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LC-26P50E (serv.man10)
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Service Manual
TV / LCD / Major IC Information

Sharp LC-26P50E (serv.man10) Service Manual ▷ View online

This is a video switch with I2C bus control developed for use in high resolution TVs and projection TVs. It can switch
4 color difference signal lines (component signal), 5 S video signal lines and 8 composite signal lines.
The TC74HC4052A is a high-speed CMOS analog multiplexer/demultiplexer backed by silicon gate CMOS
technology. The multiplexer function includes the selection and mixing of analog and digital signals. The chip
consists of 4 channels (x 2). A digital signal through the control terminal turns on the switch of a corresponding
IC1104 IF-Demodurator/PLL, VHiTDA9886+-1
The TDA9886 is an alignment-free multi-standard (PAL, SECAM and NTSC) vision and sound IF signal PLL
demodulator for positive and negative modulation including sound AM and FM processing.
This IC features the following.
* Gain controlled wide-band vision intermediate frequency (VIF) amplifier (AC-coupled).
* Multi-standard true synchronous demodulation with active carrier regeneration (very linear demodulation,
  good  intermodulation figures reduced harmonics, excellent pulse response).
* Gated phase detector for L/L accent standard.
* Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free; frequencies switchable for all
  negative modulated standards via I2C bus.
* 4MHz reference frequency input [signal from phase-locked loop (PLL) tuning system] or operating as crystal
* VIF Automatic Gain Control (AGC) detector for gain control operating as a peak sync detector for negative
  modulated signals and as a peak white detector for positive modulated signals.
IC1103 I2C BUS DAC(8bit 2CH), VHiM62332FP-1
The M62332 is an integrated circuit semiconductor of CMOS structure with 2 channels of built-in D/A converters
with output buffer operational amplifiers. The input is 2-wire serial method that is used for the transfer format of digital
data to allow connection with a microprocessor with minimum wiring.
IC1100 VCA, VHiBA7655AF-1
The BA7655AF is a dual voltage-controlled amplifier IC. By varying the control voltage, the amplifier gain can be
varied in the range of -6dB to +6dB.
IC2501 MSP, VHiMSP3413G1E
The audio decoding IC is designed to decode S-IF signals and select input audio data. With this chip, the analog
TV-standard worldwide audio signals are processed in the PAL/SECAM regions and the NICAM digital sound
standard is also covered.
IC3900, IC3901 MAIN AMP, VHiTDA7480/-1
The TDA7480 is an audio class-D amplifier assembled in Power DIP package specially designed for high efficiency
IC2506 HP-AMP, VHiBH3544F+-1
This is a dual headphone output amplifier IC. It incorporates a POP noise prevention circuit and a thermal shut down
circuit (150˚C) that are used when turning the power on or off.
IC1904 HDMI-Receiver, VHiSii9021+-1Q
The Sii9021 is a second generation panel link cinema receiver that is compatible with the HDMI 1.1 (High Definition
Multimedia Interface) specification. The Sii9021 is capable of receiving and outputting two channel digital audio
signals at up to 192 kHz— an excellent solution for digital TVs.
This IC features the following.
1) Digital video interface supports video processors.
2) Analog RGB and YPbPr output: 10-bit DAC.
3) Digital audio interface supports high-end audio systems.
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.
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.
* 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.
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).
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
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.
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).
* 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.
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.
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.
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.
- M E M O -

Sharp LC-26P50E (serv.man10) Service Manual ▷ Download

  • DOWNLOAD Sharp LC-26P50E (serv.man10) Service Manual ↓ Size: 58.58 KB | Pages: 4 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp LC-26P50E (serv.man10) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp LC-26P50E (serv.man10) LCD. Information contained in Sharp LC-26P50E (serv.man10) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.