Sharp AQUOS LC-26GA5H, Service Manual

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LC-26GA5H/M/X
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IC3801 (CXA2069Q)
This is a 7-input, 3-output selector. All the video signals but the PC and component lines, coming from the
input terminals and tuner, as well as all the audio signals are fed into this IC for being selected.
The video output signal from this IC then flows through the low-pass filter circuits IC401/IC600 (SM5313AS) to
the YC separator-incorporating video decoder circuits IC402/IC502 (Main) and IC601 (Sub). The external
input audio signal is supplied through IC2701 (Sound Processor) to the digital amplifier circuit.
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IC3805 (MM1519XQ)
This is a 4-input, 3-output video selector for component inputs.
The INPUT1 and INPUT3 component inputs and the teletext RGB signals are received. Outgoing are the
component/RGB outputs for Main, Sub and Pass.
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IC1601 (SDA5550M) (LC-26GA5M/X only)
This is a teletext microprocessor. The teletext data of video signal input is decoded, and the resulting RGB
data is put out of this IC.
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IC401 (SM5302AS)
The SM5302AS is a 3-channel video buffer that processes the main signal and has a 5th order Butterworth
low-pass filter incorporated. The low-pass filter's cut-off frequency can be flexibly preset. This filter puts in and
out the video signals from 480i to 1080i.
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IC600 (SM5313AS)
The SM5313AS is a 6-channel video buffer that processes the sub signal and has a low-pass filter incorporated.
This IC is able to drive the S video signal, composite signal and component signal, through the 6 channels at
once.
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IC402 (CXD3802B)
The CXD3802BQ is a digital chroma decoder. The main signal is processed for the luminance signal, color
signal and sync signal with respect to the CVBS/YC signal, analog component signal and digital component
signal of adaptive 3D comb filter NTSC/PAL system. The output is 10-bit Y/CbCr (ITU_R601).
MAJOR IC INFORMATIONS