01-04-2013 10:37 AM
Ok, original charger for playbook have 5V 1A to 2A.
But onother questions. It is good idea to connect cable to USB in PC? In usb is 500mA and 5v
yes orig charger is about 2 amps but for jumpstarting you are bypassing the charge circut. Use of a PC usb port would be safer but I would still get a charger from a store that is 500 ma in case something goes wrong you wont fry your PC
01-04-2013 10:53 AM - edited 01-04-2013 11:21 AM
Ok, now i have on battery 1.45v
I start to charge over USB 5v 500mA for 10 minutes. I reply if voltage up Waiting...
EDIT: I connect for 10 min charge from USB my laptop 5v 500mA and battery still have 1.45v
When i connect to USB 1x red light and 5x yellow.
But i have very stupid situation. When i connect USB cable and use multimeter i got reverse polarization!
In your picture have 3 dot. From left:
When USB cable connected: i got result -1.1v
When i unplug usb cable and connent multimeter to this pin i got: 1.1v
01-04-2013 11:48 AM
depends on what kind of connector the battery uses to the mother board mine was different from knotty's picture so I had to disconnect it from the mother board i taped on my connnections cause my battery was quit low I left it charge for 2 hours before I plugged in the oe charger again. As for your reverse polarity you likely have the test leads backwards its impossible to have negative voltage. if you switch them around you should have 1.1v thats how you figure out what your positive and negative posts are. Do not try this if your not sure as Knotty has said you hook up the battery reverse polarity there is a good chance you will explode the thing.
01-04-2013 11:58 AM - edited 01-04-2013 12:02 PM
A have a last chance I have charger from BOLD 9000 (5v 750mA) I try to add micro USB to this charger and i try charge this original charger.
01-04-2013 05:08 PM - edited 01-04-2013 05:09 PM
Strange almost sounds like its shorted out....I never had voltage on the third pole.
Or... Dry joint has long been suspected as a possible cause of these problems. Remove, clean and replace might be a good idea (those 2 screws)
01-04-2013 05:14 PM
huh....I have learnt a ton in the couple weeks I have been on this site. Now that my playbook is working again I might actually start to enjoy it. Also handy knowing how to take it apart...
01-04-2013 05:26 PM
When i unplug all cablre/flex, voltage is the same when is plugged to motherboard. Maybe is battery domaged?
that is possible or maybe there are some diodes in there that are blown and no one has a schematic either
01-04-2013 05:30 PM
But it is strange, desktop manager detects PlayBook and show new update. But has problem to run because battery voltagi is to low When connect USB cable, always got 1xred and 5x yellow blink led