T15 not working

[Drew3450]

So, my t15 Rev 1.4 module was working great for a few days. Now I get no signal through it. I just get some static when I turn the trim knob. I got +17.96V from J3 pin 2 to the +18, and -18.18V from J3 pin 2 to -18V. Also 46.6V, and .45V from J3 pin 2 to Conn 1 pin 1. 46.6V, and .43V for J3 pin 2 to Conn 1 pin 3. What do I need to do to get this thing working again?

[tpryan]

Re-flow all of the solder joints. What happens?

[Drew3450]

Im fairly new to electronic diagnosis. Is re Flowing just heating up the solder joints? or removing the solder and re applying it?

[pleasantbullet]

Yes, re-heat the solder joints. There's a possibility that one of your solder connections did not have enough solder. So after a few days it came lose. Reflow the connections, and add more solder on joints that dont have a proper fillet.

I have two T15's, the first one worked fine. But the second one didn't. I took it out, reflowed each joint. And added extra solder to the weaker looking joints and voila, worked.

Hope You get it working.

-al

honourandarms.wordpress.com

[Drew3450]

Thanks Al.
I reflowed the solder joints, but the same problem exists.

[tpryan]

Snip out the 1512 and replace it. You can order small quantities directly from Mouser.

[Drew3450]

Ok. Ill let you know when I have done that.

[Drew3450]

Word!!! I installed the new 1512 and it works great. Thanks