Sharp AQUOS LC-42D64U, Service Manual

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LC-42/46/52D64U
7 – 1
LC-42/46/52D64U
Service Manual
CHAPTER 7.
MAJOR IC INFORMATIONS
[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 (iXC138WJQZ).
The audio output signal from this IC flows into audio codec IC1403 (AK4682EQ).
1.2. IC2701 (VHiYDA147SZ-1Y)
The Class-D type digital audio power amplifier YDA147SZ gives maximum continuous output of 15 W/ch.
1.3. IC803 (VHi-1Q)
The Sii9181 is TMDS Switch devices supporting Revision 1.3 of the HDMI Specification.
It is a single HDMI input, single output device used to buffer the TMDS signal.
The Sii9181 is used to receive a set of HDMI/DVI signals from the HDMI/DVI receiver-port, and to generate a HDMI/DVI fully compliant 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 HDMI port is switched.
1.4. 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 or INPUT-6 (HDMI-analog audio) or INPUT-7 input terminal is fed into this IC for selection.
The selected signal flows through A/D-unit into the video signal processing circuit IC8001 (iXC138WJQZ).
The digital audio signal (I2S) from IC1402 flows into audio power amplifier IC2701 and AUDIO OUTPUT terminal via each D/A-unit.
1.5. IC1502 (VHi-1Q)
The Sii9125 supports the HDMI V1.3 specification and allows receipt of 10/12-bit color depth up to 1080p resolutions.
A single Sii9125 provides two HDMI input ports.
This IC decodes TMDS signal to Digital Video signal.
Compatible with the HDCP system, encrypted signals can also be received.
This IC responds to the INPUT-4, 5, 6 HDMI (High-Definition Multimedia Interface) selected by IC1604.
1.6. IC1604 (VHi-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, 5, 6 HDMI port are switched.
1.7. IC2002 (RH-iXB986WJN7Q)
The monitor microprocessor is intended to communicate with the main microprocessor and to operate the system.
It also controls power of the entire system.
1.8. IC3201 (VHiTB1305FG-1Q)
The TB1305FG has function sync separation and H/V format detector for TV component video signals. (INPUT1/3 and INPUT7)
This IC is controlled by I2C Bus interface.
1.9. IC3301 (VHi-1Q)
The THC7981 is 10bit A/D Converter for analog video signal. (Component: INPUT1 and 3, analog RGB: INPUT7)
This IC is controlled by I2C Bus interface and corresponds from 10 to 170MSPS for Full spec HD-TV.