Schematic in PDF format labelled for an IBM/Lenovo E420, with Compal LA-1331 given as the board reference. No revision is stated in the name, so check the document title block against the code on the PCB before trusting component values. Compal LA numbers identify the mainboard design rather than the retail model, which makes the printed board code the reliable match. Use the pages to follow power rails, check the charging and standby circuits and isolate shorted parts on a faulty board.
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 @abgm_manutencao_esquemas. Enginerys does not host this file.
All sources (9)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @abgm_manutencao_esquemas | 27 Jul 2019 | Open file on RM Schematics |
| @abgm_manutencao_esquemas | 4 Aug 2019 | Open file on RM Schematics |
| @one5technology | 19 Nov 2020 | Open file on RM Schematics |
| @nityatechnology2020 | 28 Jul 2021 | Open file on RM Schematics |
| @bartonarquivos | 8 Sept 2023 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 28 Apr 2025 | Open file on RM Schematics |
| @smschematics | 26 Nov 2025 | Open file on RM Schematics |
| @smschematics | 26 Nov 2025 | Open file on RM Schematics |
| @nityatechnology2020 | 13 Jan 2026 | Open file on RM Schematics |
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.