Power sequence sheet for the Sony MBX-165 board in its MS90 version, supplied as a short PDF. It sets out the order in which the standby and main rails, enable signals and power-good lines should come up when the laptop starts. A technician uses it with a multimeter or oscilloscope to find the step where startup stops on a dead board. Because MS90 and MS91 versions of MBX-165 exist, check the board label before comparing your measurements with this chart.
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 @afsschematicfree. Enginerys does not host this file.
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The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @afsschematicfree | 23 Feb 2024 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 5 May 2025 | Open file on RM Schematics |
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.