Audio/Video Switching - Akai 29CT24FS Service Manual

SERVICE MANUAL
6. TC90L01N
AUDIO/VIDEO SWITCHING IC FOR TVs
The TC90L01N is an audio/video switching
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IC for TV sets. Conforming to I C bus
standards, it allows you to perform various
switching operations through the bus lines
by using a microcomputer. This IC has the
functions of audio mute, ALC (Auto Level
Control), audio volume and so on.
Fig. 17
1) Features
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·I
C bus control
·Video: 3-channel inputs and 1-channel outputs (1 channels conforming to S system)
·Audio: 3-channel inputs and 3-channel outputs
·Monitor Audio out
·ALC (Auto Level Control)
·Audio volume by attenuator circuit
·Audio mute
·2 I/O ports
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