LC-26P50E (serv.man10). Major IC Information - Sharp TV Service Manual (repair manual). Page 3

●IC4502 LCD-CONT, RH-iXB326WJZZ

Equipped with LVDS input and RSDS output interfaces and overdrive support, this LCD control IC drives the HE,
WXGA, XGA, WVGA and VGA panels. Its main functions include: 1) The LCD drive timing signal generating circuit
processes the pixel clock, horizontal and vertical sync signals, and display enable signal to produce various signals
for driving the LCD source and gate driver. 2) The serial interface circuit is activated with TV microprocessor and
3-wire serial interface to control the internal register. 3) Right-and-left inversion and up-and-down inversion. 4) Test
pattern generation. 5) Dimmer circuit. 6) Simplified onscreen display. 7) 2 channels of RSDS transmitters with 8 bits
each for RGB.

●IC4503 64Mb-SDRAM, RH-iXB029WJZZ

The 64Mb SDRAM is a high-speed CMOS dynamic random-access memory that contains 67,108,864-bit columns
by 32 bits. This IC is used as a frame memory, and its data is employed to compute the QS level.

●IC4104 PANEL DC/DC, RH-iXB332WJZZ

This IC is a variable large-current quad output switching regulator that supplies power to the TFT LCD panel. The
device operates in the input voltage range of 4.5-22 V, and individually feeds the VLOGIC, AVDD, VON and VOFF
output voltages that are necessary for the TFT LCD applications. The LT1943 is equipped with a 2.4-A step-down
regulator for the VLOGIC voltage, a 2.6-A step-up regulator to drive the TFT, a high-voltage TFT bias output, and
a negative TFT bias inverter.

●IC4101 GLAY LEVEL, VHiBD8133FV-1

This is a gradation voltage generating IC for the TFT LCD panel. Here are its features.

1) The 18-channel gradation voltage DAC output is incorporated on a single chip.
2) The Vcom amplifier is built in.
3) Each voltage can be preset through the 10-bit DAC.