones folder. This is the download link：https://drive.google.com/file/d/1JjEn5peO7Mr_9Z1QixLhHJQu2k8G3-I5/view?usp=drive_link

I'm very excited to hear that you have successfully restored the machine. I will create a new post so that more people can see it. The tips you said are very useful. Many people, including me, should not know it.

Good morning, my friend, I successfully removed the sd card of the amplifi150, and then I used the DMDE software to clone the image file of the SD card. It creates a .bin file. Please try it and tell me if it works. I hope it can help you. This is the link to the Google Drive, you can download it here：https://drive.google.com/file/d/1JjEn5peO7Mr_9Z1QixLhHJQu2k8G3-I5/view?usp=drive_link

Thank you, brother! You really helped me! In our country, today is Sunday, and I will upload the firmware tomorrow Monday.

Appreciate，because my amplifi 150 is in my other home. I won't go there until next Monday. I will try to remove the memory card and repost it. As you said, help more people revive their Amplifi150. At the same time, I will send you the link of Google Drive under this post.

Can we help each other? I can try to take out the memory card and upload the firmware to Google Drive, but I also need help myself. I need a photo of the back of the amplifi 150 amplifier power supply board, because I need to know the resistance of the two resistors R56 and R57.

As you can see, my 5181 has also exploded, and the biggest problem I have encountered now is that the resistance at the R56 and R57 positions has also exploded, and I don't know what its original resistance should be. Could you please help me see what the resistance value on your amplifier power supply board is? Thank you very much!

I guess it should be MPS651, because my amplifi150 also exploded on the triode on the amplifier board. I can only see MS651 clearly on it. I believe the letter in the middle should be P, and then 5181PGAD also exploded. I found this triode on our country's shopping website. I may go online to try it.

I checked the power output of the power board (power amplifier circuit board) and found that the 45V voltage output of the woofer was not present, but the other 19V voltage output was normal. I saw posts in the forum about the same experience as me, but these posts did not There is no exact solution given. Can anyone tell me how to solve it? Thank you very much!