Power supply board issues - need help to understand electric schema

[vladc77]

I need help understanding how voltage is provided for the power supply board connector - CN5 con on the electric schema. The power board supply is not working correctly for CN-5. I hope someone may be able to help a beginner. Thank you in advance!

According to the attached electric schema "Schema-PSBoard_01.png", the CN5 connector should have the voltage values listed below but it gets incorrect voltage:

CN5pin1 gets +12v from IC401pin8   | On test it gets +12.3v which is close
CN5pin2 gets +5.6v from C411           | On test it gets +12.3v
CN5pin3 gets -12v from IC401pin4   | On test it gets 0v
CN5pin4: GND                                     | On test it gets 0v
CN5pin5 gets +15v from ZD403        | On test it gets -12.2v
CN5pin6 should be AC power            | On test it gets -12.2v, no AC power

However, according to the attached "PCB-Trace-View.png" diagram CN-5pin1 (+12v) and CN-5pin2 (+5.6v) are directly connected to one trace that is IC401p8 (+12v). There is no trace from C411 to CN-5pin2 to deliver 5.6v. These two pins are directly connected. How CN-5pin2 can have (+5.6v)?

According to the PCB-Trace-View.png diagram - CN5pin3 is not connected to IC401pin4 but to the ground. How CN5pin3 can get -12v?

The same with CN5pin5 (+15v), it is traced on PCB Trace view directly to IC401pin4 (-12v) and no connection to ZD403. How CN5pin3 can get +12v?

 I cannot identify what is damaged. I need help to understand how the voltage described in the electric schema "Schema-PSBoard_01.png" is delivered because looking at "PCB-Trace-View.png" does not match what is in the electric schema. I already removed all transistors for testing, most caps, and some diodes and they all seem to be OK. The caps are not 100% perfect but were working fine before. So, I do not know what else to check. Thank you!

[Gyro]

Isn't this a double post of  https://www.eevblog.com/forum/repair/power-supply-board-damage-reversed-polarity-on-two-cons/ ?

... Where you were receiving assistance from MathWizard.

[Gyro]

It just looks a bit bad when you already have a member helping you with the PSU there, especially when you are referencing CN-5 voltages in that thread too.

It's generally a good idea to keep stuff together to provide context, eg. what you did to cause the problem.

[vladc77]

Gyro, I moved it to the Beginners board.