Modified 2.1 channel amplifier schematic, a 90.6 KB PDF; the title does not say which original design was altered or which ICs are used. Read the diagram to identify the active devices and compare it with the source circuit if available. Builders and repairers use it to trace channels, the subwoofer filter and power wiring. Since modifications may be untested, check component values and ratings against datasheets before construction.
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 @pdf_servicemanual. 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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)