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LC-32/37D64U
CHAPTER 7.
LC-32/37D64U
MAJOR IC INFORMATIONS
Service Manual
[1] MAJOR IC INFORMATIONS
1. MAJOR IC INFORMATIONS
1.1. IC501 (VHiSM5351AF-1Q)
This I2C bus-controlled audio/video switch is designed to switch video signal between two-system color difference (component) signal, one-system S
video signal and three-system composite signal, and to switch audio signal between three-system signal.
The analog audio/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 IC8001 (iXC376WJQZ).
The audio output signal from this IC flows into audio codec IC1403 (AK4682EQ).
1.2. IC1403 (VHiAK4682EQ-1Y)
This IC provides for 2-channel A/D and 4-channel D/A (192-kHz sampling).
The analog audio signal from IC501 is fed into this IC for selection.
The selected signal flows through A/D-unit into the video signal processing circuit IC8001 (iXC376WJQZ).
The digital audio signal (I2S) from IC1402 flows into audio power amplifier IC2701 and AUDIO OUTPUT terminal via each D/A-unit.
1.3. IC1604 (VHiSii9185+-1Q)
The Sii9185 is the TMDS Switch devices supporting Revision 1.3 of the HDMI Specification.
This IC is used to select a single set of HDMI/DVI signals from one of three HDMI/DVI receiver-ports, and to generate a fully compliant HDMI/DVI
stream as an output.
It also provides DDC/HDCP, HPD, and +5V switching to allow full compliance to the HDMI/DVI Specification.
On this IC, the INPUT-4, 5HDMI port are switched.
1.4. IC2002 (RH-iXB986WJNAQ)
The monitor microprocessor is intended to communicate with the main microprocessor and to operate the system.
It also controls power of the entire system.
1.5. IC2701 (VHiYDA147SZ-1Y)
The Class-D type digital audio power amplifier YDA147SZ gives maximum continuous output of 10 W/ch.
1.6. IC8001 (RH-iXC376WJQZQ)
This LSI is FULL HIGH-DEFINITION 1080P DIGITAL TV SYSTEM-ON-A-CHIP. It combines a cable/terrestrial 4/1024-QAM and 8/16-VSB receiver,
a transport processor, a digital audio processor, a high definition (HD) MPEG video decoder, 2D graphics processing, digital processing of analog
video and audio, analog video digitizer and DAC functions, stereo high-fidelity audio DACs, a 330-MHz millions of instructions per second (MIPS) pro-
cessor, and a peripheral control unit providing a variety of television control functions.
The cable/terrestrial receiver directly samples a tuner output with an analog-to-digital converter (ADC). The LSI digitally resamples and demodulates
the signal with recovered clock and carrier timing, filters and equalizes the data, and passes soft decisions to an ATSC A/53 and ITU-T J.83 Annex A/
B/C-compatible decoder. It has an MPEG-2 Digital Video Broadcasting (DVB)-compliant transport processor with advanced section filtering capabil-
ity, DVB descrambler, and an MPEG-2 (MP@HL profile) video decoder.
Audio support includes a BTSC and a Dolby AC3/MPEG-2 Layer 1, 2, audio decoder. The LSI provides analog and digital audio/video outputs. A
SPDIF output and a pair of analog outputs (L-R) are provided via the integrated audio DACs. The NTSC analog video decoder is supported by its own
motion adaptive deinterlacing and 3D comb filtering, including 1080i deinterlacing.
The LSI includes advanced 2D graphics processing. Two transport stream inputs are included. The LSI incorporates a complete MIPS32(r)-based
microprocessor subsystem including caches with bridging to memory and a local bus, where external peripherals can be attached. Integrated periph-
erals include two USB 2.0, three UARTs, counter/timers and GPIO controllers.
1.7. IC8452 (RH-iXC277WJQZQ)
The 64-Mbit page mode flash memory device stores the main CPU program.
7 – 1
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