Schematic PDF for the NS-B241 optical drive (ODD) board used with the DG521 and DG721 platforms, about 271 KB. NS-coded boards follow LCFC numbering for Lenovo sub-boards, and DG521 and DG721 are the associated mainboard project codes. The sheet shows the connector pinout, power path to the drive and any switching or protection parts, letting a technician check supply voltages, SATA signal routing and continuity when the optical drive is not detected. Confirm the board label reads NS-B241 before comparing values.
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 (4)
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 |
| @ShareMan_Electronic_Files | 9 May 2025 | Open file on RM Schematics |
| @schematics_bios | 3 Aug 2026 | Open file on RM Schematics |
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