Dead Fan4800 replacment 6800
All smd tranzistor change
i Q703 MPS2222
q703 emitor 20 volt ?

Q703
Emitter Voltage 14.3V
Base Voltage 15.0V
Collector Voltage 16.5V (19.5V)

Verify D703 zener diode 15V
Verify Q703 again

Warning
For CM6800 ABSOLUTE MAXIMUM RATINGS
VCC 20V

Did the replaced CM6800 chip also burn out?

I changed Q 703 and D703, although according to the instrument they were correct, and in the end they were.
I put 530 ohms in the r607 by mistake, because the power supply was repaired a year ago in a hurry.
Of course, now I have corrected the error, checked all the smd transistors, they are all OK
I also changed u201 FAN4800. I again put 6800 voltage, e 0.7 volts
mps2222 emitter 20 volts Base 1.50 and Collector 0.7 volts

I don't know what else to do!
IC-501
TNY278
Pin1 -0.5 volti
Pin2 -6.2 volti-ok
Pin4 -305 volti

If U702 active then Q703
Collector Voltage 16.5V (19.5V)
Base Voltage 15.0V
Emitter Voltage 14.3V

If U702 passive then Q703
Collector Voltage 16.5V (19.5V)
Base Voltage 0V
Emitter Voltage 0V