I need help idea what resistors that are circled in the pictures and also any other things that look like they need to be replaced or checked out would be greatly appreciated. all the transistors/mosfets are blown so I’m replacing those. I don’t have an oscilloscope so I can’t check the gate waves but am ordering one
Attachments
The FETs likely failed causing the resistors to burn. Clean the area with a toothbrush/cotton swabs and alcohol/acetone and repost the photos.
You could have driver damage and the output transistors may have failed, causing the power supply FETs to fail.
Don't apply power until all of the known bad components have been replaced/removed.
You could have driver damage and the output transistors may have failed, causing the power supply FETs to fail.
Don't apply power until all of the known bad components have been replaced/removed.
You
The output mosfets don’t have any shorts. Only the power mosfets do. R111 and r112 both are showing 4.5 and 4.6 ohms and look cracked. I was playing my music in bridge to 2 Ohm and it started to smoke back when I took it outta my car which led me to wanting to fix it. This amp is rated for being able to be 2ohm bridged
The output mosfets don’t have any shorts. Only the power mosfets do. R111 and r112 both are showing 4.5 and 4.6 ohms and look cracked. I was playing my music in bridge to 2 Ohm and it started to smoke back when I took it outta my car which led me to wanting to fix it. This amp is rated for being able to be 2ohm bridged
Attachments
What are those cracked resistors and anything else besides the power mosfets and those two resistors that need replacement ?
The amp likely failed because the gate leg on the FET cracked. If the amp was mounted on the enclosure, mount it somewhere else.
The resistors are likely something like 40 ohms. 39.2-47.5 have been used in similar sized amps. I'd use something nearer the 39.2.
The driver transistors may also need to be replaced.
The resistors are likely something like 40 ohms. 39.2-47.5 have been used in similar sized amps. I'd use something nearer the 39.2.
The driver transistors may also need to be replaced.