Sharp LC-37XD10, Руководство по обслуживанию

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LC-37XD10E/RU
5 – 2
IC1706 BU+1.8V VH+-1Y DC to DC Converter. 3A Step down switch mode regulator with a built in internal Power
Mosfet.
Fault condition protection includes cycle-by-cycle current limiting and thermal shut-
down. M8
IC1707 +3.3V VHIPQ20WZ11-1Y Low power-loss voltage regulators. Variable Output. Output current 1A.
Built-in overcurrent, overheat protection functions,ASO protection circuit. M8
IC1708 +1.8V VHIMP1410ES-1Y DC to DC Converter. 2A Step down switch mode regulator with a built in internal Power
Mosfet.
Fault condition protection includes cycle-by-cycle current limiting and thermal shut-
down. M8
IC1712 BU+2.5V VHIMP1410ES-1Y DC to DC Converter. 2A Step down switch mode regulator with a built in internal Power
Mosfet.
Fault condition protection includes cycle-by-cycle current limiting and thermal shut-
down. M8
[AV SEC-
TION]
IC301
IC302
Sound Amp VHITDA8931T-1Y The TDA8931 is a switching power stage for high efficiency class-D audio power ampli-
fier systems.
With this amplifier a compact 1x 20 W closed loop self-oscillating digital amplifier sys-
tem can be built.
In this model, Audio amplifier is 15watt *2. AV1
[POWER
SUPPLY
SECTION]
IC705
Switching
Regulator 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 circuits
are built in this IC. P1
IC704 Switching
Regulator 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 circuits
are built in this IC. P1
IC701 Power Factor
Correction VHIFA5501AN-1Y FA5501AN is a control IC for a power factor correctoin converter using critical conduc-
tion mode.
A CMOS process with high dielectric strength is employed to implement low power
consumption.
This IC contains a correction circuit for light load to suppress rise of output voltage in
light load mode snd an FB short detection circuit for stopping operatoin when the out-
put voltage detection section becomes faulty. P1
[DIGITAL
SECTION]
IC4001
DTV-PRO-
CESSOR 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 soft-
ware 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 negotia-
tion communication with CI-CARD. D3
IC4401 BALANCE
TRAN-
CEIVER 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 used to switch bus of the
data from CICARD. D3
IC4404 Buffer/Line
Driver VHILCX244MT-1Y This lC is fabricated with an advanced CMOS technology to achieve high speed opera-
tion 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-1Y This IC is a Triple operational amplifiers featuring high video performances with large
bandwidth, low distortion and excellent supply voltage rejection. In this equipment, it is
used to convert audio output signal of the digital processor to normal analog signal
level and to buffer it. D4