Circuit diagrams for the Compal LA-B291P mainboard, revision R1.0, supplied as a 1.93 MB RAR archive. No notebook brand or chipset is named, so match the board by the LA-B291P marking on the PCB itself. Compal is an ODM that builds laptop boards for many brands under this LA-number scheme. Technicians use such a schematic to follow the power-on sequence, check voltage regulators and MOSFETs, and trace signal paths between chips. Check that the revision printed near the board number agrees with R1.0, since component placement can change between revisions.
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_bios. 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 | |
|---|---|---|
| @abgm_manutencao_bios | 10 Jul 2019 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 1 Oct 2019 | Open file on RM Schematics |
| @Satale_bios_esquemas_Laptop | 24 Feb 2021 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 2 May 2021 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.