No drawings?
Start with the physical board.
When the original documentation is missing, we investigate the board and organize the information needed to assess repair, replacement or reproduction.
Trace, document and assess.
- Identify component markings, values and polarity where readable.
- Trace accessible tracks and check continuity.
- Investigate power, control and input/output blocks.
- Reconstruct schematics and assembly drawings for traceable two-layer boards.
- Consider alternatives for obsolete components.
- Discuss redesign and reproduction prototypes.
From a physical board to a reproduction prototype.



This published case reached the reproduction prototype stage; it did not proceed to commercialization or mass production. Board identifiers and drawing details have been redacted.
What to include in your first inquiry.
Board dimensions, clear front and back photos, its application, symptoms if faulty, quantity and the documentation or prototype you need. We will confirm what should be reviewed next.
Physical inspection may be needed. Please agree shipping arrangements before sending a board.
Already have a paper schematic? See schematic digitization.
The Japanese-language PREP estimator can provide an indicative cost based on entered conditions. It is not a formal quotation and does not confirm overseas shipment or project terms.
Have a board or a drawing to discuss?
Tell us what you have and the outcome you need.
Start an inquiry →