Daewoo DWP-28W2ZZF Service Manual download pdf (Page 68)

Appendix Service manual WP-795

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2-9-2-1-3 power supply functioning during TV set normal run mode

- I801 transmits controlled pulses to T801 which generates DC voltages after rectifications by secondary

part diodes and electro capacitors (by example by D820 and C813 on 143V supply voltage line).

- 8V, 5V, 3.3V supply voltage lines have stabilized voltages obtained by I820, I822, I823 voltage

regulators.

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

line.

- 143V supply voltage line includes an IC error amplifier (I806) which corrects unexpected DC voltage

variations on this line.

2-9-2-1-4 power supply IC delivery during TV set normal run

power supply line IC power supply delivery Remarks

143V

FBT

FBT supplies 45V to I301 vertical IC

FBT supplies 45V to T401 H-drive

FBT supplies 14V to I301 vertical IC

FBT supplies 33V to the tuner

FBT supplies 185V to I901 video amplifier pin 6

14.5V I602 sound amplifier pins 3-16

11V T401 H- drive

8V I501 Main IC pins 14-39

I601 Sound Demod. pins 38-

39-40

6V I703 IR receiver pin 1

I601 Sound Demod. pins 7-18-

I702 EEPROM pin 8

tuner

3.3V

Main IC

com part pins 54-

56-61

1 2 ... 63 64 65 66 67 68 69 70

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Daewoo DWP-28W2ZZF Service Manual Page 68