English-language PDF about DC-to-DC regulators, 3.13 MB, filed with schematics. The name carries a numeric code but no specific IC or board, so it reads as a general reference or application note. Material like this explains buck and boost topologies, inductor and capacitor selection, feedback and enable pins. Use it to understand the step-down converters feeding processors, memory and panel supplies on TV main boards, and to recognise faults like a regulator held off or shorted output.
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 @datasheets1. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.