You usually don’t need to know “old” by age. In this case, “old traces” means any routed copper trace that is currently causing errors after we resized/replaced the board.
Easiest way to identify them:
Open the Review / Issues panel.
Look for these issue types:
Dangling Traces
Floating Copper
Overlapping Copper
Airwires
Click one issue, for example Trace 147b or Trace 321b.
Flux should highlight that trace on the PCB.
That highlighted trace is one of the problem traces to unlock/delete.
Repeat for each listed trace issue.
Do not delete:
component footprints
pads
board outline
schematic parts
net labels
Do delete/unlock:
highlighted copper routes/traces/vias associated with those review errors.
A shortcut: if there’s an option like delete all routing, rip up traces, or clear routed copper, use that. That is safer than trying to identify individual old traces one by one, because the schematic connections remain intact and the board will simply show airwires again for rerouting.
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
General Purpose Thick Film Standard Power
and High-Power Chip Resistor
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film
Features:
- RMCF – standard power ratings
- RMCP – high power ratings
- Nickel barrier terminations standard
- Power derating from 100% at 70ºC to zero at +155ºC
- RoHS compliant, REACH compliant, and halogen free
- AEC-Q200 compliant