Schematic PDF for a board named NDBU1401, marked 4L, which probably means a four-layer PCB, at revision 2.0. The name gives no brand, ODM or device model, so identify the hardware from its silkscreen before relying on it. The 1.82 MB document can be searched in any PDF reader for net and part names, letting a technician follow power rails, check regulator outputs and trace signals between ICs and connectors. Make sure the revision on the board matches 2.0, as earlier revisions may differ.
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 @alischematics. Enginerys does not host this file.
All sources (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @alischematics | 13 Sept 2021 | Open file on RM Schematics |
| @pepeelectronica | 28 Apr 2022 | Open file on RM Schematics |
| @schematics_bios | 3 Aug 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.