PDF schematic of the Topstar X03 board, 548 KB. The name gives no revision or date, so confirm the board version against the title block in the drawings. Topstar is an ODM whose designs were sold under various brand names, making the PCB marking more reliable than the retail model. Open it in any PDF reader to trace supply rails, follow the power-on sequence and identify components when hunting for shorts or missing voltages.
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 @IT_SERVICE_WORLD. 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)