haier DTA21F98 - Manual (Page 33)

Connecting the TV set to the other video and audio equipment
Connection of AV input /output terminal
You can attach optional equipment such as another TV or other audio
amplification equipment to the scart/digital coaxial sockets at the rear
of the set to enjoy higher quality sound and picture.
Stereo
To video/audio input
DVD, VCD and other reproducing equipment
To outside input
TV EXT
COAXIAL
Coaxial cable
To COAXIAL
type digital
audio input
Amplifier
To TV EXT To TV EXT