Sharp LC-32GA8 Service Manual page 47

· 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 efficiency 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.
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.
FD608WJ (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) amplifier (AC-coupled).
* Multi-standard true synchronous demodulation with active carrier regeneration (very linear demodulation,
good intermodulation figures 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.
* 4MHz reference frequency input [signal from phase-locked loop (PLL) tuning system] or operating as crystal
oscillator.
* VIF Automatic Gain Control (AGC) detector for gain control operating as a peak sync detector for negative
modulated signals and as a peak white detector for positive modulated signals.
47
LC-26GA5E
LC-32GA8/LC-32BV8
LC-32GA5E
LC-37GA8/LC-37BV8