Sharp Aquos LC-37D90U, Service Manual

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LC-37D90U
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[2] MAJOR IC INFORMATIONS
1. MAJOR IC INFORMATIONS
1.1. IC501 (MM1630CQ)
This I2C bus-controlled video switch is designed to switch between one-system color difference (component) signal, one-system S video signal and
two-system composite signal.
The analog video signal from the INPUT-1 or INPUT-2 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 (VH+-1Y)
The Class-T type digital audio power amplifier TA2024 gives maximum continuous output of 10 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, TruSurround 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 TruSurround XT feature creates three-dimensional sounds, richer than stereo signals.
1.6. IC1507 (VHi-1Y)
The TMDS341 single-chip IC is provided with multiple switching function, in which up to 3 DVI/HDMI ports can be selected for a single display input
terminal.
This 3-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 deemphasis function.
On this IC, the INPUT-3/4 HDMI port and the INPUT-5 DVI 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-3/4 HDMI (High-Definition Multimedia Interface) and the INPUT-5 DVI (Digital Visual Interface) selected by IC507.
1.8. IC2002 (RH-iXB345WJZZQ)
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-iXB723WJQZQ)
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-iXB375WJZZQ)
These ICs are 128-Mbit GDDR SDRAM (Graphic Double Data Rate Synchronous DRAM), providing a memory for image processing and buffering
OSD data.