Read Sharp LC-26P55E (serv.man10) Service Manual online
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LC-26GA5E
LC-32GA5E
LC-26P55E
LC-32P55E
LC-37P55E
MAJOR ICs INFORMATION
1. General ICs Information
XD603WJ (MAIN UNIT):
· IC1701: POWER RESET OF +BU1.8V
Part number:
BU4239G
Sharp code:
VHIBU4239G+-1Y
Low voltage detector IC with adjustable output delay. Standard Detection Voltage = 3.9V
· IC1702: BU+3.3V (VOLTAGE INPUT: BU+5V)
Part number:
PQ20WZ11
Sharp code:
VHIPQ20WZ11-1Y
Low power-loss voltage regulators. Variable Output. Output current 1A. Built-in overcurrent, overheat protection func-
tions, ASO protection circuit.
· IC1703: S+8V (VOLTAGE INPUT: POW+12V)
Part number:
PQ20WZ11
Sharp code:
VHIPQ20WZ11-1Y
Low power-loss voltage regulators. Variable Output. Output current 1A. Built-in overcurrent, overheat protection func-
tions, ASO protection circuit.
· IC1706: BU+1.8V (VOLTAGE INPUT: BU+5V)
Part number:
MP1410
Sharp code:
VHIMP1410ES-1Y
DC to DC Converter. 2A Step down switch mode regulator with a built in internal Power Mosfet. Fault condition pro-
tection includes cycle-by-cycle current limiting and thermal shutdown.
· IC1707: +3.3V (VOLTAGE INPUT: POW+5V)
Part number:
PQ20WZ11
Sharp code:
VHIPQ20WZ11-1Y
Low power-loss voltage regulators. Variable Output. Output current 1A. Built-in overcurrent, overheat protection func-
tions, ASO protection circuit.
· IC1708: +1.8V (VOLTAGE INPUT: POW+5V)
Part number:
MP1410
Sharp code:
VHIMP1410ES-1Y
DC to DC Converter. 2A Step down switch mode regulator with a built in internal Power Mosfet. Fault condition pro-
tection includes cycle-by-cycle current limiting and thermal shutdown.
· IC1710: CPLD
Part number:
EPM3064
Sharp code:
RH-IXB716WJZZQ
This IC is a CPLD of Altera and use CMOS EEPROM cells to implement logic functions with 64 Macrocells. This
device controls ON/OFF power supply and signals for inverter unit.
· IC1901 : NVM OF HDMI (E-EDID)
Part number:
24LC2BIN
Sharp code:
VHI24LC2BIN-1Y
This IC is a 2-wire (I2C bus type) serial EEPROM this is electrically programmable. This EEPROM chip stores the
data structure used to carry configuration information for optimal use of a display (EDID data).
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LC-26GA5E
LC-32GA5E
LC-26P55E
LC-32P55E
LC-37P55E
· IC1905 : HDMI RECEIVER
Part number:
Sii9021
Sharp code:
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 sig-
nals 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.
· IC2301 : RS-232 TRANSMITTERS/RECEIVERS
Part number:
ISL83220
Sharp code:
VHIISL83220-1Y
The ISL83220E is a 3.0V to 5.5V powered RS-232 transmitter/receiver,+/-15kV ESD protected, minimum data rate
250 kpbs.
· IC2303 : NVM OF PC MODE (EDID)
Part number:
BR24C21F
Sharp code:
VHIBR24C21F-1Y
This IC is a 2-wire (I2C bus type) serial EEPROM this is electrically programmable. This EEPROM chip stores the
data structure used to carry configuration information for optimal use of a display (EDID data).
· IC2701 : SYNC SELECT
Part number:
TVHC153T
Sharp code:
VHITVHC153T-1Y
This VHC153 is a high-speed Dual 4-input multiplexer with common select inputs and individual enable inputs for
each section.
·
IC2702 & IC2705: VIDEO INPUT SELECTOR.
Part number: MM1507XN
Sharp code: VHIMM1507XN-1Y
This IC extends the series of ICs for video/audio signal switching, with a 2-input 1-output single video switch with 75Ω
driver and input clamp.
IC2704 : HDMI & RGB SOUND MULTIPLEXER
Part number:
CD4052BP
Sharp code:
VHICD4052BP-1Y
The TC74HC4052A is a high-speed CMOS analog multiplexer/demultiplexer backed by silicon gate CMOS technol-
ogy. 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 channel.
· IC3001 : NVM 64Kb-E2PROM
Part number:
BR24L64F
Sharp code:
VHIBR24L64F-1Y
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.
· IC3002 : VIDEO PROCESSOR
Part number:
VCT6973G-B2
Sharp code:
RH-IXB624WJZZQ
The VCT 6wxyP family is dedicated to high-quality FPD and double-scan TV sets. The memory and program
ROM are integrated in the IC. Modular design and deep submicron technology allow the integration of audio,
video, teletext, OSD, and controller-related functionalities. They cover the whole range of flat-panel display TVs.
The IC is based on proven functional blocks of existing products like VCT 49xxI, VSP 94x5B, and DPS 94xxB.
Each member of the IC family contains the entire audio, video, upconversion processing for 4:3 and 16:9 50/60 Hz
progressive or 100/120 Hz interlaced stereo TV sets plus the control/data interface for flat-panel displays. The inte-
grated microcontroller is supported by a powerful OSD and graphics generator with integrated teletext acquisition.
The VCT 6wxyP family provides a front-end video processing unit with 4 CVBS-Y/C or component inputs for
HDTV, EDTV, and SDTV. A VBI slicer, support of 1000 pages of teletext, and a 3-D comb filter for PAL and NTSC
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LC-26GA5E
LC-32GA5E
LC-26P55E
LC-32P55E
LC-37P55E
(in certain versions) are also available. The front-end unit further allows to process an SD and an HD source in paral-
lel, thus enabling PiP and PaP functionality. Motion-adaptive de-interlacing, temporal noise reduction, and film mode
detection are based on a unified memory technology.
Post-scaling in the display processing block ensures the desired output format. Display processing is supported by
an 8-bit 8051-compatible controller. By means of powerful alpha-blending, the graphics mixer composes the output
image from following image layers: the video layer, the OSD layer and the pixel graphics layer.
The audio part consists of a multistandard sound IF demodulator and a baseband processor supporting all desired
sound features in this range.
A connection for additional features, such as advanced motion compensation via -Micronas’ FRC 94xyA, is also
provided.
·
IC3003 : PIC MICROCONTROLLER
Part number:
PIC16F913
Sharp code:
RH-IXB664WJZZY
28 Pin Flash-Based, 8 bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology.
This IC is controlled via I2C and works how expander of ports. This IC has led control and include A/D converter.
·
IC3005: RESET IC FOR VCTP (IC3002)
Part number: BU4215G
Sharp code: VHIBU4215G+-1Y
Low voltage detector IC with adjustable output delay. Standard detection voltage = 1.5V
FD604WJ (AV UNIT):
· IC301 & IC302 : AUDIO AMPLIFIER
Part number:
TDA8931T
Sharp code:
VHITDA893T-1Y
The TDA8931 is a switching power stage for high efficiency class-D audio power amplifier systems. The IC has a high
efficiency so that a heat sink is not required up to 20W (RMS).
· IC303 : HEADPHONE AMPLIFIER
Part number:
NJM4558M
Sharp code:
VHINJM4558M-1Y
The NJM4558 is a dual high-gain operational amplifier internally compensated and constructed on a single silicon
chip using an advanced epitaxial process.
· IC1101 & IC1102: VIDEO OUTPUT
Part number:
MM1506XN
Sharp code:
VHIMM1506XN-1Y
This IC extends the series of ICs for video/audio signal switching, with a 2-input 1-output single video switch with 75W
driver and input bias (6dB gain).
· IC1201: VIDEO INPUT
Part number:
MM1507XN
Sharp code:
VHIMM1506XN-1Y
This IC extends the series of ICs for video/audio signal switching, with a 2-input 1-output single video switch with 75Ω
driver and input clamp.
FD605WJ (POWER SUPPLY UNIT):
· IC704: POWER SUPPLY CONTROLLER FOR INVERTER
Part number:
MR4020 (26”) / MR4030 (32”/37”)
Sharp code:
VHIMR4020++-1 / VHIMR4030++-1
A high speed 900V IGBT makes ideal partial resonance operation which ensures high efficiency and low noise.
Very low power consumption at micro-loads (burst mode). Start-up circuit eliminates the need for start-up resistor.
Excess current protection (ON period limitation, primary current limitation), excess voltage protection, and thermal
shut-down function are incorporated.
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LC-26GA5E
LC-32GA5E
LC-26P55E
LC-32P55E
LC-37P55E
·
IC705: POWER SUPPLY CONTROLLER FOR SIGNAL BOARD
Part number:
MR4020
Sharp code:
VHIMR4020++-1
A high speed 900V IGBT makes ideal partial resonance operation which ensures high efficiency and low noise.
Very low power consumption at micro-loads (burst mode). Start-up circuit eliminates the need for start-up resistor.
Excess current protection (ON period limitation, primary current limitation), excess voltage protection, and thermal
shut-down function are incorporated.
· IC706 & IC707: FEEDBACK CONTROL
Part number:
TA76431R
Sharp code:
VHITA76431R-1Y
Adjustable precision shunt regulator for feedback control for driving an optocoupler in power supplies.
· IC708: LOW AC MAINS VOLTAGE DETECTOR
Part number:
NJM2904M
Sharp code:
VHINJM2904M-1Y
The IC consists of two independent, high gain internally frequency compensated operation amplifiers which were
designed specifically to operate from single power supply.
IC709: +24V/+5V VOLTAGE SUPERVISOR.
Part number: NJM2903M
Sharp code: VHINJM2903M-1Y
The IC consist of two independent precision voltage comparator, high gain internally frequency compensated opera-
tion amplifiers which were designed specifically to operate from single power supply.
FD607WJ (RC/LED UNIT):
·
IC101 : OPC SENSOR
Part number:
TPS850
Sharp code:
VHITPS850++-1Y
The TPS850 is a linear-output photo-IC which incorporates a photodiode and current amp circuit in a single chip. This
photo-IC is current output type, so can set up output voltage freely by arbitrary load resistance.
FD608WJ (TUNER UNIT):
· IC201 : IF-Demodulator/PLL
Part number:
TDA9886
Sharp code:
VHITDA9886+-1Y
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).
* Gate 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
oscillator.
* 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.