Re: Have to agree with Katie on this... Message #9 Posted by Geoff Quickfall on 6 Dec 2008, 10:46 p.m., in response to message #8 by Stan McFarland
Hi Stan,
I think it sounds like the battery rivet. To answer your first post:
1. remove the case back
2. remove the top circuit board (this will allow access to the
power tracings from the rivets.)
3. with one probe on the rivet work backwards from the rivet to
identify the problem
4. reverse the board and test the second rivet and trace.
5. IF the problem is found clean the board (vinegar rinse
followed by water rinse followed by alcohol and then a thorough
drying. (I use a shoe box with a hair dryer on COLD setting)
6. apply silver conducting paint.
On the second point,
1. clean the rivet with a fiberglass brush; fine wire brush; or
sand paper.
2. If blue residue exist clean with vinegar.
3. rinse with 90% alcohol.
4. just stick a little solder flux on the rivet,
5. then apply the solder iron and heat until the existing solder
flows, add some if required.
6. clean rivet with alcohol to remove acidic flux.
There is enough spring action in the battery to force the contact between the rivet and battery terminal. I doubt the rivet is worn flush with the circuit board, if I interpret your question correctly. If it is then try filing some of the circuit board back to expose more of the rivet edge to the battery. OR, build up the rivet with solder.
Hope this helps, Geoff
Edited: 6 Dec 2008, 10:50 p.m.
|