Schematic of the Compal LS-4492P E-KEY board, revision 1.0, part of the KAL90 design. It is a compact 16 KB PDF, so it most likely holds a single sheet with the key or button circuitry and the interconnect to the main logic board. In Compal numbering an LS- code marks a daughterboard, and the companion mainboard uses an LA- code. A technician can check switch continuity, pull-up resistors and connector pins with it. Verify the board label and revision on the actual PCB before relying on the drawing.
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 (16)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 5 Sept 2017 | Open file on RM Schematics |
| @LaptopsBoardview | 4 Jun 2019 | Open file on RM Schematics |
| @freeschematicdiagram | 7 Jun 2019 | Open file on RM Schematics |
| @abgm_manutencao_esquemas | 27 Jul 2019 | Open file on RM Schematics |
| @hrtechno | 4 Feb 2020 | Open file on RM Schematics |
| @alischematics | 13 Sept 2021 | Open file on RM Schematics |
| @pepeelectronica | 20 Apr 2022 | Open file on RM Schematics |
| @pepeelectronica | 24 Apr 2022 | Open file on RM Schematics |
| @alischematics | 6 Jan 2023 | Open file on RM Schematics |
| @generalschematics | 19 Oct 2024 | Open file on RM Schematics |
| @generalbios | 15 Dec 2024 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 28 Apr 2025 | Open file on RM Schematics |
| @schematics_bios | 23 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 25 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 1 Aug 2026 | Open file on RM Schematics |
| @schematics_bios | 13 Aug 2026 | Open file on RM Schematics |
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.