U4 very hot after SC25 is placed

Post questions or comments about the A12 here.

U4 very hot after SC25 is placed

Postby jashwa » Wed Dec 10, 2008 10:38 am

I read the similar previous post. All caps are properly oriented.
Everything measures as it should until the last step when I put SC25 into place. U4 gets very hot almost immediately. nothing happens to adjacent caps. Measurement between pins 4 and 6 of op amp show 9.46v regardless of changes done to R16. have inspected work and reflowed all solder joints with no changes.
thanks,
josh
btw other preamps work very well and sound great.
jashwa
 
Posts: 2
Joined: Wed Dec 10, 2008 10:27 am

Postby tpryan » Wed Dec 10, 2008 12:18 pm

Sounds like a bad op-amp. E-mail the details to support@seventhcircleaudio.com.
tpryan
Site Admin
 
Posts: 2078
Joined: Thu Dec 04, 2003 11:32 pm


Return to A12

Who is online

Users browsing this forum: No registered users and 5 guests

cron