Hi Don,

We used to preheat our board to 100degC, be sure you measure the
temperature at the board not the preheater and use a Metcal 725 tip for
solid plane. It works well on our 12 layers board with 4 solid plane
layers.

Regards
Yak Peng

Don_well wrote:

> Hi all
>
>     As we know hand soldering  PTH component is difficult on a
> tens-layer boards because of high heat sink.The solder volume filling
> level is always less than 50%. Could you please give me  any ideas to
> settle this problems.Below is only for referrence.
>
> 1 Preheat the board about 100 degrees before rework.
>
> 2 Design a enlarged pad before manufacture.
>
> 3 >=25% solder level is acceptable.
>
> Thanks for your advice.
>
> B.Regards
>
> Don
>
> Huawei Tech Ltd

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