Monitors temperature to prevent overheating during fast charging. Identification Communicates the battery type and capacity to the charger. C1–C4
This area handles the AC mains input. It includes the bridge rectifier, smoothing capacitors, and the switching MOSFET that drives the transformer. pbm27a-210-mv--r diagram
A standard diagram for this board reveals several critical sections: pbm27a-210-mv--r diagram
When looking at a DeWALT pinout diagram , the PBM27A board interacts with eight specific terminals on the battery: Description Battery Positive/Negative Main power path for charging and discharging. TH Thermistor pbm27a-210-mv--r diagram
Usually caused by a power surge at the AC input.