Sharp LC-32GD8EE Service Manual page 61

FD605WJ (POWER SUPPLY UNIT):
· IC704: POWER SUPPLY CONTROLLER FOR SIGNAL BOARD
Part number: MR4030
Sharp code: VHIMR4030++-1
A high speed 900V IGBT makes ideal partial resonance operation which ensures high effi ciency and low noise.
Very low power consumption at micro-loads (burst mode).
Start-up circuit eliminates the need for start-up resistor.
Excess current protection (ON period limitation, primary current limitation), excess voltage protection, and thermal
shut-down function are incorporated.
· IC705: POWER SUPPLY CONTROLLER FOR INVERTER
Part number: MR4020
Sharp code: VHIMR4020++-1
A high speed 900V IGBT makes ideal partial resonance operation which ensures high effi ciency and low noise.
Very low power consumption at micro-loads (burst mode).
Start-up circuit eliminates the need for start-up resistor.
Excess current protection (ON period limitation, primary current limitation), excess voltage protection, and thermal
shut-down function are incorporated.
· IC706 & IC707: FEEDBACK CONTROL
Part number: TA76431R
Sharp code: VHITA76431R-1Y
Adjustable precision shunt regulator for feedback control for driving an optocoupler in power supplies
IC708: LOW AC MAINS VOLTAGE DETECTOR.
Part number: NJM2904M
Sharp code: VHINJM2904M-1Y
The IC consists of two independent, high gain internally frequency compensated operation amplifi ers which were
designed specifi cally to operate from single power supply.
IC709: +24V/+5V VOLTAGE SUPERVISOR.
Part number: NJM2903M
Sharp code: VHINJM2903M-1Y
The IC consist of two independent precision voltage comparator, high gain internally frequency compensated opera-
tion amplifi ers which were designed specifi cally to operate from single power supply.
FD607WJ (RC/LED UNIT):
· IC101 : OPC
Part number: TPS850
Sharp code: VHITPS850++-1Y
The TPS850 is a linear-output photo-IC which incorporates a photodiode and current amp circuit in a single chip. This
photo-IC is current output type, so can set up output voltage freely by arbitrary load resistance.
FD609WJ (TUNER UNIT):
· IC201 : IF-Demodulator/PLL
Part number: TDA9886
Sharp code: VHITDA9886+-1Y
The TDA9886 is an alignment-free multi-standard (PAL, SECAM and NTSC) vision and sound IF signal PLL
demodulator for positive and negative modulation including sound AM and FM processing.
This IC features the following.
* Gain controlled wide-band vision intermediate frequency (VIF) amplifi er (AC-coupled).
* Multi-standard true synchronous demodulation with active carrier regeneration (very linear demodulation,
good intermodulation fi gures reduced harmonics, excellent pulse response).
* Gate phase detector for L/L accent standard.
* Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free; frequencies switchable for all
negative modulated standards via I2C bus.
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LC-26GA5E
LC-32/37GD8E/RU
LC-32GA5E
LC-32/37BT8E/RU