Major Ic Informations (Avc System) - Sharp LC-37AD1E Service Manual

LC-37AD1E

MAJOR IC INFORMATIONS (AVC system)

∫ IC2501 (IXA416WJ)
IC for decoding audio signals.
It serves as an S-IF audio signal decoder and an audio data selector.
∫ IC2510 (IXA385WJ)
IC for controlling audio delay.
LC-30/37AD1E uses a frame buffer to process video signals. This results in delay in outputting video signals.
The IC delays output of audio signals to synchronize output of video and audio signals.
∫ IC2521 (NJU26106)
The NJU26106 is a digital signal processor that decodes the matrix-encoded (Lt/Rt) stereo signals. On this
model, Dolby Virtual function is supported by this IC.
∫ IC1301 (CXA2069Q)
7-input, 3-output selector.
This IC selects all audio and video signals received from input terminals and the tuner, except those signals
that relates to PC and components.
Video signals delivered to the IC are sent to YC separation circuits IC401 (main) and IC402 (sub). Audio
signals are sent to the SR unit via IC2501 (sound processor).
∫ IC1401 (MM1519XQ)
4-input, 3-output video selector for component input.
This IC receives AV3 component input, AV1/3 RGB input and teletext RGB signals. Its output is for main, sub
and component.
∫ IC1601 (SDA5550M)
Teletext processing microprocessor.
This IC receives vide signals, decodes teletext and outputs data in RGB format.
∫ IC401 (TC90A69)
Adaptive in-field comb filter supporting both the NTSC and PAL systems. Equipped with CNR circuit, the 3-line
digital comb filter is a high-precision Y/C single chip, which provides Y/C separation of sub image signals
received from IC1301.
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