LC-26P50E (serv.man10). Major IC Information - Sharp TV Service Manual (repair manual). Page 2

●IC1905 24bit-DAC, VHiAK4384ET-1

The AK4384 is a 24-bit DAC that provides for better cost performance in digital audio equipment. The ∆Σ modulator
is equipped with the brand-new advanced multi-bit system for a wide dynamic range. The built-in post-filter is of
switch-cum-capacitor-filter (SCF) type to cope with the accuracy problem by clock jitters. The sampling rate reaches
up to 192 kHz.

●IC1906 4-INPUT/1-OUTPUT A-SELECTOR, VHiNJM2750M-1

The NJM2750 is a 4-input/1-output stereo audio selector. Based on the internal switch OP-AMP technology, the
NJM2750 has lower output noise, lower distortion and higher channel separation than the ordinary multiplexers or
analogue switches.

●IC2007 CPLD, RH-iXB495WJZZ

* This IC is an F.P.G.A. (Field Programmable Gate Array) that sync-processes all digitized input signals and selects
relevant signals. Its functions include extension I/O for the main microprocessor, timing control for bus signals
between ICs and others.

●IC2002 64Kb-E2PROM, VHiBR24L64F-1

The BR24L64F is a 2-wire (I2C bus type) serial EEPROM that is electrically programmable. This IC stores the control
data of system contents (last memory, for example) for the main microprocessor's AV PWB and main PWB. The
data is given out by commands from the main microprocessor.

●IC2003 32Mb-FLASH-memory, RH-iXB428WJZZ

The SST39VF168x devices are 2M x8 CMOS Multi-Purpose Flash Plus (MPF+) manufactured with SST's
proprietary, high performance CMOS SuperFlash technology. This flash memory has the basic function software,
various setting data, etc, and serves to communicate with the main microprocessor.

●IC3701 A/D AMP PLL, VHiMST9883C1EQ

This IC is an A/D converter that handles one channel with the analog RGB input and the 4:2:2 output at the YUV
input. The RGB or YPbPr signal, coming out of the video selector, gets digitized in this IC and fed to the video
processor (Trident IC).

●IC3300 VIDEO PROCESSER, RH-iXB405WJZZ

The A/D-converted video signal goes through I/P converter, scaler, frame rate converter, DNR, 3D digital comb filter,
dynamic picture enhancer, teletext, ICSC (Dual Channel Inversion Color Space Converter) and others for
processing the video signal data. The resulting digital signal gets converted to LVDS signal and reaches the LVDS
receiver.

●IC3301 128Mbit-GDDR-SDRAM, RH-iXB375WJZZ

This IC is a 1M, 32-bit, 4-bank graphic double data rate synchronous DRAM with bi-directional data strobe and DLL.
The SDRAM contains the video system setting data and video processor IC parameter setting data, and serves to
bus-communicate with the main microprocessor and the video processor IC.

●IC4601 LVDS-RECEIVER, VHiDS90C386-1

The DS90C386 is an LVDS receiver that gets 4 sets of LVDS (Low Voltage Differential Signaling) serial data back
to 24-bit (8-bit x 3) CMOS/TTL output parallel data. A set of clock signals is also fed to the receiver's PLL circuit to
get the LVDS data phase-adjusted and converted to parallel data. The resulting RGB signal, the HD, VD and
blanking signals, as well as the pixel clock signal are supplied to the panel controller IC (IC4502).

●IC4602 CPLD, RH-iXB445WJZZ

* This is an F.P.G.A. (Field Programmable Gate Array) IC that sync-processes all digitized input signals and selects
relevant signals. This IC serves to correct the panel drive signal.

●IC4501 32Kb-E2PROM, RH-iXB437WJZZY(26) / RH-iXB438WJZZY(32) / RH-iXB439WJZZY(37)

This IC is a 2-wire (I2C bus type) serial EEPROM that is electrically programmable. This EEPROM chip stores the
QS parameter LUT.