Sony CCD-TR9 - Manual (Page 55)

Video Head Cleaning
To ensure clear pictures, clean the video heads periodically.
When playback pictures are noisy or hardly visible, the video heads may be
contaminated.
Slight contamination 1 ^^ Critical contamination
In such cases, follow the procedures below:
1 Clean the video heads with the Sony V8-2SCLH cleaning cassette (not
supplied), referring to its instructions.
2 After cleaning, check to see if the picture is clear by recording or playing back
with an ordinary tape.
3 If the picture is still noisy, repeat cleaning. (Do not repeat cleaning more than
5 times.)
If the V8-25CLH cleaning cassette is not available in your area, consult your Sony
service facility.
Caution Do not use a commercially available wet-type cleaning cassette. It may damage
the video heads.
Chapter 4: Additional Information
55