Many thanks to SWLing reader, Mini, who wites:
I am Japanese short wave listener.
I found the method that disable soft-mute of TECSUN PL-210.
And, I posted the article in my blog.
Please forgive me that may be difficult for you to understand the content.
It is automatic translation from Japanese my blog.
Thank you, Mini! I don’t have the PL-210, but if I did I would certainly disable the soft mute as I find it very distracting during routine band scans.