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. This 166 KB PDF shows part placement, letting you locate VAS transistors, compensation parts and connection points when building or repairing. Universal boards are meant to fit various output stages, so check wiring to your power section. Print at true scale and use it together with the corresponding bottom copper layout.
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.