LC-37GA9EK (serv.man9). Major ICs Information - Sharp TV Service Manual (repair manual). Page 4

Read Sharp LC-37GA9EK (serv.man9) Service Manual online

47
 LC-26GA5E
 LC-32GA5E
  LC-32GA9E/LC-32BV9E
  LC-37GA9E/LC-37BV9E
·
 IC704:   POWER SUPPLY CONTROLLER FOR SIGNAL BOARD
   Part number:  
MR4020
   Sharp code:  
VHIMR4020++-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.
Page of 25
Display

Click on the first or last page to see other LC-37GA9EK (serv.man9) service manuals if exist.