Sony CCD-TR814 Operation Manual page 39

Video Head Cleaning
To ensure normal recording and dear pictures, clean the video heads. When © appears in the
viewfinder in CAMERA mode or playback pictures are "noisy" or hardly visible, the video heads
may be contaminated.
[a]
Slightly contaminated
[b] Critically contaminated
If this happens, clean the video heads with the Sony V8-25CLH cleaning cassette (not supplied). After
checking the picture, if it is still "noisy", repeat the cleaning. (Do not repeat cleaning more than 5 times in
one session.)
Caution
Do not use a commercially available wet-type cleaning cassette. It may damage the video heads.
Note
If the V8-25CLH cleaning cassette is not available in your area, consult your nearest Sony dealer.