LC-46XD1E (serv.man7). Major IC Informations - Sharp TV Service Manual (repair manual). Page 2

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LC-46/52XD1E-RU
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IC2303
E2PROM
VHIBR24C21F-1Y
This IC is a 2-wire (I2C bus type) serial EEPROM this is electrically programmable.
The EEPROM chip stores the EDID data of PC input. This data is controlled through 
I2C signals.
[AV SEC-
TION]
IC301  
IC302
Sound Amp
VHITDA8931T-1Y
The TDA8931 is a switching power stage for high efficiency class-D audio power 
amplifier systems.
With this amplifier a compact 1x 20 W closed loop self-oscillating digital amplifier 
system can be built. 
In this model, Audio amplifier is 15watt *2.
AV1
[POWER 
SUPPLY]
IC705
Switching Reg-
ulator
VHIMR4020++-1
This IC is a power supply for the switching regulator on the primary side. 
Overvoltage/overcurrent protection circuit, other protection circuits and control cir-
cuits are built in this IC.  
P1
IC704
Switching Reg-
ulator
VHIMR4040++-1
This IC is a power supply for the switching regulator on the primary side. 
Overvoltage/overcurrent protection circuit, other protection circuits and control cir-
cuits are built in this IC.  
P1
IC701
Power Factor 
Correction IC
VHIFA5501AN-1Y
The FA5501AN control IC makes up a power factor correction converter with critical 
value mode. With the high-voltage CMOS process adopted, this IC provides for low 
power consumption. It is also equipped with various circuits: light-loaded correction 
circuit to suppress output voltage rises under light load, FB short-circuit detection cir-
cuit to interrupt the operation if the output voltage detector gets in trouble, etc.
[DIGITAL 
SECTION]
IC4001   
DTV-PROCES-
SOR
RH-IXB680WJZZQ
This is a video/audio signal processing IC (Digital Processor) (STi5516) for digital 
tuner, which has been manufactured by STMicroelectronics, and incorporates a 
CPU. In this equipment, it implements GUI processing and video/audio processing 
for digital tuner, negotiation processing with CI-CARD, etc. 
D1
IC4201   
64M-SDRAM
RH-IXB742WJZZQ
This IC is  64Mb SDRAM (static dynamic random-access memory )IC.
In this equipment, it is used for SMI memory (for image processing), and data is 
used for operation of the digital processor.                                                                                                                                                           
D2
IC4202   
64M-SDRAM
RH-IXB742WJZZQ
This IC is  64Mb SDRAM (static dynamic random-access memory )IC.
In this equipment, it is used for EMI memory (generally for CPU), and data is used 
for operation of the digital processor.
D2
IC4203  
16Mbit-FLASH
RH-IXB921WJZZQ
This IC is a high performance CMOS super technology 16Mbit Flash Memory.
Start software (loader) for the CPU with a built-in digital processor and application 
software have been written on this Flash Memory. 
The digital processor reads these softwares on start-up and implements them.
D2
IC4402/05    RATCH-3 
STATE
VHILVC573AP-1Y
This is a RATCH-3 STATE output IC. In this equipment, it is used to establish negoti-
ation communication with CI-CARD.
D3
IC4401   
BALANCE 
TRANCEIVER
VHITCLCX245-2Y
This IC is a low voltage (3.3V) CMOS 8bit bidirectional transceiver. When setting the 
transmission direction change input DIR to “H”, the A bus is switched to input and 
the B bus is changed to output; if the DIR is set to “L”, the B bus is switched to input 
and the A bus is changed to output. When setting the enable input OE to “H”, both A 
and B buses enter the high impedance state. In this equipment, it is used to switch 
bus of the data from CI-CARD.
D3
IC4404   
Buffer/Line 
Driver
VHILCX244MT-1Y
This lC is fabricated with an advanced CMOS technology to achieve high speed 
operation while maintaining CMOS low power dissipation. 
In this equipment, it is used to control negotiation communication with CI-CARD.
D3
IC4604    
3-OP-AMP
VHITSH73CPT
This IC is a Triple operational amplifiers featuring high video performances with 
large bandwidth, low distortion and excellent supply voltage rejection.  In this equip-
ment, it is used to convert audio output signal of the digital processor to normal ana-
log signal level and to buffer it.
D4
[DIGITAL 
TUNER 
SECTION]
IC202
COFDM 
Demod IC
RH-IXB682WJZZQ
This is a COFDM (Coded Orthogonal Frequency Division Multiplex) Demodulator IC. 
In this equipment, IF signal from the digital tuner is decoded to MPEG-2 signal, and 
it is digitally output. Output signal is fed to the digital processor to implement video/
audio decode processing. This IC is used for digital signal is fed to the digital proces-
sor to implement video/audio decode processing. This IC is used for digital tuner 
only.
TUN
ER
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