Sharp LC-37SD1E, Service Manual

Page: 67 / 182

LC-37SA1E/RU
5 – 2
Ref No. Name Part Code Description Drawing
Name
IC1707 +3.3V VHIPQ20WZ11-1Y Low power-loss voltage regulators. Variable Output. Output current 1A.
Built-in overcurrent, overheat protection functions,ASO protection circuit.
IC1708 +1.8V VHIMP1410ES-1Y DC to DC Converter. 2A Step down switch mode regulator with a built in inter-
nal Power Mosfet.
Fault condition protection includes cycle-by-cycle current limiting and thermal
shutdown.
IC1706 BU+1.8V VHIMP1410ES-1Y DC to DC Converter. 2A Step down switch mode regulator with a built in inter-
nal Power Mosfet.
Fault condition protection includes cycle-by-cycle current limiting and thermal
shutdown.
KD604FM (AV UNIT)
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 ampli-
fier system can be built.
In this model, Audio amplifier is 10watt. AV1
KD605FM (POWER UNIT)
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
KD608FM (TUNER UNIT)
IC201
IF-
Demodurator/
PLL VHI-1Y The TDA9886 is an alignment-free multistandard (PAL, SECAM and NTSC)
vision and sound IF signal PLL demodulator for positive and negative modula-
tion in cluding sound AM and FM processing. TUNER