On Fri, 05 Oct 2012 20:10:55 -0500, legg wrote:

This DeWalt 9116 charger has had battery packs forced into it
repeatedly and strongly enough to crease-open board foil in the area
and crack R49 ntc thermistor in half. The thermistor chip fragment
remaining in the R49 half-package still measures ~77K, but standard
values suggest this should be sloser to either 13K, 25K, 37K or 120K
at room temperature.

So what's the correct normal R49 value for replacement?

Dunno. I couldn't find a schematic. Easiest way is probably to find
an identical charger and measure the resistance.

This might be interesting and possibly useful:
http://dewaltownersgroup.com/index.php?topic=869.0

As a result of the physical damage, other parts are also damaged, but
I believe these have been fairly easy to track down, identify and
replace.

I see DeWalt chargers at the local used tool dealer for about $20. Not
sure which model but it looks similar. It's always easier to repair
something when you have a working unit available with which to
compare.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558