LC-37SA1E (serv.man5). Major IC Informations - Sharp TV Service Manual (repair manual). Page 2

LC-37SA1E/RU/LC-37SV1E/RU

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IC1707

+3.3V

VHIPQ20WZ11-1Y

Low power-loss voltage regulators. Variable Output. Output current 1A. 
Built-in overcurrent, overheat protection functions,ASO protection circuit.

M6

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.

M6

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.

M6

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

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 
circuits are built in this IC.   

P1

IC704

Switching 
Regulator

VHIMR4030++-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

VHITDA9886+-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