Ipc-ch-65 Pdf -

A: No, but it is strictly controlled. Section 5.4 warns against ultrasonic for crystals, MEMS, or relays. Use only if all components are rated for 40–80 kHz at < 5 W/in².

The document supports the "objective evidence" required by other standards like J-STD-001 . It references methods for: IPC-CH-65 Cleaning Guidelines | PDF - Scribd ipc-ch-65 pdf

Elias leaned closer to the CRT monitor, the static buzzing against his fingertips. The log continued. A: No, but it is strictly controlled