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Appendix
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
143V
14.5V
11V
8V
6V
5V
3.3V
IC power supply delivery
FBT
I602 sound amplifier pins 3-16
T401 H- drive
I501 Main IC pins 14-39
I601 Sound Demod. pins 38-
39-40
I703 IR receiver pin 1
I601 Sound Demod. pins 7-18-
57
I702 EEPROM pin 8
tuner
Main IC µcom part pins 54-
56-61
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
- 41 -
Service manual CP-795
Remarks
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