Sharp Aquos LC-30HV4H, Руководство по обслуживанию

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LC-30HV4M
LC-30HV4H
MAJOR IC INFORMATIONS
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IC2501 (MSP4458G)
IC for decoding audio signals.
It serves as an S-IF audio signal decoder and an audio data selector.
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IC2701 (IXA385WJ)
IC for controlling audio delay.
This model uses a frame buffer to process video signals. This results in a delay in outputting video signals. The
IC delays output of audio signals to synchronize output of video and audio signals.
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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 Y/C separation circuits IC401 (main) and IC402 (sub). Audio
signals are sent to the SR unit via IC2501 (sound processor).
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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.
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IC1601 (SDA5550M) (Only for LC-30HV4M)
Teletext processing micro-processor.
This IC receives vide signals, decodes teletext and outputs data in RGB format.
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IC7001 (µPD64084)
This IC provides 3D processing of NTSC signals and thus high resolution Y/C separation of the main image
signals received from IC1301.
It incorporates a 4M-bit frame delay memory board and features one-chip 3D Y/C separation.
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Two operation modes available; dynamic image 3D Y/C separation mode and 2D Y/C sepa YCNR
mode
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Y coring circuit, vertical contour compensation circuit, peaking filter and noise detection circuit incorporated
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Power down mode available to minimize power consumption when not in operation
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IC401/IC402 (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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IC403/IC7003/IC404 (ML6428Cl)
6.7 MHz low-pass filter.
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IC801/802 (TB1274AF)
IC for synchronous processing of video and chroma signals for PAL/NTSC/SECAM colour TV.
Color demodulation is provided by a high-performance image compensation circuit in the video section, a
PAL/NTSC/SECAM auto discrimination circuit in the chroma section, and a crystal that generates 4.43 MHz,
3.58 MHz and M/N-PAL clock signals.
This IC has a 4-channel YC signal input, 2-channel RGB signal input, and 2-channel chrominance signal input.
It receives main and sub chrominance signals from IC401 (main) and IC402 (sub) and delivers chrominance
signals via one-channel output.
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IC803 (CXA2101Q)
IC having a chrominance input integrated with a high-performance image compensation circuit. Equipped with
circuits for processing baseband signals and RGB signals and a 4-channel video switch incorporating an H/V
synchronization signal processing circuit.
Input selection is done by INPUT-SEL (IIC BUS). YCbCr, Y, PbPr, GBR and their H/V synchronization signals
are inputted to input pins of each channel.
Multi-scan facility permits acceptance of a horizontal scan line frequency range of 15 kHz to 60 kHz.
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IC1901 (IXA392WJ)
FPGA for synchronous processing.
This IC selects synchronization signals and creates horizontal blanking signals.
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IC604 (TA1318AF)
IC for synchronous processing of TV component signals and measurement of frequency.
This IC incorporates an input signal frequency measurement feature and synchronous regeneration features.
It supports synchronous horizontal regeneration (15.75 kHz, 31.5 kHz, 33.75 kHz and 45 kHz) and synchronous
vertical regeneration (480I, 480P, 576I, 720P, 1080I, PAL 100 Hz, and NTSC 120 Hz).