Schematic for the LiteOn PA-1121-04CA power adapter, rated 19 V at 6.32 A for 120 W, with Compal also named, presumably as the laptop maker it was supplied to. A charger of this rating usually includes a PFC front end ahead of the main flyback or forward converter. The drawing helps trace the PFC stage, main PWM controller, switching MOSFETs, secondary rectifiers and the voltage feedback loop. Remember the high DC voltage on the bulk capacitor during tests. Confirm the label and PCB revision before swapping components.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @schematicslaptop. Enginerys does not host this file.
All sources (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 18 May 2025 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 19 May 2025 | Open file on RM Schematics |
| @pkbiosbdv | 15 Sept 2025 | Open file on RM Schematics |
| @schematics_bios | 26 Oct 2026 | Open file on RM Schematics |
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