Kenwood X-45 Service Manual page 14

X-45/85
CIRCUIT DESCRIPTION
Audio Signal Processing System IC for Cassette Deck (HA12157NT)
The HA12157NT is an audio signal processing LSI chip
integrates potentiometers, recording equalizers, level
meters, and Dolby noise reduction systems on one chip.
Internal Functions :
Recording equalizer X 2 channels
Dolby B/C noise reduction X 2 channels
Potentiometer X 2 channels
Level meter X 2 channels
.
Block Diagram
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