Sir cybertwenties . . . . . . .
Can you visually inspect your board and see if this overlay is correct ?
Particularly, all of the filter capacitor leads, but I think that they are right.
The dark area
BELOW YELLOW A filter capacitor still precludes my seeing what it is hiding.
See what component the RED circles are connecting to.
Looks like the INITIAL 3.5VDC supply comes in from the BLUE RECTANGLE,
I see the blue C8 ceramic cap shunting it but what is the power diodes numbering just above it.
The raw 9 V supply starts at the WHITE / RED A at the Schottky pair common cathode and moves left to B for some initial filtering.
From YELLOW cap A, it then drops down to B and gets more filtering from YELLOW cap D and passes to the right to D and then up thru HF filter choke L1 and up to E, pass to the right to F and a final filtering from YELLOW cap E, then it passes up to the pair of 9VDC pins . . . .GG . . . . at the connector.
On this NEW (used) power supply that you want to use . . . .is it sealed, or can it be disassembled for internal inspection ?
(Relevant to getting its 12VDC down to 9VDC.)
ITS PHOTO REFERENCING:
73's de Edd