[sdiy] Solder won't stick to old PCB

[cs e]

Thanks guys...I think that the joints are oxidized.  I'm not using
lead-free solder (I went and bought a boatload once I heard of ROHS a
few years ago) - and I'm sure my iron is hot enough.

I'll clean it off with alcohol and try some flux...for now I got the
crucial part to stick.

On 9/26/09, Graham Atkins <gatkins at blueyonder.co.uk> wrote:
> A few things. Don't try and use unleaded solder. Use conventional leaded
> solder on older equipment. The reasons the solder will not flow are
> either the
> iron is not at the right temperature, probably not high enough, or the
> most likely
> problem you have is oxide on the joints/tracks. Try cleaning with
> isopropyl
> alcohol on a cotton bud. Application of some additional flux (pen or
> brush) may
> also help.
>
> Graham
>
> On 26 Sep 2009, at 21:14, cheater cheater wrote:
>
>> Can this be because of ROHS? (i don't know)
>>
>> D.
>>
>> On Sat, Sep 26, 2009 at 9:03 PM, cs e <modulemania at gmail.com> wrote:
>>> Hi,
>>>
>>> I'm trying replace some components on a 20+ year old pcb, but my
>>> solder won't stick to anything (other components or existing joints).
>>> It just dries into little spheres and rolls off.
>>> Any advice?
>>>
>>> Thanks,
>>> Chris
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