Read Sharp LC-30HV4E (serv.man2) Service Manual online
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LC-30HV4E
MAJOR IC FUNCTIONS INFORMATIONS
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IC2501 (MSP4418G)
IC for decoding audio signals.
It serves as an S-IF audio signal decoder and an audio data selector.
IC for decoding audio signals.
It serves as an S-IF audio signal decoder and an audio data selector.
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IC2510 (IXA385WJ)
IC for controlling audio delay.
LC-30/37HV4E uses a frame buffer to process video signals. This results in delay in outputting video signals.
The IC delays output of audio signals to synchronize output of video and audio signals.
IC for controlling audio delay.
LC-30/37HV4E uses a frame buffer to process video signals. This results in delay in outputting video signals.
The IC delays output of audio signals to synchronize output of video and audio signals.
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IC1301 (CXA2069Q)
7-input, 3-output selector.
This IC selects all audio and video signals received from input terminals and the tuner, except those signals
that relates to PC and components.
Video signals delivered to the IC are sent to YC separation circuits IC401 (main) and IC402 (sub). Audio
signals are sent to the SR unit via IC2501 (sound processor).
This IC selects all audio and video signals received from input terminals and the tuner, except those signals
that relates to PC and components.
Video signals delivered to the IC are sent to YC separation circuits IC401 (main) and IC402 (sub). Audio
signals are sent to the SR unit via IC2501 (sound processor).
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IC401 (MM1519XQ)
4-input, 3-output video selector for component input.
This IC receives AV3 component input, AV1/3 RGB input and teletext RGB signals. Its output is for main, sub
and component.
4-input, 3-output video selector for component input.
This IC receives AV3 component input, AV1/3 RGB input and teletext RGB signals. Its output is for main, sub
and component.
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IC1601 (SDA5550M)
Teletext processing microcomputer.
This IC receives vide signals, decodes teletext and outputs data in RGB format.
Teletext processing microcomputer.
This IC receives vide signals, decodes teletext and outputs data in RGB format.
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IC401/IC402 (TC90A69)
Adaptive infield 3-line digital comb filter supporting both NTSC and PAL.
This IC is a high-precision Y/C 1 chip incorporating a CNR circuit and performs YC separation of the sub video
signals received from IC1301.
Adaptive infield 3-line digital comb filter supporting both NTSC and PAL.
This IC is a high-precision Y/C 1 chip incorporating a CNR circuit and performs YC separation of the sub video
signals received from IC1301.
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IC403/IC404 (ML6428C1)
6.7 MHz low-pass filter.
6.7 MHz low-pass filter.
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IC801/IC802 (TB1274AF)
IC for synchronous processing of video and chroma signals for PAL/NTSC/SECAM color TV.
Color demodulation is provided by a high-performance image compensation circuit in the video section, a PAL/
NTSC/SECAM auto discrimination circuit in the chroma section, and a crystal that generates 4.43 MHz, 3.58
MHz and M/N-PAL clock signals.
This IC has a 4-channel YC signal input, 2-channel RGB signal input, and 2-channel chrominance signal input.
It receives main and sub chrominance signals from IC401 (main) and IC402 (sub) and delivers chrominance
signals via one-channel output.
IC for synchronous processing of video and chroma signals for PAL/NTSC/SECAM color TV.
Color demodulation is provided by a high-performance image compensation circuit in the video section, a PAL/
NTSC/SECAM auto discrimination circuit in the chroma section, and a crystal that generates 4.43 MHz, 3.58
MHz and M/N-PAL clock signals.
This IC has a 4-channel YC signal input, 2-channel RGB signal input, and 2-channel chrominance signal input.
It receives main and sub chrominance signals from IC401 (main) and IC402 (sub) and delivers chrominance
signals via one-channel output.
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IC803 (CXA2101Q)
IC having a chrominance input integrated with a high-performance image compensation circuit. Equipped with
circuits for processing baseband signals and RGB signals and a 4-channel video switch incorporating an H/V
synchronization signal processing circuit.
Input selection is done by INPUT-SEL (IIC BUS). Y, Pb, Pr and GBR of Ycb, Cr and HD and their H/V
synchronization signals are inputted to input pins of each channel.
Multi-scan facility permits acceptance of a horizontal scan line frequency range of 16 KHz to 60 KHz.
IC having a chrominance input integrated with a high-performance image compensation circuit. Equipped with
circuits for processing baseband signals and RGB signals and a 4-channel video switch incorporating an H/V
synchronization signal processing circuit.
Input selection is done by INPUT-SEL (IIC BUS). Y, Pb, Pr and GBR of Ycb, Cr and HD and their H/V
synchronization signals are inputted to input pins of each channel.
Multi-scan facility permits acceptance of a horizontal scan line frequency range of 16 KHz to 60 KHz.
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