EEVblog Electronics Community Forum

Electronics => Repair => Topic started by: tchiwam on June 13, 2023, 04:53:20 pm

Title: Agilen 8563EC
Post by: tchiwam on June 13, 2023, 04:53:20 pm

C716 tantalum short

Now only having a straight line above the scale across the range...

I 'm suspecting the U909 MC33284D to have disliked a negative input while the -15VDC was near 0V shorted by the C716...

IF on A3 is complaining too... so I guess that it might not behave until the GAIN is about right.

All input and outputs are near the same potential, it looks like it got hot too...

Anyway... ordered the part, let's hope :(

Title: Re: Agilen 8563EC
Post by: tchiwam on June 13, 2023, 05:08:14 pm

The suspect U909 that go hot ...

Both rails are good measured on the side of the caps and the IC pins

Title: Re: Agilen 8563EC
Post by: tchiwam on June 13, 2023, 05:29:15 pm

If I keep the span around 1MHz and add a signal I can see something ...

Well once I get the part... if it works or not... I'll let you know. And I hope this thread will be useful to someone someday.