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Grub Dac Issues

post #1 of 13
12/23/10 at 1:04am
Thread Starter 

Hi.  Today I was trying to remove a bridge from some of the pins on the dac chip, but then one of the pads fell off.  Will this effect it?

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post #2 of 13
12/23/10 at 3:59am

Depends on the pad - some are not attached to anything.  Good close up pictures will help show us if you have a problem.

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post #3 of 13
12/23/10 at 3:08pm

x2 for the pics

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post #4 of 13
12/23/10 at 8:13pm
Thread Starter 

Nvm, I messed up to the point that I can't fix it-- one of the pins fell off :(

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post #5 of 13
12/23/10 at 8:44pm

Which pin, you might not be screwed, not all the pins are used in U1. Stop for a second and take a pic.

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post #6 of 13
12/23/10 at 9:39pm

You don't have to worry, if the pad is gone you can use a small piece of wire and connect that pin to where it needs to be.

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post #7 of 13
12/24/10 at 3:07am
Thread Starter 

Alright.

DSC_0112.JPG

The left most pin on the bottom row fell off.  On the right row, the third pad from the bottom fell off. 

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post #8 of 13
12/24/10 at 3:09am
Thread Starter 

Thanks, btw :]

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post #9 of 13
12/24/10 at 6:19am

If I'm interpreting things correctly, both pins need to be tied to Ground.  That's not so bad, since all that means is that you have to find a way to connect those pins to the ground plane.  As ShinyFalcon said, a small piece of wire soldered to a scratched section of the ground plane (to expose the copper underneath) will work.

 

As a matter of fact, the adjacent pins are tied to Ground as well.  So for the bottom row, if you bridged the leftmost pin with the next pin to the right ... and for the right row, if you bridged the third pin from bottom with the next pin down, you should be OK.

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post #10 of 13
12/24/10 at 6:38am

To correct tomb, on the right side, the third pin from the bottom is tied to the second pin to the bottom and not to ground.  Bridge the two with a blob of solder.

 

The leftmost pin on the bottom is tied to ground so you can bridge it with the pin beside it (which is also tied to ground)

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post #11 of 13
12/24/10 at 7:19am

Thanks for that correction!smily_headphones1.gif

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post #12 of 13
12/24/10 at 12:19pm
Thread Starter 

Hahaaha thanks guys!

That's relieving.  I'll tell you guys how it goes after I buy some replacement resistors and stuff.

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post #13 of 13
1/3/11 at 11:02pm
Thread Starter 

I think the plastic at the bottom left pin melted, so the pin opening in sealed up.  will it still work?

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