My JVC GRD72 miniDV camcorder will no longer run off battery power after
I *ahem* *coughcough* snagged the power cable and knocked it off the
table where it was charging. It landed on soft carpet and still
works--I've operated it for more than an hour total time afterward, both
recording and playback--but it will only run while plugged in, even
though the battery was fully charged at the time of the accident.

I suspect that the AC adapter socket was damaged in such a way that it
thinks the adapter is always plugged in, even when it isn't, and that's
why it refuses to switch to battery power. Does that sound reasonable?

Or is it possible that the battery itself was broken in the fall? I
measured 7.55V across its '+' and '-' terminals (the rated voltage is
7.2V), but I don't know how to test the 'T' terminal, which is
presumably a charge sensor.

Any advice would be appreciated.

I would take a look at the connection with the battery. A spring
might have deformed, etc. when it fell.

Since the power cable was attached when it was snagged, you might
be right, the connector is bent and needs to be re-bent.

Best regards
mark

Lachoneus wrote:

My JVC GRD72 miniDV camcorder will no longer run off battery power after
I *ahem* *coughcough* snagged the power cable and knocked it off the
table where it was charging. It landed on soft carpet and still
works--I've operated it for more than an hour total time afterward, both
recording and playback--but it will only run while plugged in, even
though the battery was fully charged at the time of the accident.

I suspect that the AC adapter socket was damaged in such a way that it
thinks the adapter is always plugged in, even when it isn't, and that's
why it refuses to switch to battery power. Does that sound reasonable?

Or is it possible that the battery itself was broken in the fall? I
measured 7.55V across its '+' and '-' terminals (the rated voltage is
7.2V), but I don't know how to test the 'T' terminal, which is
presumably a charge sensor.

Any advice would be appreciated.

--
----------------------------------------------------------------------
Mark W. Lund, PhD ** Battery Chargers
CEO ** Bulk Cells and Custom Battery Packs
PowerStream Technology ** Custom Power Supplies
140 S. Mountainway Drive ** DC/DC Converters
Orem Utah 84058 ** Custom UPS
http://www.PowerStream.com ** Engineering, manufacturing, consulting