i work on a hifonics brutus bxi 4000D class D amp.all of the power supply fets were shorted.
i replaced them all but the amp wont power up because there are no 12V on pin 12 of the 494 ic.when i solder a bridge from the remote terminal to pin 12,the amp powers up and has an idle current of 2,5A.the high-and lowside signals at the gates of the amp-fets are present.
but the speaker relays dont engage.
all of the 5 transistors which are visible in front of the power supply board,are ok
where can the error be?
i replaced them all but the amp wont power up because there are no 12V on pin 12 of the 494 ic.when i solder a bridge from the remote terminal to pin 12,the amp powers up and has an idle current of 2,5A.the high-and lowside signals at the gates of the amp-fets are present.
but the speaker relays dont engage.
all of the 5 transistors which are visible in front of the power supply board,are ok
where can the error be?
Attachments
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- General Interest
- Car Audio
- Hifonics Brutus amp does not power up