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Service Manual - Cenatel

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* power supply functioning during TV set normal run mode<br />

- I801 transmits controlled pulses to T801 which generates DC voltages after rectifications by secondary part diodes<br />

and electro capacitors (by example by D820 and C813 on 143V supply voltage line).<br />

- 8V, 5V, 3.3V supply voltage lines have stabilized voltages obtained by I820, I822, I823 voltage regulators.<br />

- On 143V supply voltage line, R823 resistor has been chosen to reach exact DC voltage required on this line.<br />

- 143V supply voltage line includes an IC error amplifier (I806) which corrects unexpected DC voltage variations on<br />

this line.<br />

* power supply IC delivery during TV set normal run<br />

power supply line IC power supply delivery Remarks<br />

143V FBT FBT supplies 43V to I301 vertical IC<br />

FBT supplies 43<br />

V to T401 H- drive for CP785<br />

FBT supplies 12V to I301 vertical IC<br />

FBT supplies 33V to the tuner<br />

FBT supplies 188V to I901 video amplifier pin 6<br />

14.5V I602 sound amplifier pins 3-16<br />

14V T401 H- drive<br />

8V I501 Main IC pins 14-39<br />

I601 Sound Demod pins 38-39-40<br />

5V I703 IR receiver pin 1<br />

I501 Main IC pins 3-15-45<br />

I601 Sound Demod pins 7-18-57<br />

I702 EEPROM pin 8<br />

tuner<br />

3.3V I501 Main IC pins 25-54<br />

b) TV set on stand-by mode<br />

* TV set circuit diagram on stand-by mode<br />

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