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Old Yesterday, 11:24 PM   #3021
Markw4 is offline Markw4  United States
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Join Date: Jul 2016
Location: California
Originally Posted by dv187736 View Post
As you’ve suggested, I need to practice and hone my soldering skill before attempting to do the clock change on my final board.
Actually, the last time I swapped out a clock I did it a little differently than before. I removed the old one as usual with Chip Quik alloy.

Then rather than trimming away any ground traces around the solder pads, I observed that all the green solder mask was still in good condition and unscratched, so far so good. Then I put a little solder on the side of the tip of the iron and slid it along one of the solder pads on the bottom of the new clock module. It left a little bead or a bump of fresh shiny leaded solder with a good amount of flux still on it on the bottom of the clock solder pad. I did that for each of the four solder pads on the clock and made sure each little bump of solder was the same height for each pad.

After redoing any that needed it until they all looked the same, then I just held the new clock carefully in place on the dac board with my fingers and touched the tip the iron to the side of the ground pad on the clock to melt the solder I put on the bottom (ground is the one directly across from the clock output to the dac). I then looked to make sure the clock pads were perfectly centered on the dac board solder pads, which they weren't quite. So I reheated the side of the ground pad again and moved the clock slightly into place.

Once it was exactly centered, I heated the other pad sides one at a time. Doing that of course melted the solder I left in place on the bottom of the clock pads earlier, so I didn't need to add any solder at this stage.

As I went around and heated and flowed each one, I checked with a DVM using sharp tiny probes to make sure each pad was soldered and no shorts on any of the pads to ground. It went pretty quick and easy that way. Usually clocks give me more soldering anxiety than any other solder job, but this was the easiest way I found to do it yet.

The reason for anxiety with these clocks is because the new clocks are a little bigger than the old ones. They just exactly fit on the board pads, but only if the clock is perfectly centered.

However, I noticed in Serge's thread that people seem to be able to change the clocks okay. We haven't had anyone yet who said they ran into a problem and had to Chip Quik off the new clock in order to redo it more well centered.
If by any chance it were to become necessary to Chip Quik off a new clock, just be sure to use a small amount so it doesn't get into the slots in side of the clock cover. That might be hard to clean out, so go slow and careful and use the least amount possible would be my advice.

Last edited by Markw4; Yesterday at 11:27 PM.
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Old Today, 08:54 AM   #3022
nori1000 is offline nori1000  Austria
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Join Date: Dec 2015
Location: Dornbirn
Originally Posted by Markw4 View Post
Page not found.

Maybe it was something you bought that you had to logon to view? If so, we would need a link to a publicly viewable version.
ES9038 Q2M DAC DSD decoding board supports IIS DSD 384KHz coaxial fiber DOP-in Integrated Circuits from Electronic Components & Supplies on Aliexpress.com | Alibaba Group
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