Pioneer PDP-R03U, Service Manual

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7.3 IC DESCRIPTIONS
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Description of Main ICs
• IC1301 (CXA2069Q)
This IC is a 7-input, 3-output selector.
The video signals other than those for the PC and components, which have been input from each input connector
and the tuner, and all the audio signals are sent to the IC1301 and then selected.
The video signals sent to the IC1301 are then input to the YC separation circuits, IC7001 (main) and IC402 (sub).
The audio signals are input to the PC I/F Unit via IC2501 (sound processor).
• IC1401 (MM1519XQ)
This IC is a 4-input, 3-output video selector for component input.
The VIDEO-1/3 Y/Pb/Pr signals, RGB component input and TV signal are input to the IC1401. The output signals
go to the main, sub, and component channels.
• IC2501 (IX3370CE)
This IC is used to decode audio signals.
It serves as both the S-IF decoder and the selector for the input audio data.
• IC801/IC802 (TB1274AF)
This IC is intended for color TV brightness, chroma demodulation and sync processing.
It receives the main and sub brightness signals and color signals from IC7001 (main) and IC402 (sub) in the
preceding stage, and gives out color difference signals.
• IC803 (CXA2101Q)
With a high-performance picture correction circuit incorporated, this IC consists of a base band video signal
processing section for color difference input and a video switch (including HV sync signal processing).
Input selection is performed by INPUT-SEL (IIC BUS). The Y/Pb/Pr signals of Y/Cb/Cr/HD and their respective HV
sync signals are input to each line.
As the multi-scanning compliance range, a horizontal scanning frequency of 15-60 kHz can be input.
• IC1901 (IXA194WJ)
This IC is FPGA for the synchronizing system.
It creates sand castle pulses for IC803 and generates horizontal blanking signals.
• IC604 (TA1318AF)
This IC synchronizes TV component signals.
The IC604 incorporates the necessary functions for measuring the frequency of input signals and synchronous
replay into a single chip, and is applicable for horizontal synchronous replay (15.75, 31.5, 33.75, and 45 kHz) and
vertical synchronous replay (525I, 525P, 625I, 750P, 1125I, 1125P, PAL 100 Hz, and NTSC 120 Hz).
• IC7001 (PD64082)
Through 3-dimensional NTSC signal processing, the PD64082 performs high-precision Y/C separation for main
video signals sent from the IC1301.
In combination with a 4Mbit EDO (Hyper Page Mode) DRAM, this IC forms 3-dimensional Y/C separation and
YNR/CNR system.
• IC402 (CXD2093Q)
This IC is a comb filter in the applicable field. Being a single high-precision Y/C chip, the 3-line comb filter performs
the Y/C separation of the sub channel video signals that have been output from IC1301.
• IC804/IC810 (IX3473CE)
The IC804 is a 6.7 MHz low-pass filter, incorporating a 6 dB amplifier, for the sub screen.
The IC810, on the other hand, is a 6.7 MHz low-pass filter, also incorporating a 6 dB amplifier, for the main screen
(for SDTV).
• IC811 (IX3474CE)
This IC is a 30 MHz low-pass filter, incorporating a 6 dB amplifier, for the main screen (for HDTV).