| Pin # | Symbol | Function | |-------|--------|-----------| | 1 | P | Positive DC bus input | | 2 | VB1 | High-side floating supply for U-phase | | 3 | VS1 | Floating ground reference for U-phase | | 4 | VB2 | High-side floating supply for V-phase | | 5 | VS2 | Floating ground reference for V-phase | | 6 | VB3 | High-side floating supply for W-phase | | 7 | VS3 | Floating ground reference for W-phase | | 8 | VCC | Low-side logic supply (15V typical) | | 9 | GND | Control ground | | 10 | HIN1 | PWM input for high-side U | | 11 | LIN2 | PWM input for low-side V | | 12 | HIN3 | PWM input for high-side W | | 13 | N | Negative DC bus (power ground) | | 14 | U | Output phase U (motor connection) | | 15 | V | Output phase V | | 16 | W | Output phase W | | 17 | FO | Fault output (active low) | | 18~24 | CIN, VTH | Current sense & temperature sense |
Check for the presence of the Standby Voltage (usually on a purple or gray wire depending on the HP adapter used) before attempting to jump the PSU. Safety Warning: ps42419ha schematic top
Connect the rectified mains output (e.g., from a diode bridge + 450V electrolytic capacitor) across P and N. Ensure the capacitor is rated for at least 400V and has low ESR. | Pin # | Symbol | Function |