Early-revision schematic for Compal board LA-7221P, marked R0.5, in PDF inside a 1.76 MB rar archive. A 0.5 revision normally reflects a pre-production stage, so parts, values or nets may differ from retail boards that carry a later revision such as 1.0. It is still valuable for understanding power architecture, locating PWM controllers and following signals when diagnosing no-power or short conditions. Read the revision on your PCB first and prefer the matching document; use this one for reference where the circuits are unchanged.
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 (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 5 Dec 2022 | Open file on RM Schematics |
| @schematics_bios | 14 Aug 2026 | 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.