Sony DCR-TRV50 Operating Instructions (primary manual) - Page 222

Usable cassettes Notes on the cassette When affixing a label on the cassette Be sure to affix a label only at the locations illustrated below [a] to prevent malfunction of your camcorder. After using the cassette Rewind the tape to the beginning, put the cassette in its case, and store it upright. When the cassette memory does not work Reinsert a cassette. The gold-plated connector of the cassette may be dirty or dusty. Cleaning the gold-plated connector If the gold-plated connector on the cassette is dirty or dusty, the remaining tape indicator is sometimes not displayed correctly, and you may not be able to operate functions using cassette memory. Clean the gold-plated connector with a cotton-wool swab, about every 10 times that the cassette is ejected. [b] Do not affix a label along this border. [a] [b] 222