Sharp LC-65D90U, Руководство по обслуживанию

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LC-65D90U
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IC3401/IC3403 (IXB375WJ)
1 M x 32 bit x 4 banks Graphic Double Data Rate Synchronous DRAM, a memory for image processing and
buffering OSD data.
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IC3201/IC3203 (THC63LVD823)
170 MHz LVDS (Low Voltage Differential Signaling) 24-bit interface chip for transmission. It is an LSI for
serializing and transmitting RGB signals, HD/VD/blanking signals and pixel clocks.
LVDS is a method for transmitting high-speed digital signals via cables driven by small-amplitude differential
signals.
A link consists of five pairs of differential signals. The TA, TB, TC, and TD pairs are used for data transmissions,
and the TCLK pair is used for pixel clock transmissions. Seven data bits of TA, TB, TC, and TD (28 in total) are
transmitted per pixel clock.
The input RGB (24-bit) signal and sync signal (HD, VD and DE) are allocated to 56 data bits, equivalent of two
links.
The odd- and even-phase video data (RGB, 8 bits each) from IC3300 are converted to LVDS signal. The same
signal is input to both IC3201 and IC3203, which means that the output signals from these ICs are of the same
type.
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IC2501 (IX3370CE)
IC for decoding voice data that decodes SIF files and acts as a selector of input voice data.
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IC4602 (IXB227WJ)
The EEPROM is designed to store the 10-bit gamma correction and crosstalk correction data. When the set is
switched on, the data is read to IC4601 (IXB001WJ).
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IC2702 (AK4586VQ)
24-bit CODEC with built-in 2-channel ADC and 6-channel DAC. (CODEC is a device that converts analog
signals to digital bit stream.) AK4586 also contains a 96 kHz/24-bit compatible DIR (Digital Audio Receiver),
and automatically detects non-PCM data stream such as AC-3 and MPEG.
CODEC is an electronic circuit, a type of AD/DA converter that converts analog voice data to digital codes, and
vice versa.
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IC2700 (NJU26150)
Processor IC consisting of a 24-bit DSP (Digital Signal Processor) core with built-in DIR and various interfaces.
It is activated by downloading a program written on IC2706 (E2PROM) to the built-in PRAM.
Its internal function is composed of sound delay, BBE and parametric equalizer, and performs digital processing
in the I2S format.
It has three input lines (SDI0, SDI1 and SDI2) and three output lines (SD00, SD01 and SD02). Two types of LR
clocks (LRI and LRO) and BCKs (BCKI and BCKO) establish data transfer on serial data lines.
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IC2701 (NJU26106)
Digital signal processor to decode matrix-encoded stereo signal (Lt/Rt). On this unit, it functions as the Dolby
Virtual.
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IC2702 (AK4586VQ)
The CODEC is internally equipped with 2-channel A/D converter and 6-channel DAC.
This device is an electronic circuit that serves to convert analog audio data to digital codes and also to convert
digital codes to analog data. This is a type of AD/DA converter.