I have a Craftsman Charging Stand # 1421410 for 16.8 volt batteries that has burned out. Used when I bought it, it appears a prewvious owner opened it up and decided to install a full-wave bridge rectifier & filter capacitor inside as the input to the circuit board (between transformer and circuit board). Perhaps this was done to make it charge faster, since the built-in rectifier is half-wave, but for whatever reason, the large resistor (about 2 watts) and the small resistor for the LED (about 1/4 watt) are burned and I cannot read the color code. Could somepone please have a look at one of these units and tell me what the resistors are so that I can replace them? Thanks a lot
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My charging stand is doing the same thing. Were you able to find a replacement changing stand? If so where did you purchase it from.
Thanks
George
Thanks
George
r2 = 220 ohms 1/4w 5%
r3 = 35 ohms 2w 5%
ntc( thermistor )( looks like a discap) can heat up and not allow battery to charge , shoting connection across ntc will allow battery to be charged( volt and current are strongly advised , or no more than an hour and a half)
r3 = 35 ohms 2w 5%
ntc( thermistor )( looks like a discap) can heat up and not allow battery to charge , shoting connection across ntc will allow battery to be charged( volt and current are strongly advised , or no more than an hour and a half)
monitoring of voltage and current are strongly advised if you have to short the thermistor across. and or do not charge more than an hour and a half
Thanks for the data. If the thermistor was working as it should perhaps my charger wouldn't had burned to the point of opening the circuit in the manner it did. Would you happen to have the numbers off the thermistor too? Thanks
