Sharp Aquos LC-42D72U Service Manual Download

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LC-42D72U

5 – 1

LC-42D72U

Service Manual

CHAPTER 5.

MAJOR IC INFORMATIONS

[1] MAJOR IC INFORMATIONS

1. MAJOR IC INFORMATIONS

1.1. IC501 (MM3151XQ)

This I2C bus-controlled video switch is designed to switch between tow-system color difference (component) signal, one-system S video signal and
three-system composite signal.

The analog video signal from the INPUT-1 or INPUT-2 and INPUT-3 input terminal is fed into this IC for selection. The video output signal from this IC
flows through a low-pass filter into the video signal processing circuit IC3301 (IXB723WJ).

1.2. IC2701 (TPA3100D)

The Class-O type digital audio power amplifier TPA3100D gives maximum continuous output of 15 W/ch.

1.3. IC1401 (VHiAN5832SA-1Y)

The AN5832SA is an I2C bus-controlled, US-standard analog TV sound multiplexing demodulator IC. It has the following functions built in: SIF
demodulation, STEREO demodulation, SAP demodulation, dbx noise reduction, and audio AGC.

1.4. IC1403 (VHiAK4683EQ-1Q)

This IC provides for 2-channel A/D and 4-channel D/A (192-kHz sampling).

The built-in digital audio interfaces DIR (Digital Interface Receiver) and DIT (Digital Interface Transmitter) (192 kHz compatible, 6 inputs/1 output) are
compatible with the AES3, IEC60958, S/PDIF, and EIAJ CP1201 standards. Both the DIR and DIT can handle 192-kHz sampling and 24-bit data. The
DIR is also equipped with 6-channel input selector that detects not just PCM data but also Dolby Digital and other non-PCM data.

1.5. IC1406 (VHiNJU26111-1Q)

The 24-bit, DSP core, digital audio processor has the Circle Surround II 5.1, Tru Surround XT, Tru Bass, Focus, and Mono-To-Stereo functions. The
Circle Surround II 5.1 feature converts matrix-encoded stereo signals to theater-like 5.1-channel sounds. Un-matrix-encoded signals are also con-
verted to effects-rich 5.1-channel output. The Tru Surround XT feature creates three-dimensional sounds, richer than stereo signals.

1.6. IC1507 (VHiTMDS341A-1Y)

The TMDS341 single-chip IC is provided with multiple switching function, in which up to 2 HDMI ports can be selected for a single display input termi-
nal.

This 2-port device is also equipped with signal conditioning function and switching function. Each of the ports supports 4-channel TMDS signal, one
hot plug detection, and I2C interface. Each of the 4 TMDS channels, in turn, provides maximum 1.65-Gbps signal transmission rate, fixed 8-dB input
equalization, and enable/disable 3-dB output de-emphasis function.

On this IC, the INPUT-4/5 HDMI port are switched.

1.7. IC1508 (VHiSii9011L-1Q)

The TMDS receiver IC decodes differential serial-transmitted signal to parallel signal. Compatible with the HDCP system, encrypted signals can also
be received.

This IC responds to the INPUT-4/5 HDMI (High-Definition Multimedia Interface) selected by IC1507.

1.8. IC2002 (RH-iXB345WJNPQ)

The monitor microprocessor is intended to communicate with the main microprocessor and to operate the system. It also controls power of the entire
system.

1.9. IC3301 (RH-iXB925WJQZQ)

This video processor consists of an LSI system-on-chip device. For high-precision data processing, it is equipped with a high-precision 166-MHz, 10-
bit A/D converter.

For processing analog video signals, this IC supports the NTSC-compatible high-performance multi-format 2D/3D digital Y/C separation video
decoder as well as the video format conversion engine. It provides for 10-bit video signal processing.

1.10. IC3501/3502 (RH-iXB822WJQZQ)

These ICs are 128-Mbit GDDR SDRAM (Graphic Double Data Rate Synchronous DRAM), providing a memory for image processing and buffering
OSD data.