Sharp LC-46XD1E/RU, Руководство по обслуживанию

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LC-46/52XD1E-RU
7 – 2
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 VH+-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 VH+-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