Major Ic Informations - Sharp LC-26DA5U Service Manual

● IC3800 (MM1630AQ)
Video switch controlled by I2C BUS to select 4 color difference signals (component signals), 5 S-video signals and
8 composite signals.
The analog video signal input from each input terminal and the tuner is sent to this IC and selected. The video output
signal output from here and the component video signal are input into the video decoder circuit IC400 with a built-
in Y/C separation via the low-pass filter and into the A/D converter (AD988810) via the low-pass filter (IC5703),
respectively.
● IC3805 (NJM2750M)
4-input/1-output stereo audio selector.
Composed of switch operation amplifier and controlled by 2-input digital signals. The audio signal input from each
input terminal is sent to this IC and selected. The audio output signal output from here is fed to the digital amplifier
via IC2501 (SOUND PROCESSOR).
● IC2501 (IX3370CE/MSP3450G)
An IC for decoding voice data.
Decodes S-IF and simultaneously acts as a selector of inputted voice data.
● IC2702 (AK4586VQ)
24 bit CODEC with built-in 2CH ADC and 6CH DAC. (CODEC is a device that converts analog signal to digital bit
stream.)
It has a 96 kHz, 24 bit compatible built-in DIR (Digital audio receiver).
In addition, it automatically detects non-PCM data stream such as AC-3/MPEG.
CODEC is an electronic circuit, a type of AD/DA converter, that converts analog voice data to digital codes, and vice
versa.
● IC2700 (NJU26111)
Processor IC consisting of a 24 bit DSP (Digital Signal Processor) core with built-in DIR, E
interfaces. It is activated by downloading a program written on E
The internal function is composed of sound delay, BBE and parametric equalizer, and performs digital processing
in the I 2 S format.
It has three input lines (SDI0, SDI1 and SDI2) and three output lines (SD00, SD01 and SD02). Two types of LR clock
(LRI and LRO) and BCK (BCKI and BCKO) establish data transfer on serial data lines.
● IC1912 (SII9021) * 1 Tip: When using HDCP_LSI
Digital interface receiver with High-bandwidth Digital Content Protection (HDCP) composed of the dual-input type
TMDS (Transition-Minimized Differential Signaling).
Supports both HDMI (High-Definition Multimedia Interface) and DVI (Digital Visual Interface).
● IC1001 (IXB427WJ)
System's main microcomputer.
Exercises the overall system control such as power management, LED control, LCD panel control, lamp
control, and video processor/front-end control.
● IC1004 (IXB515WJQZ)
Flash memory that stores programs for the main microcomputer.
● IC1014 (IXB496WJQZ)
CPLD (Complex Programmable Logic Device) for system control.
Controls the timing for the bus transaction between the main microcomputer and the video processor, expands
GPIO (General Purpose I/O), delivers the reset signal to each IC, or disconnect the system bus while in stand-
by.
● IC1503 (IXB497WJQZ)
CPLD (Complex Programmable Logic Device) for panel/lamp control.
Used as an interface to the LCD controller PWB or the inverter PWB.

MAJOR IC INFORMATIONS

39
2
PROM to the built-in PRAM.
LC-26DA5U
LC-32DA5U
2 PROM and various