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Re: is there anyone who would be willing to replace the si5153a synthesizer chip on my qcx?


 

Hi Rick,

There must be someone nearby who can help you out, just in case you want to try yourselves with a regular soldering iron: here is how I do it:

1. add excessive solder on both sides of the IC, then by quickly alternating the iron tip from one blob to the other you can keep them both melted, when that happens you can shift the part away from the footprint, and it is removed.

2. cleanup the solder tip with a wet sponge, and heat the solder that is left over on the footprint, repeat; heat only quickly and without force so that the footprint will not get damaged.

3. place the new IC on the footprint with the dot on pin 1 and pins centered on the pads, press the IC to the PCB when aligned and heat the pins, do not add any additional solder as this will create bridges. make a photo with your phone, zoom-in and inspect.

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