Schematic in PDF form for the Samsung power supply board BN44-00300A, with the name marked as tested, suggesting the drawing was checked against a real board. BN44 is the part-number prefix Samsung uses for TV and monitor power supply modules. Use it to follow the standby circuit, PFC stage and main converter outputs, and to locate fuses, switching transistors and feedback optocouplers when a set will not power up. Compare the code on the PSU sticker and the revision letter before trusting component values. A 132 KB file opens in any PDF reader.
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 @gunvantrathore. Enginerys does not host this file.
All sources (7)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @gunvantrathore | 27 Dec 2019 | Open file on RM Schematics |
| @pdf_servicemanual | 2 Apr 2021 | Open file on RM Schematics |
| @pdf_servicemanual | 12 Sept 2021 | Open file on RM Schematics |
| @pdf_servicemanual | 12 Sept 2021 | Open file on RM Schematics |
| @pepeelectronica | 24 Apr 2022 | Open file on RM Schematics |
| @schematics_bios | 24 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 1 Aug 2026 | Open file on RM Schematics |
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