When I using panasonic md9000, suddenly appear u11.
What is the meaning this message ???
Sorry if my english isn't quiet good.

Thx

I'm not familiar with the nv-md9000 but on other Panasonic cams the U11 error is for clogged or damaged heads.

Have you tried a head cleaner? Have you switched tape brands recently?

No, I always using Sony Cassette.
I never change my brand cassette.
But that message just appear for a moment.
How long if I want to clean my head with head cleaner?

Thx

I'd use a dry head cleaner one time and for no more than about 4-5 seconds.

If I want to clean with dry cleaner, in rec or VCR mode ?

thx

Use VCR Mode and Play for 4-5 seconds.