Dead charger for BC235XLT -- anyone have this problem ?
 

Recently the charger for my BC235XLT went dead. The battery packs are
4.8 vDC, but the charger is only charging at a rate of about 4.1-4.3v.

I believe that it's the charger and not the batteries. I have owned
since new and I generally run the battery pack completely down before
using the next battery pack. There are only 4 components on the
circuit board which step down the voltage from 12.0 v. to the 4.8/5.0
charging voltage, so I believe that one of the 4 components have gone
bad (2 diodes and 2 resistors).

Has anyone else had this problem? Can someone point me to which
component is bad so that I don't have to de-solder all the components
off the board to figure out which is defective ?

What is the open circuit voltage to the terminals with the battery removed?


"X-Eliminator" wrote in message
...
Recently the charger for my BC235XLT went dead. The battery packs are
4.8 vDC, but the charger is only charging at a rate of about 4.1-4.3v.

I believe that it's the charger and not the batteries. I have owned
since new and I generally run the battery pack completely down before
using the next battery pack. There are only 4 components on the
circuit board which step down the voltage from 12.0 v. to the 4.8/5.0
charging voltage, so I believe that one of the 4 components have gone
bad (2 diodes and 2 resistors).

Has anyone else had this problem? Can someone point me to which
component is bad so that I don't have to de-solder all the components
off the board to figure out which is defective ?

Input voltage before going into charger (coming out of the power
supply): 15.01 v.

Voltage at battery jack (no battery connected): 14.62 v.
Voltage at battery jack (dead battery connected*): 3.97v
*where battery has initial charge of about 3.80v.

With the dead battery connected, the input jack voltage (raw voltage
coming out of the power supply) drops to 12.61v.

(All voltages are with the scanner NOT connected to the pass-through
jack.)

Funny thing happened over night -- one of the batteries charged-up to
5.89v. This makes me think that there is a cold solder joint in the
charger since the charger completely charged-up one battery. I'll see
if the second battery charges-up over night).

Thanks in advance

================================================== ===
On Thu, 12 Feb 2004 19:31:31 -0500, "W4JLE" w4jle(remove to
wrote:

What is the open circuit voltage to the terminals with the battery removed?


"X-Eliminator" wrote in message
.. .
Recently the charger for my BC235XLT went dead. The battery packs are
4.8 vDC, but the charger is only charging at a rate of about 4.1-4.3v.

I believe that it's the charger and not the batteries. I have owned
since new and I generally run the battery pack completely down before
using the next battery pack. There are only 4 components on the
circuit board which step down the voltage from 12.0 v. to the 4.8/5.0
charging voltage, so I believe that one of the 4 components have gone
bad (2 diodes and 2 resistors).

Has anyone else had this problem? Can someone point me to which
component is bad so that I don't have to de-solder all the components
off the board to figure out which is defective ?