Hello everyone !
In the attached diagram I replaced the POWER CTL IC with a new one but the only secondary stage semnificative voltage more than 1V is -5V on C520 (instead of -28V).
Also on IC501 pin3 I don't understand how should be 4.69 V and 9 V the same time.
Primary stage voltages marked by red refferenced to primary stage ground.
During measurements PSU disconnected (no load, no power-on voltage).
It seems it is in std-by / protection mode.
Can not standalone power-on on pin 10 CD 502 connector due all secondary voltages less than 1 V.
In the attached diagram I replaced the POWER CTL IC with a new one but the only secondary stage semnificative voltage more than 1V is -5V on C520 (instead of -28V).
Also on IC501 pin3 I don't understand how should be 4.69 V and 9 V the same time.
Primary stage voltages marked by red refferenced to primary stage ground.
During measurements PSU disconnected (no load, no power-on voltage).
It seems it is in std-by / protection mode.
Can not standalone power-on on pin 10 CD 502 connector due all secondary voltages less than 1 V.
