Spanish basic electronics guide, a general introduction rather than a schematic for any specific equipment. The name gives no device or board number.

Top-side print for a universal dos vas Matrix board, likely a dual voltage-amplifier-stage module, marked langsung print, meaning ready to print directly.

Named 28C17A, this 138 KB PDF is catalogued as a schematic but the code points to a 16 Kbit class parallel EEPROM in the 28C series, A revision.

Printed circuit board layout for the subwoofer 7294 project, revision 1.1, as a 72.5 KB PDF.

Bottom copper artwork for the Matrix i4 amplifier board rated 250 watts at 4 ohms, labelled langsung print, meaning ready for direct printing.

Top-side PCB print for an R2 amplifier rated 1500 watts into 2 ohms, with the Indonesian note langsung print meaning ready to print directly.

Compal LA-2922P board schematics, revision R1.0, supplied as a RAR archive of 1.21 MB. The P suffix follows Compal's later LA numbering style, though the name does not…

PCB artwork for the subwoofer 7294 design, version 1.1, in a 72.5 KB PDF. The Polish word oddruku in the name indicates a print-ready layout, meant for toner transfer or…

Print-ready schematic of the Orange Pi PC, revision 1.2, supplied as an 882 KB PDF. The print label suggests a layout formatted for paper output, handy for annotating…