goyousalukis

AOUT NG Troubleshooting

4 posts in this topic

Hey guys,

I am looking for some help. I have a MBSeq4 with an AOUT NG connected with the line driver/receiver. 6 of the channels are working perfectly, but I have two issues:

When I test the calibration for each channel with the output set at 8V, I get a constant 11V at output 5, and 0V at output 7. 

I have checked continuity between the outputs and the opamp, along with verified the resistance. I have also verified continuity between the opamp and the DAC.

When I measure the voltages on the DAC pins for a working channel, I get 3V. When I check output 5, it has 4v, and output 7 has 0V.

Do you guys think I fried these two pins on the DAC?

Share this post


Link to post
Share on other sites

 

Hey

1 hour ago, goyousalukis said:

Do you guys think I fried these two pins on the DAC?

To me it look like...

There is not that many part at AOUT_NG... the weakest being the DAC

Just double check your measure at TLV5630 output with the TL074s removed

Best

Zam

 

 

Share this post


Link to post
Share on other sites

I agree with Zam: probably those DAC channels are dead (but do check directly at the pins). The TLV chip is quite sensitive to heat.

Share this post


Link to post
Share on other sites

Thanks guys - I havent had a chance to pull the OpAmp and recheck the voltages yet. I'll probably just settle for 6 CV outs.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now