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Service Manual CP-785F
* 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, Q822, 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.
* power supply IC delivery during TV set normal run
power supply line IC power supply delivery Remarks
FBT supplies 55V to I301 vertical IC
FBT supplies 55V to T401 H- drive
143V FBT FBT supplies 14V to I301 vertical IC
FBT supplies 33V to the tuner
FBT supplies 205V to I901 video amplifier pin 6
12V I602 sound amplifier pins 3-16
12V T401 H- drive
8V I501 Main IC pins 14-39
I601 Sound Demod pins 39-40
6V I703 IR receiver pin 1
I601 Sound Demod pins 7-18-57
5V I702 EEPROM pin 8
tuner
3.3V Main IC com part pins 54-56-61
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