Sharp LC-37XD1E Service Manual page 56

LC-37XD1E/RU
IC1706 BU+1.8V VHIMP1410ES-1Y
IC1707 +3.3V VHIPQ20WZ11-1Y
IC1708 +1.8V VHIMP1410ES-1Y
IC1712 BU+2.5V VHIMP1410ES-1Y
[AV SEC-
TION]
IC301 Sound Amp VHITDA8931T-1Y
IC302
[DIGITAL
SECTION]
IC4001 DTV-PRO- RH-IXB680WJZZQ
CESSOR
IC4201 64M-SDRAM RH-IXB742WJZZQ
IC4202 64M-SDRAM RH-IXB742WJZZQ
IC4203 16Mbit- RH-IXB921WJZZQ
FLASH
IC4402/05 RATCH-3 VHILCX573FT-1Y
STATE
IC4401 BALANCE VHITCLCX245-2Y
TRAN-
CEIVER
IC4404 Buffer/Line VHILCX244FT-1Y
Driver
IC4604 3-OP-AMP VHITSH73CPT-1Y
[DIGITAL
TUNER
SECTION]
IC202 COFDM RH-IXB682WJZZQ
Demod IC
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.
Low power-loss voltage regulators. Variable Output. Output current 1A.
Built-in overcurrent, overheat protection functions,ASO protection circuit.
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.
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.
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.
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.
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.
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.
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.
This is a RATCH-3 STATE output IC. In this equipment, it is used to establish negotia-
tion communication with CI-CARD.
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.
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.
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.
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 processor to
implement video/audio decode processing. This IC is used for digital tuner only.
5 – 2
AV1
D1
D2
D2
D2
D3
D3
D3
D4
TUN
ER