Sony CPD-220VS - Manual (Page 14)

Damper wire
Using a white background, very thin horizontal lines on the screen are
visible as shown below. These lines are the damper wires.
The Trinitron tube has a vertically striped Aperture Grille inside. The
Aperture Grille allows more light to pass through to the screen giving
the Trinitron CRT more color and brightness.
The damper wires are attached to the Aperture Grille to prevent
vibration of the Aperture Grille wire so that the screen image is
constantly stable.
Approx. 6 cm
(2 ^/s inches)
Damper wires
Approx. 6 cm
(2^/8 inches)
14
Using Your Display