Battery Charger 48V2A Dont work repair find a PWM controller analog зарядное для электро скутера

Battery Charger 48V2A: Don't work, repair, find a PWM controller, analog charger for an electric scooter won't charge. A new 48V 2A 54V lithium battery charger stopped charging after a couple of uses. How do I disassemble it? There are no signs of life when turned on, no indicator, no voltage on the PWM. The board is cracked, the chip's power supply trace is broken, there is a large drop in the PWM controller's power line. How do I check the functionality of the PWM chip? Diagnostics of the primary circuit of the power supply. How do I select an alternative? What is a replacement? How do I find a similar PWM chip? A PWM chip for a power supply? A search for similar pinouts on a website. Replacement with an OB3840CP. Checking the charger. Load with a digital adjustable load. Atorch DL24. PCB breakdown. Photos of the radio components. What components are installed. Diagnostics, disassembly, repair, finding alternatives. Replacing the chip with a similar PWM replacement. Link to the Atorch DL24 New Version load: https://s.click.aliexpress.com/e/_oC9... Link to the load review:    • ATORCH DL24 New Version Electronic Loader ...